腐蚀与荷载耦合作用下混凝土柱徐变机理研究  

Study on creep mechanism of concrete column under the coupling effect of corrosion and loading

作　　者：廖世杰 曹国辉[2] 王礼彬 肖勇刚[1] LIAO Shijie;CAO Guohui;WANG Libin;XIAO Yonggang(School of Civil Engineering,Changsha University of Science&Technology,Changsha,Hunan 410114,China;School of Civil Engineering,Hunan City University,Yiyang,Hunan 413000,China)

机构地区：[1]长沙理工大学土木工程学院,长沙410114 [2]湖南城市学院土木工程学院,湖南益阳413000

出　　处：《湖南城市学院学报（自然科学版）》2023年第1期1-5,共5页Journal of Hunan City University:Natural Science

摘　　要：为了研究腐蚀与荷载耦合作用下钢筋混凝土柱的徐变行为,分别对轴压、小偏压和大偏压3种受力状态的钢筋混凝土柱进行了腐蚀与荷载共同作用下的长期性能试验,并结合试验提出了不同钢筋锈蚀状况下的理论徐变修正模型.研究结果表明:钢筋混凝土柱在相同受力状态下,当钢筋轻度腐蚀时的混凝土徐变略低于未锈蚀试件;当钢筋为重度腐蚀时,相较于未锈蚀试件,混凝土徐变出现了较大增长;经验证,实测值与模型理论值吻合较好.In order to study the creep behavior of reinforced concrete columns under the coupling effect of corrosion and loading,long-term performance tests of reinforced concrete columns under axial compression,small bias and large bias were carried out respectively under the combined action of corrosion and load.Combined with the experiments,the theoretical creep correction model under different steel bar corrosion conditions is proposed.The results show that the creep of reinforced concrete columns is slightly lower than that of uncorroded specimens when the steel bar is slightly corroded under the same stress state.When the steel bar is heavily corroded,the creep of concrete increases greatly compared with that of non-corroded specimens.The theoretical value of the model is in good agreement with the measured value.

关 键 词：钢筋混凝土柱 钢筋不均匀锈蚀 徐变 修正系数法 

分 类 号：U444[建筑科学—桥梁与隧道工程]