不同轴压比下HR-EPS模块剪力墙抗震性能研究

THE SEISMIC BEHAVIOR OF HR-EPS SHEAR WALL UNDER DIFFERENT AXIAL COMPRESSION RATIOS

为研究足尺HR-EPS模块剪力墙试件在不同轴压比下的抗震性能,文中通过低周往复荷载试验和有限元模拟结合的方法,开展了足尺HR-EPS模块剪力墙试件在不同轴压比下的抗震性能分析,获得试件的不同抗震性能指标,结果表明增大轴压比可以在一定程度上使试件的极限承载力增强,但会有一个上限值,超过这个上限值会使破坏具有一定脆性;与小轴压比墙体相比,大轴压比墙体的刚度退化速度在加载的前期稍显迅速;模拟结果与试验数据基本一致,适当增大轴压比使滞回曲线更加圆滑。获得不同轴压比下剪力墙的耗能能力和位移延性,为HR-EPS模块剪力墙的抗震性能提供数据依据,在实际工程应用奠定基础。

The seismic behavior of shear wall specimens with full scale HR-EPS module under different coaxial compression ratios was studied by the low cycle reciprocating load test and finite element simulations. The results show that the HR-EPS shear wall has good energy dissipation capacity and displacement ductility. Increasing axial compression ratio can enhance the ultimate bearing capacity of specimens to a certain extent with an upper limit value which would lead to the failure brittle. Compared with walls with small axial compression ratio, the stiffness degradation rate of the wall with large axial compression ratio is slightly faster in the early stage of loading. The simulation results are in good agreement with that of the experimental data. Appropriately increasing the axial compression ratio makes the hysteresis curve more smooth. The energy dissipation capacity and displacement ductility of the shear wall under different axial compression ratio are obtained, which provides base data for the seismic performance of HR-EPS module shear wall and lays a foundation for practical engineering application.