往复荷载下正交胶合木剪力墙的#br# 承载能力与变形模式研究

正交胶合木(Cross Laminated Timber，简称CLT)剪力墙结构具有资源可再生、装配化程度高、承载能力强等优点。文章通过拟静力试验对往复荷载下CLT剪力墙的承载能力与变形模式开展研究。设计平台法和连续法建造的带半搭接节点的CLT剪力墙试件，通过对两种建造方法的CLT剪力墙试件进行拟静力往复加载试验，对比往复荷载作用下，两种建造方法的CLT剪力墙试件的破坏模式、初始刚度、耗能能力和刚度退化特性，并分析两种建造方法的CLT剪力墙变形模式变化趋势。研究结果表明：在相同的侧向位移下，连续法CLT剪力墙的节点变形较平台法CLT剪力墙严重，且连续法CLT剪力墙的初始刚度和耗能能力较平台法CLT剪力墙高，两种建造方法的CLT剪力墙均表现出了明显的刚度退化现象。

Cyclic load capacity and deformation mode of cross-laminated timber shear walls

 Cross-laminated timber (CLT) structures possess the advantages of renewable materials,easy assembly,and high load capacity. In order to investigate the lateral performance of CLT shear walls,the CLT shear wall specimens of platform-type and balloon-type with half-lapped wall-to-wall joints were designed and tested under quasi-static cyclic loading. The failure modes,initial stiffness,energy dissipation capacity,stiffness degradation characteristics of the specimens were obtained and compared. Results show that angle brackets,hold-downs and half-lapped wall-to-wall joints in the balloon-type CLT shear walls suffer more damages than those in the platform-type CLT shear walls. The initial stiffness and energy dissipation capacity of the balloon-type CLT shear walls are larger than those of the platform-type CLT shear walls. Meanwhile,the CLT shear walls constructed by the platform or balloon method exhibit obvious stiffness degradation characteristics during the cyclic loading process.