型钢高强高性能混凝土框架节点P-Δ恢复力模型  

Research on Restoring Force Model of SRHSHPC Frame Joints

作　　者：曾磊[1] 许成祥[1] 郑山锁[2] 吕营[2] 陈娟[1] 

机构地区：[1]长江大学城市建设学院,荆州434023 [2]西安建筑科技大学土木工程学院,西安710055

出　　处：《武汉理工大学学报》2012年第9期104-108,共5页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(51108041);湖北省自然科学基金(2011CDB009);湖北省教育厅科学技术研究项目(Q20111316)

摘　　要：为了解地震作用下型钢高强高性能混凝土框架梁柱节点的滞回性能和恢复力特性,进行了5榀1∶4比例不同混凝土强度等级、不同轴压比的框架中节点低周反复加载试验。在试验所获得的滞回曲线和骨架曲线的基础上建立了适合于型钢高强高性能混凝土框架节点的考虑刚度退化的三线型恢复力模型。该恢复力模型包括一条基于计算的三折线骨架曲线模型、刚度退化规律以及基于试验现象的滞回规则。所提出的恢复力模型能较好地反映试件的滞回性能,可供型钢高强高性能混凝土框架节点及其结构在进行弹塑性地震反应分析时参考。To understand hysteresis behaviors and restoring force characteristics of steel reinforced high strength and high performance（SRHSHPC） frame joints under earthquake,cyclic loading tests with different concrete strength grade and different axial load were carried out on five 1∶4-scale interior joints.According to seismic hysteresis curve and skeleton curve obtained from tests,a trilinear hysteretic restoring force model considering rigidity degradation is proposed for SRHSHPC frame joints,which includes a trilinear skeleton model,law of rigidity degradation and hysteresis rule.The model tallies with the test curves well and can be reference for elasto-plastic seismic analysis of SRC structures.

关 键 词：型钢混凝土结构 高强高性能混凝土 框架节点 恢复力模型 

分 类 号：TU528[建筑科学—建筑技术科学]