木框架-夹板剪力墙组合结构抗侧力性能试验研究

为研究木框架-夹板剪力墙组合结构的抗侧力性能，对5榀木框架-夹板剪力墙试件、2榀纯框架试件和2片夹板剪力墙试件开展了低周反复加载试验，对比分析试件在往复荷载作用下的破坏机理、抗侧刚度、极限承载力、延性、刚度退化规律和耗能能力。研究结果表明，木框架-夹板剪力墙组合结构的抗侧力性能主要取决于内填夹板剪力墙的性能，其最终的破坏模式表现为共用墙骨柱因钉连接的失效而脱落。外侧梁柱框架对内填夹板剪力墙的约束作用能显著减小端部墙骨柱的上拔，可取消抗倾覆连接件的设置。木框架-夹板剪力墙组合结构的抗侧刚度和极限承载力约为木框架-常规轻木剪力墙组合结构的两倍，且在大变形情况下仍能持有70%峰值荷载的承载能力，有利于避免罕遇地震下的倾覆倒塌。

Experiment study on lateral performance of timber frame-midply shear wall hybrid system

In order to investigate the lateral performance of timber frame-midply shear wall hybrid system, cyclic loading tests were conducted on five timber frame-midply shear wall hybrid systems, two post-and-beam frames and two midply shear walls. The Failure mode, lateral stiffness, ultimate bearing capacity, ductility, stiffness degradation and energy dissipation of the specimens were analyzed. The test results show that the lateral performance of timber frame-midply shear wall hybrid system depends on the behavior of the infill midply shear wall, and the failure mode is governed by detachment of the joint studs. Due to the constraints from the outer post-and-beam frame, the uplift of the end stud in the infill midply shear wall can be minimized, which may make hold-down systems unnecessary. The timber frame-midply shear wall hybrid system has twice the lateral stiffness and ultimate bearing capacity as comparable timber frame structures infilled with normal wood-frame shear walls. Moreover, in the case of large deformation, this hybrid system can still carry a load of 70% of its load-carrying capacity, a case which helps prevent collapse in severe earthquakes.