摘要
提出了壁式钢管混凝土(WCFT)柱与钢梁连接的侧板式节点。为研究其抗震性能,设计了3个侧板式节点足尺试件进行拟静力试验,分析试件的破坏形态、滞回曲线、骨架曲线、延性、耗能能力、刚度退化和节点域应变。试验结果表明:3个节点试件的节点域均处于弹性阶段,满足侧板水平及竖向强度比的侧板式节点试件破坏形态为梁端塑性铰破坏,发生梁端塑性铰破坏的节点试件具有较好的变形和耗能能力;侧板水平或竖向强度比不足100%的侧板式节点试件呈现脆性破坏特征。在试验研究的基础上,结合梁端内力传导机制提出了侧板式节点在节点域外的三种破坏模式及相应判别公式,与试验结果基本吻合,从而为工程设计提供参考。
Side-plate joints for walled concrete-filled steel tubular column and steel beam are proposed.In order to study the seismic performance of the joint,the quasi-static tests of three full-size side-plate joint specimens were carried out.The failure pattern,hysteretic curve,skeleton curve,ductility,energy dissipation capacity,stiffness degradation and strain of the joint panel were analyzed.The results are as follows.The joint panels of three specimens remain elastic;the plastic hinge failure occurs at the beam end of side-plate joint specimens meeting the horizontal and vertical strength ratio requirements;the joint specimens with plastic hinge occurring at beam ends have good deformation performance and energy dissipation capacity,while the side-plate joints whose horizontal or vertical strength ratios are less than 100%undergo brittle failure.Based on the experimental study and the internal force transmission mechanism at beam ends,three failure modes of side-plate joint outside the joint panel and corresponding discriminant formulas were put forward,which were basically consistent with the experimental results and could be used as reference for engineering design.
作者
黄育琪
郝际平
樊春雷
薛强
王立军
孙晓岭
刘瀚超
HUANG Yu-qi;HAO Ji-ping;FAN Chun-lei;XUE Qiang;WANG Li-jun;SUN Xiao-ling;LIU Han-chao(School of Civil Engineering,Xi'an University of Architecture&Technology,Xi'an,Shaanxi 710055,China;Key Lab of Structural Engineering and Earthquake Resistance,Ministry of Education(XAUAT),Xi'an,Shaanxi 710055,China;Huachengboyuan Engineering Technology Group,Beijing 100052,China)
出处
《工程力学》
EI
CSCD
北大核心
2020年第12期34-42,共9页
Engineering Mechanics
基金
国家重点研发计划项目(2017YFC0703806)
陕西省建设厅科技发展计划项目(2016-K86)。
关键词
壁式钢管混凝土柱
侧板式节点
足尺试验
抗震性能
破坏模式
walled concrete-filled steel tubular column
side-plate joint
full-scale experiment
seismic performance
failure mode
