Seismic behavior of steel fiber reinforced high strength concrete shear walls with different embedded steel configurations

Abstract

Four steel fiber reinforced high strength concrete shear walls with different embedded steel configurations were conducted under quasi-static tests, to investigate the influences of the diagonal steel bar bracings in the wall web, the embedded steel tubes in the boundary zone, and the concealed steel truss on the seismic behavior of the proposed shear walls. Furthermore, the finite element modelling and the parametric analysis were conducted and verified against the test results. Research shows that both the reinforcement bracings and the channel steel bracings restrained the development of cracks and decreased the crack widths, especially the channel steel bracings, which showed a more remarkable effect on alleviating the damage of the wall. The two types of the concealed bracings could slow down the stiffness degradation rate, and enhance the plastic deformation capacity of the shear walls. The finite element analysis indicated that a reasonable axial load ratio was conductive to exert the cyclic behavior of the concealed bracings. For the steel truss reinforced concrete walls, the increase of the cross sectional ratio of steel tubes within a reasonable range could improve the co-working performance for the wall panel and the boundary columns.