框架柱托换节点抗震性能研究  

Seismic performance of frame column underpinning joints

作　　者：李书蓉 张鑫[1,2] 岳庆霞 巩善亮 LI Shurong;ZHANG Xin;YUE Qingxia;GONG Shanliang(Key Laboratory of Building Structural Retrofitting and Underground Space Engineering,Ministry of Education,Shandong Jianzhu University,Jinan 250101,China;School of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China;Tongyuan Design Group Co.,Ltd.,Jinan 250101,China)

机构地区：[1]山东建筑大学建筑结构加固改造与地下空间工程教育部重点实验室,山东济南250101 [2]山东建筑大学土木工程学院,山东济南250101 [3]同圆设计集团有限公司,山东济南250101

出　　处：《振动与冲击》2024年第5期159-165,181,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(52038006,52208486);山东省自然科学基金(ZR2021QE268)。

摘　　要：为了研究框架柱托换节点的抗震性能,设计了5个包裹式托换节点,进行往复加载试验,分析结合面高度和界面钢筋对托换节点破坏形态和抗震性能的影响。建立了托换节点的非线性数值计算模型,验证了数值计算模型的正确性。试验和分析结果表明:结合面高度对托换节点的抗震性能影响显著,结合面高度为200 mm时,界面钢筋影响托换节点的破坏模式,托换节点的初始刚度随着界面钢筋数量的增加而增大;结合面高度为300 mm时,界面钢筋对托换节点的抗震性能影响较小。Here,to study the seismic performance of frame column underpinning joints,5 wrapped underpinning joints were designed and constructed.The cyclic loading tests were conducted for them to analyze effects of joint interface height and interface reinforcement on failure mode and seismic performance of underpinning joints.A nonlinear numerical calculation model for underpinning joint was established,and the accuracy of the numerical calculation model was verified by comparing the numerical simulation results with the test results.Test and analysis results showed that joint interface height has a significant impact on seismic performance of underpinning joint.When the joint interface height is 200 mm,interface reinforcement affects the failure mode of underpinning joint,and the initial stiffness of the underpinning joint increases with the increase in the number of interface reinforcement.When the joint interface height is 300 mm,the interface reinforcement has little influence on the seismic performance of the frame underpinning joints.

关 键 词：框架结构 托换节点 拟静力试验 抗震性能 界面钢筋 

分 类 号：TU375.4[建筑科学—结构工程] TU317.1