Experimental Research On Shear And Seismic Behavior Of Steel Fiber Reinforced Concrete Shear Wall

Shear wall is one of the main elements resisting lateral loads of the high-rise buildings, but mechanical properties of shear wall are requested high and high with heightening of high building structure. Questions on the seismic behavior of shear wall structure have been become more and more outstanding. Steel fiber concrete behaves excellent strength properties and mechanical characteristics, compensates the deficiencies of plain concrete, improves mechanical and in-service performance of plain concrete. Based on the basic theory of steel fiber concrete, with the cyclic loading, the experimental research is carried out on the shear and seismic behavior of squat steel fiber reinforced concrete shear wall, in particular, 5 models of same concrete strength but different volume fraction of steel fiber and 2 models of same volume fraction of steel fiber but different concrete strength. The paper emphatically analyzes capacity, stiffness, ductility, hysteretic capacity, energy dissipation, failure phenomena and cracking resistance of shear wall affected by the volume fraction of steel fiber and concrete strength. Maximum crack width and crack developing condition of shear wall models are compared. Furthermore, based on theoretical analysis of experiment and the current code, the formula of shear bearing capacity of steel fiber reinforced concrete shear wall is established.The following is main research results:(1) Based on the theoretical analysis and the cyclic loading experimental of 6 steel fiber reinforced concrete shear wall and 1 reinforced concrete shear wall, the paper analyzes shear bearing capacity of shear wall affected by the volume fraction of steel fiber and concrete strength, establishes the calculation model and formula of shear bearing capacity of steel fiber reinforced concrete shear wall.(2) The influence rule of stiffness, ductility, energy dissipation of steel fiber reinforced concrete shear wall, which are affected by the volume fraction of steel fiber and concrete strength, is researched.(3) The influence rule of cracking resistance of steel fiber reinforced concrete shear wall, which are affected by the volume fraction of steel fiber and concrete strength, is researched.(4) The influence rule of maximum crack width and crack developing condition of shear wall, which are affected by the volume fraction of steel fiber, is researched, by analyzing maximum crack width and crack developing condition during the experiment...