往复荷载作用下钢管混凝土格构式柱地震损伤模型及试验研究  

Seismic damage model and tests of CFST latticed columns under repeated load

作　　者：黄志 谌湘文 蒋丽忠[3] 周旺保[3] 熊陆增 戚菁菁[1] HUANG Zhi;CHEN Xiangwen;JIANG Lizhong;ZHOU Wangbao;XIONG Luzeng;QI Jingjing(School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Hunan Provincial Engineering Technology Research Center for Intelligently Prefabricated Passive House,Xiangtan 411201,China;School of Civil Engineering,Central South University,Changsha 410075,China)

机构地区：[1]湖南科技大学土木工程学院,湖南湘潭411201 [2]湖南省智慧建造装配式被动房工程技术研究中心,湖南湘潭411201 [3]中南大学土木工程学院,长沙410075

出　　处：《振动与冲击》2022年第19期157-163,206,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金资助(51808213);湖南省自然科学基金资助(2019JJ50185);湖南省教育厅科学研究优秀青年项目资助(20B214);湖南省教育厅科学研究重点项目资助(20A184);湖南科技大学博士科研启动基金项目资助(E51856)。

摘　　要：为了解巨型组合结构体系中钢管混凝土格构式柱的地震损伤情况,通过对4根四肢钢管混凝土格构柱低周往复荷载试验,得出了四肢钢管混凝土格构柱在低周往复荷载下的破坏形态和构件损伤特征。在试验分析基础上,对经典的Park-Ang损伤模型进行了修正,提出了适用于四肢钢管混凝土格构柱的损伤指数和耗能因子计算公式;并根据试验现象和各阶段特征,选取了经典的Park-Ang损伤模型、基于能量的损伤模型和改进的Park-Ang模型进行对比研究。结果表明:改进的Park-Ang模型能较好的判断四肢钢管混凝土格构柱的损伤程度,且通过损伤值可将构件损伤划分为是否可修、不可修但未破坏和不可修且将破坏三个阶段,并以损伤值0.4作为划分试件是否可修的界限。Here,to understand seismic damage of concrete-filled steel tubular(CFST)latticed column in mega composite structure system,failure mode and damage characteristics of limb CFST latticed column under low-cycle repeated load were obtained through low cycle repeated load tests of four limb CFST latticed columns.On the basis of test analysis,the classical Park-Ang damage model was modified,and calculation formulas for damage index and energy dissipation factor oflimb CFST latticed column were proposed.According to test phenomena and various stages’characteristics,the classical Park-Ang damage model,the energy-based damage model and the modified Park-Ang model werechosen for contrastive study.The results showed that the modified Park-Ang model can better judge damage degree of limb CFST latticed column;usingthe damage value,component damage can be divided into 3 stages of repairable,unrepairable but not damaged and unrepairable and to be damaged;the damage value of 0.4 is taken as the boundary to distinguishifa specimen is repairable.

关 键 词：四肢钢管混凝土格构柱 Park-Ang模型 试验研究 地震损伤模型 抗震性能 

分 类 号：TU393[建筑科学—结构工程]