论文部分内容阅读
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。
Based on the quasi-static tests of 4 high-axial-compression ratio and medium-high shear-to-short ratio double steel-concrete composite shear walls, the mechanical properties and failure modes of such composite shear walls under horizontal reciprocating loads are studied. The performance indexes such as ductility, stiffness, bearing capacity and energy dissipation, as well as the influence of shear span ratio, axial compression ratio, distance-to-thickness ratio (the ratio of stud spacing to the thickness of steel plate) and other factors on the seismic performance are analyzed. The test results show that the failure mode of middle-high shear-span ratio specimen is bending failure; the local buckling of wall steel is more likely to occur as the thickness-to-thickness ratio increases; the greater the axial compression ratio, the more obvious the buckling, The buckling developed more rapidly at the bottom and buckling stiffness. The stiffness and ultimate load of the specimen were less affected by the axial compression ratio and thickness ratio, but the deformation capacity decreased with the increase of the axial compression ratio. The smaller the hysteresis, the more stable the hysteresis performance. The energy dissipation of specimens increases rapidly with the increase of deformation, and the seismic performance is good.