夹板木剪力墙的抗侧力性能试验  

Lateral force resistance performance of sheathing sandwiched wood shear walls

作　　者：郑维[1] 陆伟东[1] 刘伟庆[1] 刘杏杏[1] 

机构地区：[1]南京工业大学土木工程学院,南京211816

出　　处：《振动与冲击》2016年第19期94-100,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金面上项目(51378225)

摘　　要：为研究不同构造形式对夹板木剪力墙抗侧力性能的影响,对8片夹板木剪力墙试件进行了水平抗侧力试验,其中1片为单调加载,7片为低周反复加载,试件参数包括墙肢长度、墙骨柱间距、墙面板厚度以及钉间距。根据试验现象和由试验数据对比分析了各试件的破坏模式及抗剪强度、抗侧刚度、变形能力、刚度退化和耗能等性能指标,结果表明,端部墙骨柱在抗拔锚栓顶部的受拉断裂是导致夹板木剪力墙整体破坏的最主要原因;墙面板的厚度决定了边缘墙骨上钉连接的破坏模式,是影响夹板木剪力墙抗侧刚度和极限位移的重要因素;合理减小钉间距能明显提升墙体的强度、刚度及耗能,但不宜小于75/150 mm,否则易造成顶梁板和底梁板的劈裂破坏;墙骨柱间距及墙肢长度的变化则对其抗侧力性能的影响较小。夹板木剪力墙具有优异的抗侧力性能,可应用在更高抗侧力需求的中高层木结构建筑中。In order to evaluate the influences of different structural forms on the lateral force resistance performance of sheathing sandwiched wood shear walls, one monotonic loading test and seven reversed cyclic tests were performed for 8 specimens of such walls. Four typical specimen parameters were considered including wall length, stud spacing, sheathing plate thickness and nails spacing. The specimens’ failure modes and their shear strength, lateral stiffness, ultimate displacement, stiffness degradation and energy dissipation were analyzed and compared. The results showed that the tensile fracture of end stud appearing at the top of hold-down is the main cause for the overall damage of sheathing sandwiched wood shear walls; the sheathing plate thickness determines the failure modes of nail connections on the edge frame, and it has significant effects on the lateral stiffness and ultimate displacement of the walls; appropriate decrease in nails spacing can increase the shear strength and lateral stiffness of the walls, but the nails spacing should be larger than 75/150 mm to avoid splitting of top plates and bottom plates; sheathing sandwiched shear walls have an excellent lateral force resistance performance and can be applied in high-rise or mid-rise timber buildings.

关 键 词：夹板木剪力墙 低周反复加载 骨架曲线 抗剪强度 双剪切面钉连接 

分 类 号：TU366.2[建筑科学—结构工程]