CFRP布加固榫卯节点M-θ滞回曲线定性分析  

Qualitative Analysis of M-θ Hysteretic Curves of Tenon-Mortise Joints Strengthened by CFRP

作　　者：周乾 闫维明[3] ZHOU Qian;YAN Weiming(School of Culture of History and Tourism, Datong University, Datong, Shanxi 037009, China;Palace Museum,Beijing 100009, China;Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100124, China)

机构地区：[1]大同大学历史与旅游文化学院,山西大同037009 [2]故宫博物院,北京100009 [3]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

出　　处：《水利与建筑工程学报》2018年第1期198-206,共9页Journal of Water Resources and Architectural Engineering

基　　金：北京市博士后工作经费项目(2013ZZ-04);故宫博物院科研基金项目(KT2012-7)

摘　　要：为更好地保护古建筑,采取拟静力加载方法,定性研究了CFRP布(Carbon Fibre Reinforced Plastic)加固榫卯节点的抗震效果。以故宫太和殿某开间梁柱框架为原型,制作了1∶8缩尺模型。采取水平低周反复加载方式,首先进行未加固节点抗震性能试验,在此基础上采用CFRP布包裹各榫卯节点,进行加固后节点对比试验。基于试验获得的节点M-θ滞回曲线,对每一个滞回环曲线的承载力、刚度、延性、耗能等力学参数变化进行了详细对比论述,定性评价了CFRP布加固榫卯节点的抗震效果,并进行了量化分析验证。结果表明:榫卯节点加固前具有较好的延性与耗能性能,其主要抗震缺陷包括较低的承载力、较差的转动刚度;与未加固节点相比,CFRP布加固后的榫卯节点可弥补上述不足,且加固后的节点仍具有较好的延性和耗能性能。In order to effectively protect Chinese ancient buildings,the aseismic behaviors of their tenon-mortise joints strengthened by CFRP(Carbon Fibre Reinforced Plastic)were studied.Part of the timber structure of Tai-he Palace in the Forbidden City was taken as examples,its1*8scale model of timber frame with4beams,4columns and concrete roof were built.Low cyclic reversed loading tests were carried out.The initial timber structure were tested firstly.Then its tenon-mortise joints were wrapped by CFRP,the strengthened structure was tested to get the aseismic effects.The M-6(moment-rotation)hysteretic curves of the tenon-mortise joints were obtained.For each hysteretic loop,qualitative analysis on parameters such as bearing capability,rigidity,ductility,energy dissipation and so on of the tenon-mortise joints were carried out to evaluate strengthening effects of CFRP.The quantitative analysis further verified the effects.Results show that compared to each unstrengthened tenon-mortise joint,the CFRP strengthened joint has better bearing performance as well as rotation rigidity,which still has good ductility and energy dissipation capabilities.

关 键 词：CFRP 榫卯节点 抗震加固 滞回曲线 定性分析 

分 类 号：TU366.2[建筑科学—结构工程]