不同轴压比RCS梁柱组合件恢复力模型研究  

Research on restoring force model of RCS beam-column assembly with different axial compression ratios

作　　者：朱旦 李升才[1] 朱永甫 ZHU Dan;LI Shengcai;ZHU Yongfu(College of Civil Engineering,Huaqiao University,Xiamen 361021,China;Minnan University of Science and Technology,Fujian Engineering Research Center for Construction and Management of Green Buildings,Quanzhou 362700,China)

机构地区：[1]华侨大学土木工程学院,福建厦门361021 [2]闽南理工学院绿色建筑施工与管理福建省高校工程研究中心,福建泉州362700

出　　处：《世界地震工程》2021年第2期143-152,共10页World Earthquake Engineering

基　　金：国家自然科学基金资助项目(51578253);福建省科技计划引导性项目(2020Y0087);泉州市科技计划项目(2018C083R);华侨大学研究生科研创新基金资助项目(18013086041)。

摘　　要：以6个1/2模型RCS梁柱节点拟静力试验为基础,研究不同轴压比下RCS组合件的滞回性能。试验结果表明:梁铰破坏时试件的滞回曲线饱满,耗能能力优于构造破坏;随着轴压比的增大,试件滞回环愈加丰满,初始刚度有所增加,承载力有所增大;随着加载位移的增加,刚度退化速率变慢,且梁铰破坏时随着轴压比增大,刚度退化速率变大。基于试验结果和现有恢复力模型理论,建立的三折线骨架曲线模型与实际试验骨架曲线具有较高的吻合度,能较好的反映轴压比对其滞回特性的影响,可为该RCS梁柱组合件的弹塑性分析及工程应用提供参考。Based on the pseudo-static test of six 1/2 scale RCS beam-column joints,the hysteretic performance of RCS assemblies under different axial compression ratios is studied.The test results show that when the beam hinge fails,the hysteresis curve of the specimen is plump,and the energy dissipation capacity is better than that of structural failure.With the increase of the axial compression ratio,the specimen present more plump hysteretic loops,a larger initial stiffness and a higher bearing capacity.As the loading displacement increases,the stiffness degradation rate becomes smaller.When the beam hinge fails,the stiffness degradation rate becomes larger as the axial compression ratio increases.Based on the test results and the existing restoring force model theory,the skeleton curve from the established three-fold line model matches reasonably well with that from the test.The proposed skeleton curve model can well reflect the influence of the axial compression ratio on its hysteresis characteristics,and provide references for the elastic-plastic analysis and engineering application of beam-column assemblies.

关 键 词：钢筋混凝土柱-钢梁 组合节点 滞回规则 骨架曲线 恢复力模型 

分 类 号：TU398[建筑科学—结构工程]