古建筑榫卯节点抗震性能试验  

Aseismic Behavior of Chinese Ancient Tenon-Mortise Joint

作　　者：周乾[1,2] 闫维明[1] 周锡元[1] 张博[1] 

机构地区：[1]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124 [2]故宫博物院,北京100009

出　　处：《振动．测试与诊断》2011年第6期679-684,808,共6页Journal of Vibration,Measurement & Diagnosis

基　　金：文化部科技创新资助项目(编号:17-2009);故宫博物院科研基金资助项目(编号:KT2007-4)

摘　　要：为保护古建筑,采用低周反复加载试验方法,基于故宫太和殿某开间梁柱尺寸,制作了1∶8的缩尺比例的4梁4柱模型,考虑榫卯节点形式为燕尾榫,进行了低周反复加载试验,研究了古建筑榫卯节点的抗震性能。通过试验,获得了榫卯节点的M-θ滞回曲线,分析了节点的骨架曲线、耗能能力、刚度退化及延性性能,归纳了节点恢复力拟合曲线计算公式。结果表明,古建筑榫卯节点的M-θ滞回曲线以Z形为主,具有明显的捏拢特性;随着节点转角增大,其骨架曲线趋于平缓,体现了良好延性;节点承载力较小,耗能能力及刚度随着转角增大而降低。To protect Chinese ancient building,aseismic behaviors of Chinese ancient tenon-mortise joint are studied.Based on actual sizes of some part of Tai-He Palace in the Forbidden City,wooden frame models with a scale of 1:8 of the prototype structure are built considering Yan-wei type of tenon-mortise connections.By low cyclic reversed loading tests,M-θhysteretic curves as well as skeleton curves of the joints are obtained;the energy dissipation capability,stiffiness degradation and deformation performance are analyzed,then restoring force model is also studied.Results show thatM-θhysteretic curves of tenon-mortise joint are mainly of Z shape with obvious rheostriction property.With the increase of joint rotation angle,its skeleton curve tends to be flat which reflects its good ductility performance;however its energy dissipation capability and stiffiness decrease,and the tenon-mortise joint has low bearing capability.

关 键 词：木结构 抗震 试验 中国古建筑 榫卯节点 

分 类 号：TU366.2[建筑科学—结构工程]