残损古建筑木结构不对称榫卯节点恢复力特性  

Restoring force behavior of asymmetric damaged mortise-tenon joints of ancient wooden buildings

作　　者：兰英静[1] 董金爽 LAN Yingjing;DONG Jinshuang(Haidu College,Qingdao Agricultural University,Laiyang,Shandong 265200,China;College of Civil Engineering and Architecture,Hainan University,Haikou 570228,China)

机构地区：[1]青岛农业大学海都学院,山东莱阳265200 [2]海南大学土木建筑工程学院,海口570228

出　　处：《中国科技论文》2023年第10期1056-1062,共7页China Sciencepaper

基　　金：海南省自然科学基金资助项目(520RC544);山东省本科高校教学改革研究项目(M2022173)。

摘　　要：为研究残损古建筑木结构榫卯节点的恢复力特性,共设计了4个古木结构不对称榫卯结构,包括1个完好无残损的榫卯节点试件和3个不同残损程度的榫卯节点试件,分析低周反复荷载作用下试件的滞回特性,并通过分析试件刚度退化规律及滞回规则,提出了古木结构不对称榫卯节点的特征参数计算公式,建立了能够反映不同残损程度古建筑木结构榫卯节点真实受力状况的恢复力特征曲线。结果表明:不对称榫卯节点滞回曲线的形状随着残损程度的增加由S形向反Z形转变,捏缩效果逐渐显著;各试件骨架曲线的正向加载和反向加载显著不对称;恢复力特征曲线与试验结果拟合效果较好,表明所建恢复力模型具有一定的适应性,可用于残损古木结构节点的弹塑性分析。In order to study the restoring force behavior of damaged mortise and tenon joints in ancient wooden buildings,four mortise-tenon joints were designed in the present work,including three through-tenon joints with different levels damage and one through-tenon joints without damage.The moment-rotation hysteretic characteristics of the mortise and tenon joints was analyzed under low cyclic reversed loading test.Through the analysis of the stiffness degradation law and hysteresis rules,the formula of the characteristic coefficient for the ancient wooden buildings asymmetric mortise-tenon joints was proposed.And then the characteristic curve of restoring force of asymmetric mortise-tenon joints in ancient wooden buildings which indicated its real stress state was set up.The experimental results indicate the shape of the hysteretic curve of the joints changes from“S”shape to the reverse“Z”shape with the increase of the damaged level,and that the pinching effect gets gradually significant.The skeleton curves of though-mortise joints exhibit significant asymmetry in forward and reverse loading.Compared with the experiments results,the restoring force characteristic curve fits better.The comparison and analysis results show that the established restoring force characteristic curves fit well,indicating a certain degree of adaptability of the restoring force characteristic curve.

关 键 词：古建筑木结构 松动程度 透榫节点 滞回规则 恢复力模型 

分 类 号：TU366.2[建筑科学—结构工程]