【摘要】 对江浙地区早期传统木构建筑中常用的镊口鼓卯、双榫和单榫在低周反复荷载作用下的受力性能进行了研究。通过试验获取该3种榫卯节点在低周反复荷载作用下的破坏模式、滞回曲线、骨架曲线、转角刚度、延性系数及耗能能力。结果表明:3种榫卯节点的滞回曲线基本上都呈Z形,具有明显的捏拢特性。该3种榫卯试件均经历了弹性阶段、屈服阶段和破坏阶段。对于极限转角、弹性刚度和延性系数而言:镊口鼓卯大于双榫,双榫大于单榫。耗能能力总体随着节点转角的增大而减小,镊口鼓卯的耗能能力大于双榫的耗能能力,双榫的耗能能力大于单榫的耗能能力。研究结果可为江浙地区早期传统木构建筑的计算分析及保护修缮提供理论基础。更多还原

【Abstract】 The mechanical properties of the typical mortise-tenon joints of the ancient traditional timber buildings in Jiangsu and Zhejiang are studied. The tested mortise-tenon joints include one niekou gumao mortise-tenon joint,one double mortise-tenon joint and one single mortise-tenon joint. The failure modes,the hysteretic curves,the skeleton curves,the rotation rigidities,the ductility factors,and the energy dissipation capacity of these three kinds of mortise-tenon joints under low cyclic loading are obtained. The results show that the hysteretic curves of the niekou gumao mortise-tenon joint joint,the double mortise-tenon joint and the single mortise-tenon joint appear to be the Z shape and have the obvious pinch effects. During the process of the test,the mortise-tenon joints orderly pass through the elastic stage,the yield stage and the failure stage. In terms of ultimate rotation,elastic rotation rigidity and ductility factor,the descending order is: niekou gumao mortise-tenon joint,double mortise-tenon joint,single mortise-tenon joint. The energy dissipation capacity of the mortise-tenon joints decreases with the increase of joint rotation. The sort of energy dissipation capacity in descending order is: niekou gumao mortise-tenon joint,double mortise-tenon joint,single mortise-tenon joint. The results can provide the theoretical base for computing analysis and repair design of these traditional timber buildings.更多还原