高轴压比下中高剪跨比双钢板-混凝土组合剪力墙抗震性能试验研究

通过对4片高轴压比、中高剪跨比双钢板-混凝土组合剪力墙的拟静力试验，研究该类组合剪力墙在低周往复水平荷载作用下的受力性能和破坏模式，分析其延性、刚度、承载力、耗能等性能指标，以及剪跨比、轴压比、距厚比（栓钉间距与钢板厚度之比）等因素对其抗震性能的影响。试验结果表明：中高剪跨比试件的破坏模式为压弯破坏；墙体钢板随距厚比的增加更易发生局部屈曲；试件轴压比越大，压屈越明显、屈曲范围越接近试件底部、屈曲发展越迅速；试件刚度和极限荷载受轴压比、距厚比的影响较小，但变形能力随轴压比的增大而降低；试件剪跨比越大、轴压比越小，滞回性能越稳定；试件耗能随变形增大而迅速增长，抗震性能良好。

Experimental study on seismic behavior of medium and high shear-span ratio composite shear wall with double steel plates and infill concrete under high axial compression ratio

Quasi-static tests on four medium and high shear-span ratio composite shear walls with double steel plates and infill concrete under high axial compression ratio were conducted. The seismic performance and failure modes were observed under low cyclic lateral loads. Ductility, stiffness, bearing capacity, energy dissipation and other indicators were analyzed, and the effects of shear span ratio, axial compression ratio and distance to thickness ratio on seismic performance were studied. The results indicate that the failure modes of medium and high shear-span ratio specimens are the axial-flexural failure. Local buckling is more prone to occur with distance to thickness ratio of steel plate increased. Axial buckling is more significant. The range of buckling is closer to the bottom of the specimen. And the buckling development is more rapid with the increase of axial compression ratio. Stiffness and ultimate load are less affected by axial compression ratio and distance to thickness ratio, but the deformation capacity decreases obviously with the axial compression ratio increased. The hysteretic behavior is more stable with the shear span ratio higher and the axial load ratio lower. Energy dissipation increases rapidly with the increase of deformation，showing good seismic performance.