长周期地震动作用下型钢混凝土柱抗震性能研究  

Study on seismic behavior of steel reinforced concrete columns under long period ground motions

作　　者：蒋连接[1,2] 马静[1] 朱方之[1] 左工[1] 施云 高立 李泽良[1] JIANG Lianjie;MA Jing;ZHU Fangzhi;ZUO Gong;SHI Yun;GAO Li;LI Zeliang(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,陕西西安710055

出　　处：《混凝土》2020年第10期59-62,71,共5页Concrete

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(15KJB580012,18KJD560005);江苏省第五期“333工程”培养资金资助项目(BRA2017273);宿迁市科技计划项目(Z2018218);宿迁学院科研基金项目(2016KY05)。

摘　　要：对2榀SRC柱分别进行远场加载制度和近场加载制度下的拟静力试验,研究了长周期地震动作用下SRC柱的抗震性能。结果表明:远场长周期地震动作用下,达到峰值荷载前,位移循环次数对试件的承载力和耗能能力的影响很小;达到极限状态时,位移多次循环产生的累积损伤对试件的承载力和耗能能力的影响显著,随着位移循环次数的增加,承载力降低幅度明显加大,耗能能力不断增强。近场脉冲型地震动作用下试件的承载力、割线刚度均小于远场长周期地震动作用下的试件,但耗能能力更强。遭遇近场脉冲型地震后重新加载时,试件的承载力、割线刚度会出现一定程度的降低,耗能能力有所增强,损伤和破坏程度加剧。Quasi-static loading tests of two SRC columns under far-field loading system and near-field loading system were conducted respectively to study the seismic behavior of SRC columns under long period ground motions.The results show that under far-field long period ground motion,displacement cycle number has little effect on the load-carrying capacity and energy dissipation capacity of specimen before reaching the peak load.When reaching the limit state,cumulative damage caused by multiple displacement cycles has a significant effect on the load-carrying capacity and energy dissipation capacity of specimen.With the increase of displacement cycles,the reduction of load-carrying capacity increases obviously,and the energy dissipation capacity increases.The load-carrying capacity and secant stiffness of specimen under near-field impulsive ground motion are less than those under far-field long period ground motion,but the energy dissipation capacity is stronger.When the specimen are reloaded after near-field impulse earthquake,the load-carrying capacity and secant stiffness of specimen will be reduced to a certain extent,the energy dissipation capacity will be enhanced,and the degree of damage and damage will be aggravated.

关 键 词：长周期地震动 加载制度 型钢混凝土柱 抗震性能 拟静力试验 

分 类 号：TU528.01[建筑科学—建筑技术科学]