International Conference on Civil & Structural Engineering June 21-22, 2018 | Paris, France

Biography:

Professor Valery Rudyak is Honoured Science Worker of Russian Federation. He is head of theoretical mechanics department of the Novosibirsk State University of Architecture and Civil Engineering; simultaneously he is main research scientist of the Siberian Federal University. He is author of 6 monographs and more than 200 papers in reputed journal and he has been serving as an editorial board member of four journals.

Professor Liliya Il’ina has completed his PhD and Doctoral thesises from Novosibirsk State University of Architecture and Civil Engineering. Now she is dean of the Faculty of the ingineering and information thechnologies and professor of the department of building materials. She has published more than 70 papers in journals. 

Abstract:

The high mechanical strength of the concrete is the most important property of its application. It is depended on many well studied factors (the water–cement ratio, porosity etc.). It is known that the strength of concrete increases with the addition of microdispersed additives of different chemical composition. However there are very contradictory experimental data about mass fraction of the microdispersed additives to strengthen concrete. In our opinion the possible reason of the such discrepancy of the experimental data may be the different size of microdispersed additives used. The aim of this paper is the experimental study of the effect of the particle size and mass fraction of the different microdispersed additives on the strength of the concrete. The results of mechanical strength tests of fine-grained concrete from the dispersity and the mass fraction of additives, reactive silica fume and inert diopside, are presented. It has been shown that the optimum amount providing greater reinforcement samples decreases with decreasing the dispersity of inert mineral additive. It was found the optimal ratio of silica fume and the diopside to maximize the strength properties of the material. In this case the strength characteristics of the fine-graned concrete has the strength characteristics is 2.5 times higher than the control sample.

Biography:

Abstract:

The main objective of this research investigation is to study the effect of Olive Mill Waste (OMW) ash and Normal Coal (NC) ash on some engineering properties of normal strength concrete such as workability and compressive strength and hopefully select a better alternative for the concrete mix utilising such wastes. Thus, this will lead to reach a clear environment and   reduce the overall cost of concrete mix by reducing the amount of cement content, as a result of replacing these wastes in the concrete mix.  Overall, there are numerous benefits associated with the recycling of such waste products for the provision of a substitute concrete mix. Firstly, replacing a certain amount of cement with OMW and NC ash would reduce the overall cost of the concrete mix. Additionally, restoring theses wastes would decrease the levels of pollution which would otherwise increase the spread of pests and negatively impact the health of the population. 

Biography:

Abstract:

The evolution of knowledge on geopolymers (GP), and more generally on alkali activated materials (AAM); tend to show that they could potentially offer an efficient alternative to ordinary Portland cement (OPC) in particular applications. Alkali-activated materials began to emerge as a new material for civil engineering more than three decades ago, and recent years have seen an increase in researches by the international scientific community and by industrial firms. However, in the many constructions currently under way in the world, the use of activation of metakaolin alone remains marginal.

In this research, a series of fiber combinations and volume fractions between steel fibers with end-hooked or spiraled and synthetic fibers were incorporated in a high strength ambient cured geopolymer matrix. The performance of synthesized geopolymer composites was compared in terms of fresh and hardened state properties, such as workability, compressive strength, modulus of elasticity, Poisson’s ratio, flexural tensile strength, energy absorption capacity and post-peak residual strength etc.

The test results show that the addition of fibers significantly improved the load carrying capacity of the composites under flexure load, together with an improved behavior in compression. In general, all fiber reinforced composites displayed a stable deflection hardening response and multiple-cracking failure mode. Moreover, among composites with different fiber volume fractions, the composite having 1.60% steel+0.40% HSPE showed the highest ultimate flexure strength, correspondingly the highest energy absorption capacity. The individual fiber pull-out test curves ascertained a strong bonding between the geopolymer mortar and spiral-steel fiber.

Biography:

Mr Honey Mehra has completed his B.Tech from IIT Delhi . He is working as a Senior Technical Principal with SMEC.India In past he has worked with SNC Lavalin,SMEC,Geodata,EDF.He has been involved in detailed engineering of five underground metro stations – Azadpur,Shalimar Bagh and Netaji Subhash Place on Line 7 – Delhi Metro and Chickpet and City Market on UG1 – Bangalore Metro. He has published 2 books on structural enginnering one each in RCC and STEEL and has published papers in reputed journals like IABSE etc..

Abstract:

Underground Metro station is a very complex structure which involves numerous challenges in design as well as construction. Due to limited space in cities and the problems faced in urban transportation around the world a large no of underground metro stations have been built/ are being constructed .Noteable examples are Liverpool street in London,Chatelet – Les Halles in Paris, Fulton Street in NewYork,Shibuya in Tokyo, Changshu Road in Shanghai and Shalimar Bagh in Delhi. However the construction of underground metro station involves both temporary structures and permanent structures. Various types of temporary structures are adopted depending upon the site conditions, ease of construction and economy. Soldier piles, secant piles and diaphragm walls in combination with Waler beams and struts are the common structural systems adopted worldwide. The design of these systems typically involves the design of the piles/diaphragm walls, the struts and the waler beams. Design also depends on the construction method adopted – Bottom up or Topdown. In bottom up the station is excavated till the bottom and subsequently the permanent components of the station like undercroft ,platform ,concourse and roof slab are constructed. In top down the excavation and construction of the different slabs at various levels go on one after the another. For both topdown and bottom up construction a rigorous construction sequence is followed. The design for the piles is done using geotechnical softwares like Wallap, Deep excavation etc and for the design of waler beams and struts structural analysis softwares like STAADPro are often used. The permanent structure for the station building is a monolithic structure. A typical station can be 225m long,15m deep and 25m wide. This building has floors at different levels, side walls at the periphery and columns in the middle. Generally the size and location of the columns is also governed by architect who sometimes have requirements which the structural engineer finds hard to fulfill. The design of the permanent structure is done by using 2D X- sections at various grids of the station. The loadings include the soil fill on top, water pressure at the sides , train live loads, live loads at concourse and platform. Seismic forces were previously not considered in design since it is a buried structure. However after Kyoto earthquake where several stations in Japan suffered cracks racking force is generally taken for design of the underground stations being constructed nowadays around the world.

Biography:

Mohamed Ahmed has completed his MSc from Cairo University. He is the Head of the department of Lightweight Construction at Samigat company.

Abstract:

The construction of modern buildings requires many pipes and ducts to accommodate necessary services such as air conditioning, electricity, telephone, and computer network. Passing the required service through web openings in these beams is more desirable than passing it underneath the beams to keep of building aesthetics, also decrease the total height of building as well as decreases the total construction cost.

Many researches were prepared to investigate the effect of openings on strength and stiffness of the reinforced concrete beams under different conditions to get suitable solutions to avoid or reduce these effects. Also, this research has been prepared to study the effect of a rectangular opening on the behavior of simply-supported lightweight, mixed and normal reinforced concrete beams with rectangular cross section using a nonlinear finite element program (ANSYS 17.2).

For this purpose, a set of fifty one beams were analyzed to study the behavior of beam with opening under different conditions. All tested beams were simply supported beams with 4050 mm long, 3750 mm span, and cross section of (200 mm width and 500 mm total depth). Main parameters were: opening length (), opening height (), position of the opening along the beam axis (X), type of concrete, ultimate compressive strength () and reinforcement arrangement around opening. The wide range for these parameters was taken as follows: W= (0.42 d, 0.65 d, 0.85 d and 1.30 d), where d is the beam effective depth; h= (0.28 d, 0.45 d, 0.56 d, and 0.67 d); X= (0.50 d, 0.75 d, 1.0 d, and 1.25 d); f_cu = 21 MPa for Lightweight, 41 MPa for normal weight, and 26 MPa for mixed concrete. The reinforcement arrangement around the opening at top and bottom chord A_s1= (0.64 A_s, 0.36 A_s, 0.12 A_s and without RFT) where A_s is the main longitudinal reinforcement of the beam. Spacing between main stirrups equal to 200 mm and spacing between stirrups around opening equal to 50 mm.

Based on these conditions the study revealed that, provision of openings in lightweight reinforced concrete beams at shear zone changes the behavior of beam. The ratio of reduction in ultimate load increased from 8% to 23%, when the ratio of opening depth to beam effective depth (h⁄d) increased from (0.28 to 0.67). While it increased from 5% to 18%, when the opening length to beam effective depth ratio (W⁄d) increased from 0.42 to 1.30. The effect of opening location becomes more significant when opening is located close to support or at a distance equals to half beam depth. When the opening is located at a distance equal to half beam depth, the cracking load and the ultimate load were reduced by 16%, and 13%, respectively. Also, when the opening is located at a distance equals to beam depth, the cracking load and the ultimate loads were reduced by only 9%, and 7%, respectively. Increasing the ultimate compressive strength from 21 to 41 MPa decreases deflection and increases cracking and ultimate loads by 36%, 33%, and 37%, respectively. In addition to, increasing the reinforcement around the opening with certain arrangement helps to recover the loss in ultimate load of beam with openings.

Biography:

Abstract:

Composite steel-concrete beams have been widely used in the design and construction of modern steel framed buildings. A steel-concrete structural beam consists of a steel structure as the major and concrete as the minor part. It can be achieved by a steel beam overlaid by a concrete slab, in which the connection between steel and concrete is achieved by using mechanical shear connectors (shear studs). Several methods have been introduced to construct steel-concrete composite beams as shown in figure 1 (Uy, 2007). The idea of composite sections refers to the development of shear connectors in the 1950’s which has made practicable to connect the concrete slabs to the steel beams (Johnson, 1994). Rae et al., 2011 conduct a study to examine the steel-concrete composite structural frames. Dubai (2007) finds experimentally that shear connectors can be used partially in composite structural beams. Indeed, the composite steel-concrete structural beams should be studied under diverse loading conditions. For analyzing the composite beams under combined bending and shear stress there are not adequate references; even codes and standards do not cover this issue adequately (Liang et al., 2004).

There is no doubt that concrete is strong enough in compression and steel in tension. However, regarding the composite steel-concrete beams, in the sagging moment locations where the steel is subjected to compression and concrete subjected to tension, it needs to be investigated conservatively.

Mainly, this research investigates the behavior of continuous or semi-continuous beam at the negative moment locations. The loading condition of combined bending and shear will be covered. This work tries to investigate the problem numerically (Finite Element Method) using the computer software ANSYS, and the results will be compared with existing experimental data. FE models will be constructed to investigate the reliability of the simulation of composite steel-concrete structural beams.

Biography:

Iraj H.P. Mamaghani is an Associate Professor of Civil Engineering at University of North Dakota. He received his B.Sc. in Civil Engineering from Istanbul Technical University with Honors in 1989. He continued his Master and PhD studies at University of Nagoya, Japan, where he obtained his Master and Doctor of Engineering degrees in Civil Engineering. Dr. Mamaghani has published over 150 papers in professional journals and conference proceedings.

Abstract:

This paper deals with the hysteretic behavior, analysis and stability evaluation of thin-walled steel tubular columns subjected to cyclic multiaxial (axial and bidirectional lateral) loading. Steel columns are very useful in highway bridge pier construction as it offers flexible space requirement and provides speedy construction. Behavior of steel columns under earthquake-induced loads is rather complicated as earthquakes occur in an oblique direction. However, modern seismic design philosophies have been based on the behavior of structures under independent actions of uni-directional loading in orthogonal directions. In this study, inelastic cyclic behavior of steel columns subjected to axial force together with simultaneous bi-directional cyclic lateral loads is investigated using an advanced finite element analyses procedure. Several types of linear and non-linear idealized loading patterns are employed to check the strength and ductility. The effects of important structural parameters and loading history on the behavior of thin-walled steel tubular columns are examined using the proposed procedure. The obtained results from this study confirm the importance of considering behavior of steel columns under multiaxial loading. The multiaxial tests and finite element analysis results showed that the behavior of a tubular column under multiaxial loading becomes complex and exhibits a circular trajectory once local buckling occurs. The local buckling bulge in the multiaxial loading case tends to develop monotonically due to the circular trajectory. As a result, the residual deformation becomes larger. On the contrary, the unidirectional loading test and analysis are likely to underestimate the damage and the residual displacements caused by an earthquake. It is concluded that the effects of multiaxial loading should be considered in ductility evaluation and seismic resistance design of steel structures.

Biography:

The author acknowledges the significant contribution of Prof. Metin I. Yaras, Chair Mechanical and Aerospace Engineering, Carleton University, Ottawa Canada, for the research expertise and advise regarding the current project. The author also acknowledges the contribution of Carleton University, Ottawa Canada for providing the computational resources used

Abstract:

Finite element analyses were performed to investigate the leakage and structural integrity of the bolted flange joint assembly (BFJA) and Grayloc® clamp connector (GCC), when each assembly was subjected to the external loads of bolt preload, internal pressure and thermal loadings. The thermal loadings were of both spatially-uniform and spatiallynonuniform temperatures on the assemblies. The initial bolt preload applied on the BFJA and the GCC was 60,000 N and 6,000 N, respectively. The internal pressure for both assemblies was 27 MPa. The BFJA was found to have satisfactory leakage and structural performance for the thermal loadings expected on the low-temperature (260°C) side of the Carleton Supercritical Water (CSCW) loop. The GCC was found to have satisfactory leakage and structural performance for the thermal loadings expected on the hightemperature (600°C) side of the CSCW loop. The leakage integrity of the GCC was found to remain intact for a temperature difference of 15°C between the inner and outer surfaces of the flange. This was not the case for a temperature difference of 100°C.

Biography:

V.Prabhu is completing his PhD from Hindustan Institute of Technology and Science(Deemed to be University). He is the Assistant Professor of the department of Civil, a premier research organization. He has published more than 2 papers in reputed journals . The journal papers are respectively Behavior of Steel Fiber Reinforced Concrete Beam using Fly ash, IJCIET(2018), Utilization of Waste Plastics and Carbon Rubber in Bitumen, IJETER, Volume4, Issue 5, May (2016), Factors Influencing Time and Cost Overruns in Construction Projects, IJIRSET, Vol.5, Issue 4, April 2016.

Abstract:

Civil infra-structural designs now need a new dimension, different from conventional strength and reliability approaches in that they are less energy intensive and ecologically sustainable. This brought in the use of other materials and admixtures into concrete preparation and in this study, role  of flyash and nylon fibres for replacing cement and improving performance in terms of stiffness and flexibility is shown with testing and design emphasis. Beams with normal concrete, termed as CC, with flyash termed as CCF and with flyash and nylon fibres CCFN are cast and tested for performance under service, ultimate and failure conditions and results clearly indicate improvements in rotational flexibility at ultimate and failure conditions. Compressive strength enhancements are shown in Fig.1, while load deflection characteristics of beams tested are shown in Fig.2. Using these as bases, section designs are made with less energy and more eco-friendly properties for the required ultimate or service load, resulting in 15 to 20% savings and carbon emission.

Biography:

Hamed Rahman Shokrgozar has completed his PhD from K.N.Toosi University of Technology. He is the assistant professor of the department of civil engineering at university of Mohaghegh Ardabili. He has published more than 10 papers in reputed journals and more than 30 papers in conferences.
 

Abstract:

Soil-structure interaction expresses the difference of structural responses between the actual and theoretical rigid based conditions, and depends on the stiffness, mass and damping of soil and structure systems. Nowadays, moment-resisting frame is one the most common structural systems. Ductility of these frames is due to the flexural yielding of beams, columns and the shear yielding of panel zone of columns. The influence of modeling beam-column connections and soil-foundation-structure interaction on the seismic responses of 10-story intermediate steel moment-resisting frames that located on the two various soil types (II and IV) is studied in this paper. Prequalified welded flange plate connections (WFP) are used in these buildings. For this purpose, several 2D finite element models are developed using OpenSees software by assuming three conditions such as models with considering soil and beam-column connections effects, models with considering soil and without connections, models with fixed based and without considering connections. The maximum responses of the studied frames are calculated and compared with nonlinear time-history dynamic analyses under seven far-fault earthquakes. The numerical results show that in the models located on soil type IV, considered connections, SFSI, or just soil, the maximum lateral displacement and maximum inter-story drift are more, compare to models without connections and with fixed based conditions. In the models rested on soil type II, some of these parameters are reduced. The maximum base shear of structures is reduced in the mentioned models.

Biography:

Abstract:

The current research addresses Screen Grid ICF RC walls, an innovative system that combines structural strength and sustainability. The system however is still developing with relatively few researches and yet not acknowledged by several design codes. The aim of this work is to further evaluate the structural behavior of SGICF walls. Results of this research may lead to introducing new design guidelines. To accomplish this, a test program was prepared and performed.

The test program consisted of six walls that were divided into two sets. The first set was tested under combined axial and lateral monotonic load and the second set was tested under combined axial and cyclic lateral load. Each set consisted of three walls; a wall without openings, one with a window opening and the other with a door openings. The configuration and reinforcement of the walls in the two sets were similar.

This part of the research aims at understanding the effect of seismic loading on SGICF walls. Accordingly, a cyclic loading experimental program was performed to simulate earthquake action. Results of the cyclic loading test program indicated the energy dissipation capacity of the tested walls as well as their stiffness degradation under this type of loading. The aim of the monotonic loading experimental program was to act as control specimens to evaluate the effect of cyclic loading. 

The test showed the cracking pattern, lateral load resisting capacity, energy dissipation and stiffness degradation of the different walls under the two types of loading. These results may be very useful for the design of SGICF walls under seismic loads.

Biography:

Seung-Hun, Sung has completed his PhD from KAIST. He is the Senior Researcher of the Agency for Defense Develeopment, South Korea. He has published more than 10 papers in reputed journals.

Abstract:

This study proposes a novel cumulative damage assessment method for a reinforced concrete (RC) slab using an equivalent single degree of freedom (SDOF) model. The proposed method utilizes a structural permanent deformation evaluted from the equivalent SDOF model and its newly constructed resistance function due to initial damage. In order to confirm an applicability and a limitation of the proposed method, a series of numerical simulations and experiments were carreid out. Three consecutive explosions were numerically and experimentally conducted at same detonation points with the same explosive weight for the one-way RC slab and for the two-way RC slab. As a result of comparison between numerical simulaions and experiments, it is sufficiently applicable to assess cumulative damages for a RC slab under blast loads, although the method has some limitation.

Biography:

Zhang YiNing has finished her undergraduate course of Business Administration in City University Of Macau. Now she is a PGR student major in MRes Sustainable Building Technology in The University of Nottingham Ningbo China.

Abstract:

The practical application of Chinese traditional geomantic omen theory in Building Information Modelling: My topic is Chinese Traditional geomantic omen's new digital uses in Building Information Modelling. Chinese Traditional geomantic omen is a subject which related on Chinese geography from ancient times. The main theme about my article will base on Development of design and modelling methods. The primary purpose of this study paper was to establish a conception which Chinese traditional geomantic omens could be used in BIM. The object (aim) of this study (the present research ) was to design a digital compass in BIM software and achieve rational distribution in AEC projects.

In order to determine the feasibility of this kind of technology application，we carried out a pilot study about geomantic omen's history in China also market in the world. To evaluate the importance to contemporary building fields，the construction geomancy study enjoys the lofty status in the Chinese history of architecture. 0To describe the origin textbook of Geomantic omen，which called “The Books Of Changes ( I Ching ) ” ，the ancient book is a study of change in human life. The belief is that understanding the pattern and cycle of change will prepare the person for future events and help with making right decisions.

This paper will describe a new creative attempt which combine BIM technology and Chinese traditional geomantic omen，which similar to astrology in western.  In addition，in this paper，I will explain what is Chinese Traditional geomantic omen and prove geomantic omen's scientificty in academic research. 

Biography:

Osmani is a state engineer in civil engineering since 2008, engineering’s option road and bridges. Then I had my magister diploma since 2012, a diploma in post-graduation in civil engineering, Mechanics and Structural Stability option, subject magister was on the study of the behavior of steel and composite steel - concrete beams with openings in the web, the subject was an analytical and numerical study using the software Castem. Currently I am a PHD student in civil engineering, option structures and materials, my doctoral thesis is the study of the instability of steel slender beams, I’m making an analytical and numerical studies using the Abaqus software.

Abstract:

This work deals with the effect of shear deformation on the lateral buckling elastic of tapred thin  thin-walled beams. However, a nonlinear geometric beam theory is presented according to a new kinematic model that takes into account the components of shear deformations. Ritz's method is applied to obtain equilibrium equations, then the buckling loads are evaluated by solving the eigenvalue problem by requiring the singularity of the tangential stiffness matrix. The elastic lateral buckling resistances given by the proposed method are generally in good agreement with the finite element simulation using Abaqus software and other available numerical simulations.

Biography:

Ming-Hsiang Shih received his Dr.-Ing. in Institute of Mechanics and Constructions from Rheinisch-Westfällische Technische Hochschule Aachen, Germany. Currently, he is a Distinguished Professor in Department of Civil Engineering, National Chi Nan University, Taiwan. His current research interests include Structural Control, Semi-Active Damper and Isolation, Dynamic Testing, Application of Digital Image to Measurement, On-Line Monitoring, Experimental Biomechanics, Numerical Methods, Finite Element Method, Nonlinear Model, Computer aided Monitoring and Control and Green Engineering.

Wen-Pei Sung is received his Ph.D. degrees in civil engineering from National Chung Hsing University, Taiwan. He is also a registered professional engineer in Taiwan. In 1992, he became a faculty member of National Chin-Yi University of Technology (NCUT). Currently, he is a Distinguished Professor and Dean at College of Humanities and Creativity, NCUT. His current research interests include Structural Control, Application of Digital Image correction and Green Engineering.    
 

Abstract:

Every year, many natural disasters strike Taiwan, destroying bridges and disrupting traffic. To allow shipping of relief provisions and salvage, fabricated steel bridges are often used to construct emergency relief bridges. This kind of bridge must meet strength and functionality requirements. Strength depends on the materials used, while functionality depends on displacement control. These two requirements affect the section design of the bridge deck. In order to quickly build a light-weight bridge for emergency relief with displacement control, a neutral equilibrium mechanism is proposed and developed to control the deflection of an emergency relief bridge. A neutral equilibrium mechanism is a system with an internal control mechanism that can actively change the internal structure. Structural transformation causes the size variation of the action force to respond to continuous changes in bridge deflection. This mechanism can expand the effective span of the bridge, maintain its strength and functionality, and increase the convenience of building and mobility. Experimental results reveal that a virtual pier at the center of a bridge with this proposed mechanism installed can control vertical deflection caused by vehicles carrying heavy loads. Test and analysis records also reveal that the vertical displacement at the center of a bridge with the neutral equilibrium mechanism installed is close to zero. The practicality of this neutral equilibrium mechanism has been verified by experiment.

Biography:

Abstract:

Water found on earth in different quantities, forms and places is used for different purposes. Water in its natural form does not exist in sufficient quantities for its diverse uses. Dams play overarching roles in water resources development through collection of the water in sizeable quantities for its effective utilization for single- or multi-purpose water resources projects. This work presents the use of dam for water supply, irrigation, flood control, hydro power development, recreation, sanitation, navigation, and so on. Sedimentation data were obtained for a typical dam reservoir. Sedimentation rate, trap efficiency of the reservoir and other variables were determined and analyzed. The results showed that sedimentation depletes the storage capacity of reservoirs, and if not controlled will reduce the life of the reservoir and its benefits. Discussed are benefits and negative impacts of dams. Dam disaster was also brought into focus in view of its catastrophic nature, resulting to loss of lives, farmlands and properties. Dam reservoir facilities should be maintained after construction to protect against rapid siltation of the reservoir and end of the benefits.

Biography:

Hong Jae Yim has completed his PhD from Korea Advanced Institute of Science and Technology (KAIST). He is the professor of the department of construction and disaster prevention Eng in Kyungpook National University. He has published more than 25 papers in reputed journals.
 

Abstract:

The development of various non-destructive measurements involves study on the microstructure evolution of cement-based materials. Electrical resistivity measurement is a method that can monitor microstructure evolution due to change in resistivity through hydration products by filling pore space. This study aims to measure electrical resistivity in order to investigate an affect of various environmental condition. A same mix-proportion mortar sample are prepared to study the effect of curing various temperature and various humidty. As a result, the rising time, which is the onset of an increase in electrical resistivity, is shorten and the increasing ratio of electrical resistivity is increased at higher curing temperature, but various humidity are not significant effect.

Biography:

Lei Hui is doing his PhD from Universitat Politecnica de Catalunya. He is the PH.D of the program of CONSTRUCTION OF ENGINEERING, a premier research program. He has got Chinese governmental scholarship, and Spanish governmental scholarship and has been publishing 4 Chinese core articles and 1 international journals, 1 international conferences so far. He is a member of ACI 544 associate committee members

Abstract:

Drying shrinkage due to capillary tension in porous pores has been proven to affect structural behaviour of concrete. Thus, this paper focuses on drying shrinkage of 3D-printed fiber-reinforced concrete (3D-printed FRC). The specimens consisted of two groups fabricated by 3D printer for characterization and with minimal friction of steel fiber in the concrete. One group was used for the compression strength test. The other group was used for drying shrinkage tests in a curing chamber with constant conditions over 60 days. The comparison of expected results and FIB model concrete 2010 suggest that porous structure effects of 3D-printed fiber-reinforced concrete (3D-printed FRC) should be considered. Thus, optimizing cement concrete matrix is necessary in proposing coefficients in moisture diffusion formulations.

Biography:

Youssef Ibrahim has completed his Bachelor degree from Alexandria University. He is a postgraduate student at Department of Building and construction, College of Engineering and Technology, The Arab Academy for Science, Technology & Maritime Transport in Egypt. He works as a technical office Engineer in Petrojet in Egypt. 

Abstract:

Earthquake is one of the most catastrophic events, which makes enormous harm to properties and human lives. As a piece of a safe building configuration, r.c walls are given in structures to decrease horizontal displacements under seismic load. Shear walls are additionally used to oppose the horizontal loads that might be incited by the impact of wind.

R.C walls in residential buildings might have openings that are required for windows in outside walls or for doors in inside walls or different states of openings due to architectural purposes. The size, position, and area of openings may fluctuate from an engineering perspective.

Shear walls can encounter harm around corners of entryways and windows because of advancement of stress concentration under the impact of vertical or horizontal loads. The openings cause a diminishing in shear wall capacity. It might have an unfavorable impact on the stiffness of r.c wall and on the seismic reaction of structures.

By using ANSYS, Finite element modeling approach has been conducted to study the effect of opening shape, size and position in RC wall with different thicknesses under axial & lateral static loads.

The proposed F.E approach has been verified with experimental programme conducted by the researchers and validated by their variables. A very good correlation has been observed between the model and experimental results including load capacity, failure mode and lateral displacement.

A parametric study is applied to investigate the effect of opening size, shape, position on different R.C wall thicknesses.

Biography:

Master's degree in civil engineering from the Federal University of Rio Grande do Norte (2015), currently holds a PhD in Geotechnics at the University of Brasília. He is a professor at the Federal Institute of Education, Science and Technology of Goiás. He has experience in Civil Engineering, with emphasis on Environmental Geotechnics, Applied Geotechnics for Mining and Pavement, mainly in the following areas: tailings dams, stability, laboratory tests , geotechnical and technological characterization of soils, industrial and mining residues, recycling and reuse of waste and management of pavements. He has published several national and international works around the world.

Abstract:

Mining in Brazil plays a fundamental role in the economic and social development of the country, contributing directly to the improvement of the population's life. However, the mining activity may cause harm to the environment. In this context, it is appropriate to highlight the visual pollution caused by the storage of waste in the open. Among the various alternative ways of mitigating the environmental impacts caused by mining is the use of waste from mineral extraction activities in Civil Engineering works, especially those related to the construction of landfills, by using large volumes of material. The application in layers that will compose pavement structures of the highways is, therefore, among the options of great viability for application of mining residues. However, the geotechnical properties of these materials need to be investigated, even when mixed with natural soils. From these aspects, the present research proposes a feasibility study of the waste from the beneficiation of the iron ore, due to the mining activity in the municipality of Jucurutu, in the state of Rio Grande do Norte - Brazil, where the mechanical behavior of the material, by means of geotechnical laboratory and field tests. The iron ore residues were stabilized with a granular soil from the region, which has been used by the municipality of Jucurutu-RN in the construction of roads. According to the results obtained the residue from the processing of iron ore has technical and economic feasibility to be used in road works.

Biography:

Abstract:

Guidance has been provided in NBC 2016 Part 11 'Approach to sustainability'. for making buildings and built environment energy efficient and environmentally compatible. In article 9.2.1.8 it is stated that Bamboo can contribute to sustainable development. Further it is stated that " as a building material, it had been abundantly used in the country for traditional huts and hermitages for long besides as scaffolds. With the understanding of its physical and mechanical properties, it has been recognized as an engineering material with scope of buildings and structures to sustain among others the lateral forces including earthquake forces,etc. Bamboo can be used as structural material in buildings. Bamboo structure shall be designed in accordance with Part6 Structural design, Section 3B Bamboo.Raw bamboo has been used as a structural material for centuries. Traditionally, the bamboo pole is used intact and tethered to adjacent poles to create a structure. The most significant advantage bamboo has over timber is found in its structural properties. All allowable stresses except for compression parallel to the grain are greater for raw bamboo than those of most wood species. This information indicates that raw bamboo poles are a good material for beams, but not necessarily for columns. If bamboo is laminated to form structural components, the material properties become significantly better than those of laminated wood. Laminated bamboo(LBL) is ten times stringer in tension and six times stronger in compression and flexure than laminated timber(LVL).and yet, laminated bamboo is only recently becoming a material of interest to designers. Other advantages of LBL are that it has 15% less embodied energy in processing than wood and is 20% more stable than wood in moisture and temperature changes. The code is silent on structural design using Laminated Bamboo structural components. Modular design, Pre frabricated unit and assembled at site , afordable housing unit with ECO aspects is a successful venture to be adopted in India.The building code shall be strengthned with sufficient design data and construction techniques and skill guidens.

Biography:

Hamad Alduaij has completed his Bsc in electrical engineering from Kuwait university, and is working in Kuwait institute for scientific research as a research assistant in the energy and building program.

Abstract:

Reinforced Concrete (RC) is the most widely used material in beams and columns of buildings, bridges and other infrastructures. Behavior of RC beam is a well examined and explained by several laboratory experiments. RC material is highly nonlinear and mathematically complex to model. Finite element analysis is employed by engineers and researchers to predict the nonlinear behavior of RC columns and beams along with laboratory experiments. However, the method, in general, computationally expensive for RC beams and columns due to convergence and other issues. Artificial intelligence techniques such as neural networks can be used to obtain a relatively simple mathematical model describing the behavior of RC beam.

RC beam with a vertical hole is not a well examined subject and it is even more complex to predict using finite element model. To carry out laboratory experiments with various position of the hole along the length and width of the beam and size of the hole is a laborious and expensive task. In the present study, the characteristics of a RC beam with a vertical hole is examined through the use of Artificial Neural Networks (ANN). In this study, limited number of laboratory experimental and finite element results are used to predict the behavior of RC beam with a vertical hole using ANN. Effect of hole with various position along the length and width of the beam and due to change of size of the hole. The analysis was created with a hidden layer of 15 neurons using Bayesian regularization backpropagation algorithm. Bayesian regularization minimizes a linear combination of squared errors and weights. It also modifies the linear combination so that at the end of training the resulting network has good generalization qualities. The network achieved almost 1 r-squared value for both training and testing set. Figure 1 depicts neural network model of the maximum force as the hole moves through the x axis.From the network simulation It was observed that, beam hole near the mid span reduces the load carrying capacity by 20 %. The optimal location of the vertical hole in between the end support and mid span. There is drastic reduction in load carrying capacity is observed if the edge distance between circumference of the hole and beam edge is less than 30 mm.     

Biography:

Abstract:

This $33 million patching and resurfacing project encompassed more than 100 lane-miles of interstate expressway and related construction work, including bridge deck and joint repairs, drainage improvements, vegetation management, fiber optic installation, and enhancements to the intelligent transportation system. Challenges faced during construction included a demanding completion date, restricted work hours, high traffic volumes, and staging construction through seven full interchanges, including the interstate-to-interstate interchange with I-355. Precise layout of longitudinal paving joints was critical to the proper placement of longitudinal joint sealant and inlaid pavement markings, further adding to the engineering complexity of the construction project. This presentation will demonstrate how innovative practices and applied technology, including mobile LiDAR data with calibrated imagery, GPS measurement and layout, 3D modeling, and high-definition video, were used to respond to challenges faced in the field to complete the project on time and under budget, with considerable improvements to quality and efficiency over traditional methods, while at the same time improving safety and minimizing inconvenience to the motoring public.

Biography:

Jrad Wassim, second year PhD student from Lorraine University. He is a member in researsh team MMSV-Laboratoire LEM3-Technopole-Metz, a premier research laboratory. He has a Master’s degree in conservation and consolidation of historical structures and Master degree in civil engineering. He has experience in consultancy and design of many projects: residential buildings, schools, and warehouses.

Abstract:

We investigate the vibration of thin-walled beams with arbitrary open cross section shape. Based on beam element model accounting for warping and flexural torsional coupling, analytical solutions are derived for higher free vibration modes in bending, torsion and flexuraltorsional coupled modes. In the model, the effects of rotational inertial kinematic terms are included. The finite element approach of the model is also investigated. For this aim, 3D beams with 7 seven degree of freedom per node are adopted. The model is validated by comparison to benchmark solutions found in literature where numerical and recent experimental results are considered. Compared to classical models where rotational terms are neglected, more accurate results are obtained with the present model.

Biography:

Mahdi Adibi has completed his PhD from University of Tehran in Iran. He is the Head of the department of Structural Engineering at University of Bojnord, a premier research organization. 

Abstract:

Vulnerability of concrete beam-column joints reinforced by plain bars is one of the most usual damage modes during earthquakes between a large number of old buildings before the mid-1970s, that caused by either diagonal shear cracks or intersectional cracks. Diagonal cracks at the panel zone of the joint caused by shear resistance of the joint and intersectional crack caused by bar slippage.

In this study, a relatively simple and efficient nonlinear model is proposed to simulate pre- and post-elastic behavior of the joints which fail under bar slippage mode. In this model, beam and column components are represented by linear elastic elements, dimensions of the joint panel are defined by rigid elements, and effect of slip is taken into account by a nonlinear rotational spring at the end of beam. The proposed method is validated by experimental results for both internal and external joints

Biography:

Iraj H.P. Mamaghani is an Associate Professor of Civil Engineering at University of North Dakota. He received his B.Sc. in Civil Engineering from Istanbul Technical University with Honors in 1989. He continued his Master and PhD studies at University of Nagoya, Japan, where he obtained his Master and Doctor of Engineering degrees in Civil Engineering. Dr. Mamaghani has published over 150 papers in professional journals and conference proceedings.

Abstract:

This paper deals with the hysteretic behavior, analysis and stability evaluation of thin-walled steel tubular columns subjected to cyclic multiaxial (axial and bidirectional lateral) loading. Steel columns are very useful in highway bridge pier construction as it offers flexible space requirement and provides speedy construction. Behavior of steel columns under earthquake-induced loads is rather complicated as earthquakes occur in an oblique direction. However, modern seismic design philosophies have been based on the behavior of structures under independent actions of uni-directional loading in orthogonal directions. In this study, inelastic cyclic behavior of steel columns subjected to axial force together with simultaneous bi-directional cyclic lateral loads is investigated using an advanced finite element analyses procedure. Several types of linear and non-linear idealized loading patterns are employed to check the strength and ductility. The effects of important structural parameters and loading history on the behavior of thin-walled steel tubular columns are examined using the proposed procedure. The obtained results from this study confirm the importance of considering behavior of steel columns under multiaxial loading. The multiaxial tests and finite element analysis results showed that the behavior of a tubular column under multiaxial loading becomes complex and exhibits a circular trajectory once local buckling occurs. The local buckling bulge in the multiaxial loading case tends to develop monotonically due to the circular trajectory. As a result, the residual deformation becomes larger. On the contrary, the unidirectional loading test and analysis are likely to underestimate the damage and the residual displacements caused by an earthquake. It is concluded that the effects of multiaxial loading should be considered in ductility evaluation and seismic resistance design of steel structures.

Biography:

Mr Honey Mehra has completed his B.Tech from IIT Delhi . He is working as a Senior Technical Principal with SMEC.India In past he has worked with SNC Lavalin,SMEC,Geodata,EDF.He has been involved in detailed engineering of five underground metro stations – Azadpur,Shalimar Bagh and Netaji Subhash Place on Line 7 – Delhi Metro and Chickpet and City Market on UG1 – Bangalore Metro. He has published 2 books on structural enginnering one each in RCC and STEEL and has published papers in reputed journals like IABSE etc..

Abstract:

Underground Metro station is a very complex structure which involves numerous challenges in design as well as construction. Due to limited space in cities and the problems faced in urban transportation around the world a large no of underground metro stations have been built/ are being constructed .Noteable examples are Liverpool street in London,Chatelet – Les Halles in Paris, Fulton Street in NewYork,Shibuya in Tokyo, Changshu Road in Shanghai and Shalimar Bagh in Delhi. However the construction of underground metro station involves both temporary structures and permanent structures. Various types of temporary structures are adopted depending upon the site conditions, ease of construction and economy. Soldier piles, secant piles and diaphragm walls in combination with Waler beams and struts are the common structural systems adopted worldwide. The design of these systems typically involves the design of the piles/diaphragm walls, the struts and the waler beams. Design also depends on the construction method adopted – Bottom up or Topdown. In bottom up the station is excavated till the bottom and subsequently the permanent components of the station like undercroft ,platform ,concourse and roof slab are constructed. In top down the excavation and construction of the different slabs at various levels go on one after the another. For both topdown and bottom up construction a rigorous construction sequence is followed. The design for the piles is done using geotechnical softwares like Wallap, Deep excavation etc and for the design of waler beams and struts structural analysis softwares like STAADPro are often used. The permanent structure for the station building is a monolithic structure. A typical station can be 225m long,15m deep and 25m wide. This building has floors at different levels, side walls at the periphery and columns in the middle. Generally the size and location of the columns is also governed by architect who sometimes have requirements which the structural engineer finds hard to fulfill. The design of the permanent structure is done by using 2D X- sections at various grids of the station. The loadings include the soil fill on top, water pressure at the sides , train live loads, live loads at concourse and platform. Seismic forces were previously not considered in design since it is a buried structure. However after Kyoto earthquake where several stations in Japan suffered cracks racking force is generally taken for design of the underground stations being constructed nowadays around the world.

Biography:

Mohamed Ahmed has completed his MSc from Cairo University. He is the Head of the department of Lightweight Construction at Samigat company.

Abstract:

The construction of modern buildings requires many pipes and ducts to accommodate necessary services such as air conditioning, electricity, telephone, and computer network. Passing the required service through web openings in these beams is more desirable than passing it underneath the beams to keep of building aesthetics, also decrease the total height of building as well as decreases the total construction cost.

Many researches were prepared to investigate the effect of openings on strength and stiffness of the reinforced concrete beams under different conditions to get suitable solutions to avoid or reduce these effects. Also, this research has been prepared to study the effect of a rectangular opening on the behavior of simply-supported lightweight, mixed and normal reinforced concrete beams with rectangular cross section using a nonlinear finite element program (ANSYS 17.2).

For this purpose, a set of fifty one beams were analyzed to study the behavior of beam with opening under different conditions. All tested beams were simply supported beams with 4050 mm long, 3750 mm span, and cross section of (200 mm width and 500 mm total depth). Main parameters were: opening length (), opening height (), position of the opening along the beam axis (X), type of concrete, ultimate compressive strength () and reinforcement arrangement around opening. The wide range for these parameters was taken as follows: W= (0.42 d, 0.65 d, 0.85 d and 1.30 d), where d is the beam effective depth; h= (0.28 d, 0.45 d, 0.56 d, and 0.67 d); X= (0.50 d, 0.75 d, 1.0 d, and 1.25 d); f_cu = 21 MPa for Lightweight, 41 MPa for normal weight, and 26 MPa for mixed concrete. The reinforcement arrangement around the opening at top and bottom chord A_s1= (0.64 A_s, 0.36 A_s, 0.12 A_s and without RFT) where A_s is the main longitudinal reinforcement of the beam. Spacing between main stirrups equal to 200 mm and spacing between stirrups around opening equal to 50 mm.

Based on these conditions the study revealed that, provision of openings in lightweight reinforced concrete beams at shear zone changes the behavior of beam. The ratio of reduction in ultimate load increased from 8% to 23%, when the ratio of opening depth to beam effective depth (h⁄d) increased from (0.28 to 0.67). While it increased from 5% to 18%, when the opening length to beam effective depth ratio (W⁄d) increased from 0.42 to 1.30. The effect of opening location becomes more significant when opening is located close to support or at a distance equals to half beam depth. When the opening is located at a distance equal to half beam depth, the cracking load and the ultimate load were reduced by 16%, and 13%, respectively. Also, when the opening is located at a distance equals to beam depth, the cracking load and the ultimate loads were reduced by only 9%, and 7%, respectively. Increasing the ultimate compressive strength from 21 to 41 MPa decreases deflection and increases cracking and ultimate loads by 36%, 33%, and 37%, respectively. In addition to, increasing the reinforcement around the opening with certain arrangement helps to recover the loss in ultimate load of beam with openings.

Biography:

Cecos University of Emerging Science & Technology Peshawar, Pakistan

Abstract:

Granite industry produce huge amount of waste material during cutting, mining and polishing stage. These wastes are dumped on the open field/land which creates lot of environmental problem as well as health problems. Therefore it is necessary to utilize this waste material as a construction material in concrete industry. In this research work, the experimental investigation carried out is to examine the feasibility of use of granite waste as a coarse aggregate in concrete. Five types of mixes are prepared with constant quantities of fine aggregate, cement and water, but natural coarse aggregate are replaced with granite waste at different percentages 0%, 20%, 40%, 60%, 80% by weight of concrete. The water-cement ratio of 0.57 was kept constant for all mixes. From the test results it was observed that the workability, compressive and flexure strength were increased. Compressive strength of concrete Mixes increased up to 20%, 40%, and 60% of granite compressive strength increase as +0.16%, 13.29%, and 29.14% at 28 days compressive strength respectively. Compressive strength decreased beyond 60% granite as coarse aggregate. For 80% granite strength decrease -7.46%. Flexural strength increased at 20% granite as +3.32%, flexural strength reduces beyond 20% granite, flexural strength at 40%, 60% and 80% of granite is -4.83%, -25.91% and -28.77% respectively.