为了研究新型格构柱式组合剪力墙的抗震性能,设计了4个格构柱式组合剪力墙试件,并对其进行拟静力试验,研究其在低周往复水平荷载作用下的破坏模式和滞回性能,分析轴压比对一字形和T形截面剪力墙抗震性能的影响。结果表明:剪跨比分别为2.4、2.7的一字形试件和T形截面试件的破坏模式均为压弯破坏,破坏时剪力墙底部钢板严重屈曲,混凝土压溃;随着轴压比的增大,一字形和T形截面试件钢板屈曲发展速度加快,屈曲范围增大,刚度与承载力退化加剧,耗能能力和延性降低;T形截面试件腹板侧墙体与翼缘侧墙体破坏呈不对称性,试件均在腹板侧墙体受压时发生破坏。建议设置矩形钢管或翼缘墙体作为格构柱式组合剪力墙的边缘约束构件并适当加密缀板布置。
In order to study the seismic performance of the lattice-column composite shear wall,four specimens were designed and quasi-static test was carried out to study the failure mode and hysteresis performance of lattice-column composite shear wall. The effects of axial compression ratio on the mechanical behavior of I-shaped and T-shaped shear walls were analyzed. The results indicate that the failure modes of the I-shaped specimens and the T-shaped specimens with the shear span ratio of 2.4 and 2.7 are compression and bending failure, the steel plate at the bottom of the shear wall is seriously buckling and the concrete is crushed when the damage occurs. As the axial compression ratio increases, the buckling development speed of the I-shaped and T-shaped specimens increases, the buckling range increases, the stiffness and strength degradation worsens, and the energy consumption and ductility decrease. The damage of the web side and the flange side of T-shaped specimens are asymmetrical, and the specimens are damaged when the web side is pressed. It is recommended to set a rectangular steel pipe or flange wall as the edge constraint member of the lattice-column composite shear wall and properly increase the number of the plate arrangement.