新型雀替式黏弹性阻尼器增强传统木结构节点试验研究  

Experimental Study on Enhancing Traditional Timber Structure Joints with a Novel Sparrow Brace Type Viscoelastic Damper

作　　者：彭国威 陶忠[1,2] 燕钊 戴必辉 徐荣荣 PENG Guowei;TAO Zhong;YAN Zhao;DAI Bihui;XU Rongrong(Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650500,China;Yunnan Seismic Engineering Technology Research Center,Kunming 650500,China;Faculty of Cicil Engineering,Southwest Forestry University,Kunming 650224,China)

机构地区：[1]昆明理工大学建筑工程学院,昆明650500 [2]云南省抗震工程技术研究中心,昆明650500 [3]西南林业大学土木工程学院,昆明650224

出　　处：《材料导报》2024年第S02期589-594,共6页Materials Reports

基　　金：国家自然科学基金(52268051);云南省农业联合专项(202301BD07001-128)。

摘　　要：为提高中国传统木结构房屋的抗震性能,本工作采用新型雀替式黏弹性阻尼器对榫卯节点进行加固,制作了两个足尺台阶透榫节点模型,采用新型雀替式黏弹性阻尼器对其中一个节点进行加固。通过低周反复荷载试验,分析台阶透榫节点加固前后的滞回曲线、骨架曲线、刚度退化和耗能能力等抗震性能指标。结果表明:使用新型雀替式黏弹性阻尼器加固台阶透榫节点是可行的,加固后节点滞回曲线的滑移和捏缩现象大幅减轻,滞回环面积增大,耗能能力提升204.5%;加固后试件的骨架曲线斜率和极限承载力均得到大幅提升,正向承载力最大提升173.8%,负向承载力最大提升162.2%;新型雀替式黏弹性阻尼器可以极大提高台阶透榫节点的刚度储备,加固后节点的初始刚度提升216.1%;新型雀替式黏弹性阻尼器加固台阶透榫节点有利于防止节点拔榫破坏,加固后节点的残余拔榫量正负向分别减少33.35 mm和22.2 mm。这些结果可为传统木结构的加固工程提供参考。To enhance the seismic performance of traditional Chinese wooden structures,this study reinforces mortise and tenon joints using a novel sparrow brace type viscoelastic damper.Two full-scale step through tenon joint models were constructed,with one of the joints reinforced using the novel damper.Through low-cycle reciprocating load tests,the seismic performance indicators of the step through tenon joints-such as hysteresis curves,skeleton curves,stiffness degradation,and energy dissipation capacity-were analyzed before and after reinforcement.The test results indicate that reinforcing step through tenon joints with the novel sparrow brace type viscoelastic damper is feasible.After reinforcement,the joint’s hysteresis curve shows significantly reduced slippage and pinching effects,an increased hysteresis loop area,and a 204.5%improvement in energy dissipation capacity.The slope of the skeleton curve and the ultimate bearing capacity of the specimen were greatly improved after reinforcement,with the maximum positive bearing capacity increasing by 173.8%and the maximum negative bearing capacity by 162.2%.The novel sparrow brace type viscoelastic damper significantly enhances the stiffness reserve of step through tenon joints,with an initial stiffness increase of 216.1%after reinforcement.Furthermore,the novel sparrow brace type viscoelastic damper helps prevent mortise and tenon failure,with the residual withdrawal amount of the joint reduced by 33.35 mm and 22.2 mm in the positive and negative directions,respectively,after reinforcement.These results provide valuable insights for reinforcing traditional wooden structures.

关 键 词：木结构节点加固 新型雀替式黏弹性阻尼器 台阶榫节点 抗震性能 

分 类 号：TU366.2[建筑科学—结构工程]