循环往复荷载作用下透榫节点模型试验研究  

Experimental study of mortise joint model under cyclic loading

作　　者：李溢 任青[1] 程镇 崔宇 LI Yi;REN Qing;CHENG Zhen;CUI Yu(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学环境与建筑学院,上海200093

出　　处：《水资源与水工程学报》2018年第3期200-206,共7页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金青年基金项目(51008194)

摘　　要：目前古建筑木结构的研究主要是以拟静力试验为主,而研究榫卯节点的动力试验相对较少。为了研究不同试验工况作用下透榫节点的动力特性,根据清工部《工程做法则例》制作了缩尺比例为1∶5.3的透榫节点模型,通过长期反复循环加载试验,研究透榫节点模型的枋顶位移在激振过程中的变化规律,拔榫量变化规律,枋顶位移变化与拔榫量变化关系等。试验结果表明:节点的位移变化随着加载幅值的增加而变大且随着加载频率的增大而减小;节点位移也随着循环次数的增大逐渐变大最后趋于稳定,说明开始节点残余变形较大,且累积位移发展速度较快;透榫节点枋顶位移与拔榫量呈线性相关性;同时当加载频率固定时可以将节点位移统一,最后利用指数衰减函数拟合得出相应的位移参数。研究结果可以为现存传统木结构建筑透榫节点的稳定性提供参考。At present,the main research on the wood structure of ancient building is quasi static test,and the dynamic test of mortise joint is few. In order to study the dynamic characteristics of mortise joint under different test conditions,according to the municipal engineering practice rules a mortise joint model with a scale of 1∶ 5. 3 was produced,and through long-term cyclic loading test,the variation of mortise joint model Fang top displacement in the excitation process,variation of Stubbs mortise,top displacement and pull Fang tenon quantity relationship were studied. Experimental results show that the displacement of nodes increases with the increase of the loading amplitude and decreases with the increase of loading frequency. Node displacement is also increasing as the number of cycles increases gradually and finally tends to be stable,indicating the start node residual deformation is large,and the cumulative displacement is of fast development. The displacement of the top node Fang has a linear correlation with the tenon pulling-out amount. At the same time,when the loading frequency is fixed,the displacement of the node can be unified,finally,the corresponding displacement parameters are obtained by fitting the exponential function. The results of the study can provide a reference for the stability of the existing traditional wood structure tenon joints.

关 键 词：木结构 透榫节点 循环加载 节点位移 

分 类 号：TU366.5[建筑科学—结构工程]