EXPERIMENTAL INVESTIGATION ON ASEISMIC BEHAVIOR OF DUCTILE FIBER REINFORCED CONCRETE SHEAR WALLS

In order to improve the aseismic behavior of high performance concrete shear walls, 4 specimens of shear walls with ductile fibre reinforced concrete (DFRC) in the plastic region and shear span ratios of 2.1 were designed and the quasi-static tests were carried out. The failure mechanism, energy dissipation capacity and deformability of shear walls were studied under various DFRC zone height, axial compression ratios and confinement stirrup. The research shows that: 1) DFRC in the plastic region of shear walls can extend the rage of an elastic stage and delay the decreasing of bearing capacity after yield; 2) DFRC in the plastic region of the shear walls can control the width of flexural-shear cracks and prevent shear failure; 3) the deformability and energy dissipation capacity can be improved significantly with the increase of DFRC zone height and confinement stirrup in DFRC; 4) DFRC in the plastic region of shear walls can reduce the damage degree in the plastic region obviously and it is important to reduce the earthquake damage of shear walls.