INVESTIGATION ON THE SEISMIC BEHAVIOR OF STEEL-PLATE AND HIGH DUCTILE CONCRETE COMPOSITE LOW-RISE SHEAR WALLS

To improve the seismic behavior of low-rise shear walls, the double steel plates and high ductile concrete (HDC) composite low-rise shear wall (DHW) was proposed. One HDC low-rise shear wall (HW), two single steel plate reinforced HDC low-rise shear walls (SHW) and two DHWs were designed. The influence of the axial load ratios and steel distribution form on the failure modes, hysteretic performance, shear capacity, deformation capacity, energy dissipation capacity and stiffness degradation of the specimens were studied by quasi-static tests. The experimental results indicate that the failure modes of the HW, SHW and DHW are the shear failure, the flexural-shear failure and the flexural failure, respectively. The deformability and strength capacity of the steel-plate and HDC composite low-rise shear walls are significantly improved compared with those of the HWs. The axial load ratio has little effect on the peak load and stiffness of the steel-plate and HDC composite low-rise shear walls. When the axial load ratio increases from 0.5 to 0.7, the deformation capability of the SHW decreases, whereas the deformation capability of the DHW does not decrease. Formulas for predicting the bending capacity of the steel-plate and HDC composite low-rise shear walls are suggested, and the calculation results agree well with the test results.