Dr. Abdulqader S. Najmi
The University of Jordan, Jordan
Title: Design of shear reinforcement of Beams – New approach
Biography
Biography: Dr. Abdulqader S. Najmi
Abstract
Shear failure occurs suddenly in beams without properly designed shear reinforcement. A set-up of swimmer bars system takes the shape of plane crack interceptors are employed to counteract the potential diagonal tension failure. Each counteract plane crack interceptor is formed by swimmer bars will generate a plane intercepting approximately and perpendicularly the inclined plane of the diagonal tension failure. A reference to testing programs of beams subjected to shear will be used; The results obtained from testing has proved that the efficiency of using swimmer bars system in beams has increased their shear capacity to more than 250% and has decreased their deflection by increasing the stiffness of the beams in the vicinity of the concentrated loads, moreover, the nature of the shear failure becomes ductile instead of brittle and obviates sudden failure. The ultimate strength of shear is limited by the compression shear failure. The gain in ductility can reach levels matching those in flexural behavior.