钢筋加劲T形截面钢管混凝土柱抗震性能试验研究  

Experimental research on seismic behavior of T-shaped concrete-filled steel tube columns with reinforcement stiffeners

作　　者：杨远龙[1,2] 王玉银[2] 张素梅[2] 

机构地区：[1]兰州大学西部灾害与环境力学教育部重点试验室,甘肃兰州730000 [2]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《建筑结构学报》2012年第4期104-112,共9页Journal of Building Structures

基　　金：中央高校基本科研业务费专项资金(lzujbky-2012-21);国家自然科学基金项目(51178146)

摘　　要：制作4根钢筋加劲的T形截面钢管混凝土柱、1根非加劲T形截面钢管混凝土柱和1根T形截面钢筋混凝土柱试件,对其进行低周往复水平荷载作用下的滞回性能试验,研究其破坏模式和滞回性能,分析钢筋加劲肋的作用机理以及钢管对混凝土的约束作用。结果表明:相比T形截面钢筋混凝土柱,T形截面钢管混凝土柱破坏程度有明显减轻,刚度、承载力以及耗能性能均有明显提高;钢筋加劲肋能有效限制钢板局部屈曲和阴角处钢管与混凝土脱离,保证钢管和混凝土共同工作,对拉钢筋加劲肋相对锯齿形钢筋加劲肋的效果更加显著;含钢率较高的钢管混凝土柱承载力更高,耗能能力更好;轴压比从0.2增加到0.4时,钢筋加劲的T形截面钢管混凝土柱的承载力增大,延性降低。Five T-shaped concrete-filled steel tube（CFST） column specimens including four stiffened columns and one non-stiffened column and one reinforced concrete（RC） column were fabricated and researched by quasi-static experiment under cyclic loading.Failure modes and hysteretic properties of specimens were investigated.The mechanism of reinforcement stiffeners and the constraining effect provided by T-shaped tube were also studied.Experimental results reveal that： compared with T-shaped RC columns,T-shaped CFST columns have positive effect on failure mode,initial stiffness,bearing capacity and energy dissipation capacity;the reinforcement stiffeners can effectively postpone steel tube＇s local buckling and restrain separation of steel tube and concrete at concave corners,to guarantee the interaction of steel tube and concrete;due to fully utilization of stiffeners＇ tension capacity,the tension reinforcement stiffeners＇ restricting function is more significant than that of serrated-shaped reinforcements;the CFST columns with larger steel ratio have high bearing capacity and better energy dissipation capacity;with the axial compressive ratio varying from 0.2 to 0.4,the bearing capacity of CFST specimens increases but the ductility decreases.

关 键 词：T形截面钢管混凝土柱 钢筋加劲肋 拟静力试验 抗震性能 

分 类 号：TU398.2[建筑科学—结构工程] TU528.59