【摘要】 为探讨古建筑榫卯节点的有效抗震加固方法,提出了一种钢构件加固方法.基于故宫太和殿某开间结构原型,制作了1∶8缩尺比例的木结构空间框架模型,考虑梁柱连接为燕尾榫形式,进行了低周反复加载试验,其中未加固构架试验进行了3组,加固试验进行了2组.基于试验相关数据,获得了节点的弯矩-转角滞回曲线和骨架曲线,对比分析了节点加固前后的耗能能力,刚度退化和延性等抗震指标.结果表明:钢构件加固榫卯节点后,节点拔榫量减小,抗弯承载力提高,刚度退化不明显,加固后的节点仍有较好的耗能能力和延性.因此钢构件具有良好的加固效果.更多还原

【Abstract】 To find an effective strengthening method for Chinese ancient tenon-mortise joint,a form of steel components was brought up.According to a Chinese ancient wooden building,5 groups(3 unstrengthened and 2 strengthened by steel components on tenon-mortise joints)of 1∶ 8 scale wooden frame models were built considering swallow tail joint type.By manual loading means,low cyclic reversed loading tests were carried out.For each joint,its moment-rotation hysteretic curves and skeleton curves were obtained,its energy dissipation capability,stiffiness degradation as well as deformation performance were analysed.Results showed that after the joint was strengthened by steel components,its tenon pull value became less,its stiffness and strength were enhanced,its stiffness degradation was not obvious,and it still had good energy dissipation capability as well as ductility.Thus the strengthening method is effective.更多还原