异形钢管混凝土组合柱-钢梁顶底角钢连接节点抗震性能研究  

Study on Earthquake Resistance Behavior of Top and Seat Angle Joint of Special-shaped Concrete-filled Rectangular Composite Tubular Column with Steel Beam

作　　者：刘记雄[1] 戴绍斌[1] 霍凯成[1] 黄俊[1] 林明森[1] 

机构地区：[1]武汉理工大学土木工程与建筑学院,湖北武汉430070

出　　处：《四川大学学报（工程科学版）》2015年第1期128-137,共10页Journal of Sichuan University (Engineering Science Edition)

基　　金：湖北省自然科学基金资助项目(2012FFB05112);中央高校基本科研业务费专项资金资助项目(WUT:2014-IV-125)

摘　　要：为研究异形钢管混凝土组合柱-钢梁顶底角钢连接节点的抗震性能,对节点试件进行低周往复荷载试验及ANSYS非线性有限元分析。结果表明:破坏源于节点区钢梁翼缘屈曲,顶底角钢屈服形成塑性铰,节点产生大转动变形;各试件滞回曲线较为饱满,呈倒"S"形,延性系数均大于2.55,节点具有较好的耗能能力;角钢厚度、高强螺栓直径对节点承载力和变形能力影响显著,增大角钢厚度及高强螺栓直径,节点延性系数略有降低,但极限承载力明显提高;有限元节点应力分布及破坏特征与试验现象基本一致,屈服承载力、极限承载力有限元计算值与试验值吻合较好;轴压比对节点抗震性能影响较小,相较于螺栓性能等级,钢材强度等级对节点刚度及承载力影响更为显著。In order to study earthquake resistance behavior of top and seat angle joint of special-shaped concrete-filled rectangular composite tubular column with steel beam,the low cyclic loading experiment and ANSYS nonlinear finite element analysis on the joints were conducted. The results indicated that the destruction of joints derives from buckling of steel beam flange and yielding of top and seat angle steel,then plastic hinges are formed and a large rotation deformation is generated. The shapes of hysteresis curves of all specimens are full and present inverted 'S',the displacement ductility factors are greater than 2. 55,and the energy dissipation capacities of all specimens are good. There is a great influence of top and seat angle thickness and high-strength bolt diameter on the bearing capacity of joints. If the thickness of top and seat angle and the diameter of high-strength bolt are increased,the displacement ductility factors of joints are decreased slightly,but ultimate bearing capacities are obviously enhanced.The stress distributions and the finite element failure characteristics of joints are basically consistent with the test phenomena,and yield bearing capacity and ultimate bearing capacity of the finite element calculations agree well with the experimental results; there is little effect of axial compression ratio on the earthquake resistance behavior of joint. Compared with high-strength bolt,there is a more significant influence of top and seat angle on the stiffness and bearing capacity of joint.

关 键 词：异形钢管混凝土组合柱 抗震性能 非线性有限元分析 极限承载力 

分 类 号：TU398.9[建筑科学—结构工程] TU352.11