同级位移多次循环作用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 repeated equal displacement cycles

作　　者：蒋连接[1,2] 白国良[1] 左工[2] 颜军[2] 罗海艳[2] JIANG Lianjie;BAI Guoliang;ZUO Gong;YAN Jun;LUO Haiyan(School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China;Department of Architectural Engineering, Suqian College, Suqian 223800, China)

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

出　　处：《世界地震工程》2020年第3期48-56,共9页World Earthquake Engineering

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);陕西省自然科学基础研究计划项目(2019JM-597);宿迁市科技计划项目(Z2018218,Z2019107);宿迁学院科研基金项目(2016KY05)。

摘　　要：为研究远场长周期地震动作用下SRC柱的抗震性能,对5个不同含钢率和配箍率的SRC柱进行同级位移循环加载10次的拟静力试验,分析其抗震性能指标。结果表明:同级位移循环次数对SRC柱抗震性能的影响与循环位移幅值有关。位移角不大于1/50时,同级位移循环次数对SRC柱的裂缝发展、承载力退化和耗能能力的影响均很小;位移角1/40时,随着位移循环次数的增加,SRC柱的裂缝不断发展,角部混凝土逐渐掉落,承载力退化幅度开始加大,耗能能力逐渐增强,损伤程度增长较快;位移角1/33时,同级位移多次循环导致SRC柱的损伤急剧发展,承载力快速降低,耗能能力明显增强,破坏程度显著加重。提高含钢率和配箍率均可以改善SRC柱的抗震性能。Quasi-static displacement loading tests with ten cycles for each of the amplitudes on five SRC columns with various steel content and stirrup ratio were conducted to study the seismic performance of SRC columns under far-field Long period ground motions,and the seismic performance indices were analyzed.The results show that the influence of the equal displacement cycle number on the seismic performance of SRC columns is related to the cyclic displacement amplitude.When the drift ratio is less than 1/50,the influence of equal displacement cycle number on the crack development,strength degradation and energy dissipation capacity of SRC columns is very small.At the amplitude of 1/40 drift ratio,with the increase of displacement cycle number,the cracks continue to develop,the corner concrete drops gradually,the strength degradation begins to increase,and the energy dissipation capacity increases gradually.At the amplitude of the 1/33 drift ratio,the damage of SRC columns develops rapidly,the strength decreases rapidly,the energy dissipation capacity increases obviously,and the damage degree aggravates significantly.The seismic performance of the SRC columns can be improved by increasing the steel content or stirrup ratio.

关 键 词：型钢混凝土柱 抗震性能 同级位移循环次数 承载力 变形能力 耗能能力 

分 类 号：TU398.9[建筑科学—结构工程]