负载下外包钢筋混凝土加固钢柱的水平极限承载力参数分析  

Parameter analysis of horizontal ultimate bearing capacity of steel column strengthened with enclosed reinforced concrete under load

作　　者：蔡静 陈振明 蒋友宝 黄世涛 王福明 刘志 Cai Jing;Chen Zhen-ming;Jiang You-bao;Huang Shi-tao;Wang Fu-ming;Liu Zhi(Colege of Civil Engineering,Changsha University of Science and Technology,Changsha 410012,China;China Construction Steel Structure Engineering Co.Ltd,Shenzhen 518118,China;Hunan Aohai Real Estate Development Co.Ltd,Changsha 410219,China)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410012 [2]中建钢构工程有限公司,广东深圳518118 [3]湖南澳海房地产开发有限公司,湖南长沙410219

出　　处：《工程抗震与加固改造》2023年第2期154-161,共8页Earthquake Resistant Engineering and Retrofitting

基　　金：“十三五”国家重点研发计划(2018YFC0704900)。

摘　　要：为研究负载下外包钢筋混凝土加固型钢柱的水平承载性能,考虑钢柱轴压比、型钢与混凝土之间的摩擦系数、栓钉设置等因素,采用有限元方法分析该柱水平极限承载力随各影响因素的变化规律。结果表明:对于外包钢筋混凝土加固工字钢柱,即使型钢表面不布设栓钉,钢柱的水平极限承载力仍较加固前有较大提高,且提高幅度随钢柱轴压比的增大而增加;当柱端型钢布设栓钉范围超过1/4柱长时,加固后钢柱的水平极限承载力会随栓钉沿钢柱高度方向的布设范围增加而略有增大,且随钢柱轴压比增加而大幅提升。To study on horizontal bearing capacity of steel column strengthened with enclosed reinforced concrete under load,considering the axial compression ratio of steel column,the friction coefficient between steel and concrete,the stud set etc.,the varying laws of horizontal ultimate bearing capacity with the different factors are analyzed by the finite element method for steel column.The results show that in the case of no studs,the horizontal ultimate bearing capacity can be strengthened effectively for steel column with the enclosed reinforced concrete than that before reinforcement,and the increasing amplitude increases with the increasing of the axial compression ratio of steel column;when the distribution range of studs is more than 1/4 of the steel column length,the horizontal ultimate bearing capacity of the reinforced steel column increases slightly with the increase of the range of studs along the height of the steel column,and greatly increases with the increase of the axial compression ratio of steel column.

关 键 词：外包钢筋混凝土钢柱 负载下加固 水平极限承载力 参数分析 钢柱轴压比 摩擦系数 

分 类 号：TU391[建筑科学—结构工程]