不同加载制度下型钢混凝土柱抗震性能试验研究  

EXPERIMENTAL STUDY ON SEISMIC BEHAVIOR OF STEEL REINFORCED CONCRETE COLUMNS UNDER DIFFERENT LOADING SYSTEMS

作　　者：蒋连接[1,2] 白国良[2] 高立 罗海艳[1] 朱浩[1] 郎龑 JIANG Lianjie;BAI Guoliang;GAO Li;LUO Haiyan;ZHU Hao;LANG Yan(Department of Architectural Engineering,Suqian College,Suqian 223800,China;School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]宿迁学院建筑工程学院,江苏宿迁223800 [2]西安建筑科技大学土木工程学院,西安710055

出　　处：《工业建筑》2020年第12期112-118,共7页Industrial Construction

基　　金：国家自然科学基金项目(51878544);江苏省高校自然科学研究项目(18KJD560005,20KJB560012);宿迁市科技计划项目(Z2018218,Z2019107);宿迁学院科研基金项目(2016KY05)。

摘　　要：通过3榀型钢混凝土柱的拟静力试验,研究不同加载制度下型钢混凝土柱的抗震性能。结果表明:1)远场加载制度下,随着同级位移循环次数的增加,试件的损伤程度加深、承载力降低幅度加大、耗能能力增强;位移角不超过1/50时,循环次数对试件的抗震性能影响较小,位移角1/40时,循环次数对试件的抗震性能影响显著;试件的极限变形和达到极限位移时的单周滞回耗能、等效黏滞阻尼比小,延性和极限耗能能力差。2)近场加载制度下,试件的裂缝数量少、混凝土压碎区域大,初始极限位移加载后试件的承载力大大降低,耗能能力得到充分发挥;试件的极限变形和达到极限位移时的单周滞回耗能、等效黏滞阻尼比大,延性和极限耗能能力强;再次增大位移加载,位移角不超过1/50时,试件的承载力和耗能能力变化很小,位移角1/40时,试件的承载力急剧降低、耗能能力快速增强。Quasi-static loading tests of three SRC columns were conducted to compare the seismic behavior of SRC columns under different loading systems.The results showed that under the far-field loading system,the damage degree of specimen deepened,the bearing capacity of specimen decreased and the energy dissipation capacity of specimen enhanced with the increase of equal displacement cycle number;the cycle number had little effect on seismic behavior as the drift ratio was less than 1/50,and had significant effect on seismic behavior at the drift ratio 1/40;the ultimate deformation,one-cycle hysteresis energy dissipation and equivalent viscous damping coefficient reaching ultimate displace of specimen were small,the ductility and ultimate energy dissipation capacity of specimen were poor.Under the near-field loading system,the crack number of specimen was small and the concrete crushing area of specimen was large,the bearing capacity of specimen was reduced greatly after enduring the initial ultimate displacement loading,and the energy dissipation capacity of specimen was developed fully;the ultimate deformation,one-cycle hysteresis energy dissipation and equivalent viscous damping coefficient reaching ultimate displace of specimen were large,the ductility and ultimate energy dissipation capacity of specimen were strong;when loading against with increasing displacement,the bearing capacity and energy dissipation capacity of specimen had little change as the drift ratio was less than 1/50,and the bearing capacity of decreased sharply and the energy dissipation capacity increased rapidly at the drift ratio 1/40.

关 键 词：远场加载制度 近场加载制度 型钢混凝土柱 抗震性能 拟静力试验 

分 类 号：TU398.9[建筑科学—结构工程] TU352.11