方钢管高强混凝土柱抗震试验研究  

SEISMIC BEHAVIOR OF SQUARE HIGH STRENGTH CONCRETE-FILLED STEEL TUBULAR COLUMNS

作　　者：李斌[1] 马恺泽[2] 刘惠东 

机构地区：[1]内蒙古科技大学建筑与土木工程学院,内蒙古包头014010 [2]西安建筑科技大学土木工程学院,陕西西安710055 [3]西安有色冶金设计研究院,陕西西安710055

出　　处：《工程力学》2009年第A01期139-143,共5页Engineering Mechanics

基　　金：内蒙古自然科学基金项目(2007110201);内蒙古教育厅基金项目(NJ06141);包头市科技攻关项目(2006Z1004)

摘　　要：完成了8根方钢管高强混凝土柱在低周反复荷载作用下的试验,以轴压比、含钢率和长细比为试验参数,研究该类构件的破坏特征、滞回性能和变形能力,分析各参数对试验结果的影响。结果表明:试件的破坏为柱底部钢管截面被压曲、核心混凝土被压碎的,从而丧失承载力,属于压弯型破坏;试件的滞回曲线饱满,没有明显的捏缩现象;位移延性系数在3.05―4.07之间,满足结构抗震设计要求。表明方钢管高强混凝土柱具有良好的抗震性能。研究成果可为方钢管混凝土结构的工程实践提供参考。Eight square high strength concrete-filled steel tubular（HCFT） columns were tested under cyclic lateral load. The failure characteristics, hysteretic behavior, and deformability are investigated considering the variation of axial load ratio, steel ratio and slenderness ratio of the specimens. Experimental results show that 1） The failure modes of the column are mainly bucking of the steel tube and crash of core concrete at the base of the specimens; 2） The hysteretic curves of square HCFT column are not significantly pinched. The ductility coefficient is from 3.05 to 4.07, satisfying the requirements of seismic design; 3） Results indicate that square HCFT columns have excellent earthquake resistant capacities.

关 键 词：方钢管混凝土柱 高强混凝土 滞回性能 延性 抗震性能 

分 类 号：TU398[建筑科学—结构工程]