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

With the development of high-rise building and widely use of concrete structure, shear wall structure was taken more and more attention because of the great lateral rigidity, high capability of energy dissipation and load bearing. But with the enhanced concrete strength and the increasing height of building, the problems of brittleness and debasing earthquake resistant behavior which were caused by reduction of cross section were more and more prominent. Steel fiber concrete has got social recognition by its better property of ductility and the property of energy absorption and dissipation, and has been widely used in transportation, bridge, and civil engineering. But the research on the steel fiber concrete shear wall is less for the moment.In this dissertation, the experimental study was carried out on the bending property and seismic behavior of 5 steel fiber reinforced concrete shear walls and 1 normal concrete shear wall under cyclic reverse load. The main achievements of the dissertation are as follows:(1) By the experiment of cyclic reverse load of 5 steel fiber reinforced concrete shear walls and 1 normal concrete shear wall under cyclic reverse load, the effect of steel fiber volume fraction and steel fiber concrete strength on the load-carrying capacity of shear walls was emphatically analyzed; the bending mechanism and calculation model of shear wall was discussed. Finally, the calculation model and formulas of steel fiber concrete shear wall were suggested.(2) The influence of steel fiber volume fraction and steel fiber concrete strength on the hysteretic behavior,ductility,ability of dissipation energy and stiffness of shear walls were studied.(3) The cross-section crack-resistant property of shear walls affected by the volume fraction of steel fiber and steel fiber concrete strength were emphatically analyzed, the calculation model and calculation formulas of cross-section crack-resistant capacity of steel fiber reinforced concrete shear walls were put forward connected with the computational theory of cross-section crack-resistant of normal concrete. And the simplified formulas were also put forward.(4) The crack widths of some cracks were recorded in all process of experiment .The developing process of the crack width and the crack width affected by steel fiber was analyzed; and the general rule that the crack width affected by steel fiber was put forward.