沙漠砂混凝土框架节点恢复力模型研究  

Research on restoring force model of desert sand concrete frame joints

作　　者：张华东 朱燕芳[2] 李志强[1] 王尧鸿[3] 董伟 ZHANG Huadong;ZHU Yanfang;LI Zhiqiang;WANG Yaohong;DONG Wei(College of Hydraulic and Civil Engineering College of Water Conservancy&Architectural Engineering,Shihezi University,Shihezi,Xinjiang 832003,China;College of Civiland Architectural Engineering,Nanchang Instituteof Technology,Nanchang,Jiangxi 330099,China;School of Civil Engineering,Inner Mongolia University of Technology,Hohhot,Inner Mongolia 010051,China;College of Civil Engineering,Inner Mongolia University of Science and Technology,Baotou,Inner Mongolia 014010,China)

机构地区：[1]石河子大学水利建筑工程学院,新疆石河子832003 [2]南昌工程学院土木与建筑工程学院,江西南昌330099 [3]内蒙古工业大学土木工程学院,内蒙古呼和浩特010051 [4]内蒙古科技大学土木工程学院,内蒙古包头014010

出　　处：《石河子大学学报（自然科学版）》2022年第5期591-597,共7页Journal of Shihezi University(Natural Science)

基　　金：国家自然科学基金(51668053)

摘　　要：为了探究沙漠砂混凝土框架节点的恢复力特性,对9个沙漠砂混凝土框架节点开展了拟静力实验。以轴压比、核心区配箍率、沙漠砂替代率为设计参数,对构件的破坏过程、破坏特征、骨架曲线、刚度退化、滞回规则等进行分析。基于试件的破坏特征,提出了三折线形骨架曲线模型。在滞回曲线的基础上回归分析出相关卸载刚度的表达式,并提出相应的滞回规则,最终得到沙漠砂混凝土框架节点的恢复力模型。结果表明:三折线形恢复力模型与实验结果吻合度较好,能够较好地模拟和反映构件的实际抗震性能,可为沙漠砂混凝土框架节点的弹塑性地震反应分析提供参考。In order to explore the restoring force characteristics of desert sand concrete frame joints,the quasi-static experiments of 9 desert sand concrete frame joints were carried out.Taking the axial compression ratio,stirrup ratio in the core area and desert sand replacement rate as design parameters,the failure process,failure characteristics,skeleton curves,stiffness degradation and hysteresis rules were investigated.Based on the failure characteristics of specimens,a trilinear skeleton curve model was proposed.Based on the hysteretic curve,the expression of unloading stiffness was obtained by regression analysis,and the corresponding hysteretic rules were proposed.Finally,the restoring force model of desert sand concrete frame joints was obtained.The results showed that the trilinear restoring force model was in good agreement with the experimental results,which can better simulate and reflect the actual seismic performance of components,and can provide reference for the elastoplastic seismic response analysis of desert sand concrete frame joints.

关 键 词：沙漠砂混凝土 框架节点 拟静力实验 恢复力模型 

分 类 号：TU375[建筑科学—结构工程]