木结构榫卯节点抗震性能及加固试验分析  

Seismic performance and reinforcement test analysis of wood structure mortise and tenon joints

作　　者：滕佳男 苏何先[1,2] 潘文 朱传伟[1,2] TENG Jianan;SU Hexian;PAN Wen;ZHU Chuanwei(School of Civil Engineering,Kunming University of Science and Technology,Kunming 650500,China;Yunnan Seismic Engineering Technology Research Center,Kunming 650500,China)

机构地区：[1]昆明理工大学建筑工程学院,云南昆明650500 [2]云南省抗震工程技术研究中心,云南昆明650500

出　　处：《西安建筑科技大学学报（自然科学版）》2024年第5期773-781,共9页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家重点研发计划(2020YFD1100703-04);云南省教育厅科学研究基金(2021J0062)。

摘　　要：不同类型榫卯节点的加固方式应根据其具体破坏模式来选择,为探究不同加固方式与榫卯节点类型的适宜性,采用多阶屈曲阻尼器、伸臂式金属阻尼器、钢条分别对透榫节点、燕尾榫节点、半榫节点进行加固,通过开展加固与未加固榫卯节点低周反复荷载试验,并对比分析了榫卯节点的破坏特征、水平承载力、刚度和耗能能力.试验结果表明:各加固方式均能有效抑制节点拔榫、增加节点耗能、提升节点最大承载力和刚度等抗震性能指标,但各加固方式效率及对节点性能影响差异明显.其中,多阶屈曲阻尼器、伸臂式金属阻尼器和钢条加固节点的最大承载能力较未加固节点分别提高了46.7%、496%、203%;加固节点的初始刚度分别提高了14.5%、426%、221%;多阶屈曲阻尼器可显著增强透榫节点的耗能能力且对其承载力和初始刚度影响有限;伸臂式金属阻尼器可大幅提升燕尾榫节点的初始刚度和最大承载力,有效避免出现榫颈和榫角断裂;钢条加固方式在有效抑制半榫节点的拔榫的同时能有效提升节点刚度和承载力.可见,不同类型榫卯节点应根据性能需求选用适宜的加固方式并对加固参数进行合理化设计.In order to explore the suitability of different reinforcement methods and types of mortise and tenon joints,multi-stage buckling dampers,extended-arm metal dampers and steel bars are used to reinforce transparent tenon joints,dovetail tenon joints and half-tenon joints respectively..Through the low cyclic loading test of reinforced and unreinforced mortise-tenon joint,the failure characteristics,horizontal bearing capacity,stiffness and energy dissipation capacity of mortise-tenon joint are compared and analyzed.The test results show that each reinforcement method can effectively restrain the joint pulling tenon,increase the energy consumption of the joint,improve the maximum bearing capacity and stiffness of the joint and other seismic performance indexes,but the efficiency and influence of each reinforcement method on the performance of the joint are different.Among them,the maximum bearing capacity of the multi-stage buckling damper,the metal damper with the extension arm and the steel bar reinforced node is increased by 46.7%,444%and 244%,respectively,compared with the unreinforced node.The initial stiffness of the reinforced joints is increased by 14.5%,426%and 221%,respectively.The multi-stage buckling damper can significantly enhance the energy dissipation capacity of the joint and has limited influence on its bearing capacity and initial stiffness.The metal damper can greatly increase the initial stiffness and maximum bearing capacity of the dovetail joint,and effectively avoid the fracture of the joint neck and corner.The steel bar reinforcement method can effectively restrain the pulling of the half-tenon joint and improve the stiffness and bearing capacity of the joint.It can be seen that different types of mortise and tenon joints should be selected according to the performance requirements of the appropriate reinforcement methods and rational design of reinforcement parameters.

关 键 词：加固方式 卯榫节点 低周反复荷载试验 性能需求 

分 类 号：TU366[建筑科学—结构工程]