摘要
采用电化学加速锈蚀方法获取16个不同锈蚀程度的RC柱,并利用钢管混凝土加固法对其中9个锈蚀RC柱进行加固。通过轴心受压试验,获得锈蚀RC柱和加固柱的承载力和荷载–纵向变形曲线。在试验研究基础上,建立了钢管混凝土加固锈蚀RC柱轴压性能有限元模型,并将有限元计算结果与试验结果进行对比分析,研究结果表明所建有限元模型可以较为准确地计算钢管混凝土加固锈蚀RC柱的轴压性能。基于此,利用该模型对加载过程中加固柱各部分的应力分布、发展情况和钢管对核心混凝土的约束作用进行详细分析,进一步揭示加固柱的受力机理。
The electrochemical accelerated corrosion method is used to obtain 16 corroded RC columns with different corrosion degrees,and 9 of them are strengthened with concrete-filled steel tubes.Through the axial compression test,bearing capacity and load-deformation curve of the corroded RC column and the strengthened column are obtained.Based on the experimental research,finite element models of strengthened RC columns are established,and the finite element calculation results are compared with the experimental results.It indicates that the built finite element models can more accurately calculate the axial compression performance of strengthened RC columns.Based on the verified models,the stress distribution and development of each part of the composite columns during the loading process and the restraint effect of the steel tubes on the core concrete are analyzed.The mechanism of the strengthened columns is further revealed.
作者
蒋燕鞠
卢亦焱
梁鸿骏
李旺鹏
JIANG Yanju;LU Yiyan;LIANG Hongjun;LI Wangpeng(School of Civil Engineering,Wuhan University,Wuhan 430072,China)
出处
《土木工程与管理学报》
2021年第3期140-145,179,共7页
Journal of Civil Engineering and Management
基金
国家自然科学基金(51708240
51978539)。
关键词
加固
钢管混凝土
锈蚀RC柱
轴压性能
有限元分析
strengthening
concrete filled steel tubes
corroded RC column
axial behavior
finite element analysis
