Biography:

Jan Barnat has completed his PhD at the age of 29 years from Brno University of Technology. He is the junior researcher at Brno University of Technology and the AdMaS Research Centre.

Abstract:

The analysis presented in this paper deals with some selected problems of special use of bonded anchors. One of the  problem is the limit of bond strength provided by the adhesive, which is important parameter especially for use in high performance concrete.

The tension resistance of bonded anchor can be limited by all materials used in anchoring system. When the steel anchor is installed in concrete of strength above 60 MPa together with common anchoring length, then the bond strength performed by the adhesive can be the most limiting factor of the anchor resistance. Therefore, it is necessary to study the real behavior of the thin layer of adhesive and find the way how to improve the adhesive characteristics. 

The first part of the contribution discusses the design approaches used in codes for the bond failure type. The influence of concrete and adhesive performance is closely described in related references.

All experiments presented in this paper were focused on the bond strength value. In case, when the adhesive is the resistance limiting material in the system, then the bond strength can be defined only as an adhesive shear strength. Therefore when the main goal is to study adhesive characteristics. The concrete can be excluded from the analysis. The special steel specimen, which is effective for the testing of this shear strength, was designed. The design of this specimen is presented in this paper as well as the problem of the testing of adhesive itself.

 Designed mixtures of high performance epoxy resins and vinyl ester resins are tested and the results are presented. The effect of additives as milled limestone and also milled FRP reinforcement are also analyzed.

Biography:

Sajad Hamedi Shahraki has completed his MSc in Civil Engineering at Azad University, Tehran, Iran, in 2013. He is currently pursuing his PhD in Civil Engineering in Azad University. At the moment, in cooperation with MSCo., he is working on projects about performance of steel structures when using low-yield-point steel instead of common steel grades. The results of the analysis demonstrated that the use of low-yield-point steel is more efficient and economical than steel grades which are being used currently in earthquake-resistant systems. He has published more than five papers in accredited journals and also, a book on earthquake risk analysis.

Abstract:

Laboratory methods are always the most reliable and important methods for studying the seismic performance of under-load structures. The increase in steel strength is not always a desired and beneficial property, as in some structures the strength is reduced as much as possible in order to meet the required flexibility. In structures, in which the imposed energy is to be absorbed by non-linear behavior, it’s suggested to use low-yield or easy-going steel known as EGS 100 or Y.P 100 in abbreviation. Proving the theory of the use of low-yield-point steel in lateral load resisting systems, several experiments were conducted around the world among which the most important one carried out on the seismic performance of cross-linked bracing systems, which is discussed in this paper. In this paper, three samples were tested to evaluate the effects of low-yield-point steel on the lateral load resisting systems in cross-linked bracing method. The object of these experiments was mainly to investigate the idea of using more flexible steel to improve the behavior of cross-linked bracing systems. Research results show that the use of mild steel makes it possible to devise design methods to improve steel behavior in structures. These findings also show that the use of mild steel increases the shear stiffness, energy absorption and structural stability with a variety of earthquake resistant systems, such as bracing, steel shear walls, and so on. In addition, it provides an opportunity for better direction of earthquake forces to parts of the structure which absorb and nullify energy.

Biography:

Harison Warah Che is passionate about Engineering, safety, good living philosophies, environmental sustainability, research theories and methodologies, tapped from years of studies in the University of Buea, Cameroon and many adventures travelling and meeting amazing people. While working in the organizations in Cameroon his country of Birth, he learned what it means to approach construction engineering with the mindset of a safety and environmental sustainability and while working at the USA Army Camp in Kandahar Afghanistan he respect, understand and appreciate the engineering that underlie any particular construction.

Abstract:

This paper is based on the research work that is concerned with improvement of the process of design for construction. It is generally accepted that the quality and hence the value of a project is largely decided during the design, particularly at the early design stages. Management of this is the most important aspect of construction has not received due attention yet, particularly in the developing economies. It is in this context, the authors have worked on devising an improved design process map for day to day use in organizations dealing with building design projects. The current design processes in selected Small and Medium Enterprises (SMEs) engaged in building consultancy in the Middle East and India were explored in this study and the design processes adopted by the organizations were mapped. A generalized current process map was then prepared. A number of areas could be identified in the early stages of design development, which could lead to downstream problems. Based on the findings from the study, the authors have developed an improved Building Design Process Map (BDPM) with an associated Schematic Design Model (SDM). The new process map is easily implemented by designers without the need for rigorous training in the methodologies employed.

Biography:

Firaol C has completed his BSc from Addis Ababa University. He is currently a Junior Dam Engineer in Ethiopia in a company named Yerer Engineering PLC. He has been teaching different design software’s like ETABS, SAP, Inroads, Eagle Point and GeoStudio in different computer training centers of the capital Addis Ababa.

Abstract:

This abstract covers the design of G+10 apartment building with medium ductility class according to ES-EN. The paper starts with a summary about basic design criteria outlined in ES-EN 1990:2015. Earthquake analysis and design for a medium ductile building and why it is preferable than a low ductile building was discussed. At the commencement it includes a summary of fundamental principles of earthquake, damage limit state and serviceability limit state, method of analysis, criteria for selection of the analysis method, evaluation of regularity in plan and elevation and design for ductility class medium (DCM). In the linear elastic analysis, lateral force method of analysis was selected. Calculation of base shear force, center of mass, distribution of the horizontal seismic force and accidental torsional effects have been performed using ES-EN 1998:2015. Beam and column design was done based on capacity design philosophy in accordance to ES-EN 1998:2015. At last the design of foundation was done. Isolated footing was selected due to the rigid ground condition.

Biography:

Masters student at Nazarbayev University, Bachelor degree. from Kaznrtu University named after K .I. Satpaev, participant of Satpayev's readings in 2018: "innovative solutions of traditional problems, engineering and technologies", participant of 16^th  international scientific conference in 2018 “information technologies and managment”

Abstract:

The purpose of this investigation is to study the response, due to a moving load, of an Euler-Bernoulli beam resting on a Pasternak two-parameter elastic foundation. The beam is considered infinite in length, slender and with a constant cross-section, and, the load is assumed to be harmonic. The use of the Pasternak two-parameter foundation model is common in practical applications as it more accurately represents the continuous nature of the foundation. The foundation is modelled using transverse and rotational springs which takes into account foundation cohesion by a shear layer of incompressible vertical elements. To solve the governing equation, the double Fourier Transform is applied, and, to convert the frequency domain solution back to the time domain the Inverse Fast Fourier Transform (IFFT) is used. Numerical examples are used to characterize the effect of the moving load velocity on the dynamic displacement response of the beam for different Winkler and Pasternak foundation constants. The maximum deflections of the beam due to different load velocities are calculated as are the bending moment and shear force.

Biography:

Alemam abdallah alemam has completed his Diploma. from Sudan University of science and technology. He is a practicing civil engineering.    

Abstract:

The European Standards and British Standards are the main standards used for the structural design in the UK and many countries around the world. This paper present a comparative study between the Eurocode EC3 and the British standard BS5950 regarding the design of several structural elements in multi-storey braced frame, with respect to each standard notation, load factors, load combinations and design consideration.

The paper compare both the flexural and shear capacity for steel beams, and the deflection values. In addition to compressive resistance for columns and the tension capacity of structural bracing elements.   

The Eurocode EC3 provided higher design capacity for the designed members compared than British standards and resulted in similar deflection value.