异形钢管混凝土柱-板铰接节点性能试验研究  

Experimental study on a special-shaped concrete filled steel tubular column-slab hinge-joint

作　　者：张玉敏[1,2] 陈静[2] 孙翠娟 苏幼坡[2] 苏经宇[1] 

机构地区：[1]北京工业大学建筑工程学院,北京100022 [2]河北理工大学建筑工程学院,河北唐山063009 [3]济南市村镇建设服务中心,山东济南250001

出　　处：《建筑结构学报》2009年第S2期225-230,共6页Journal of Building Structures

基　　金：国家自然科学基金项目(50878073);唐山市建设局资助项目;河北理工大学科学研究基金项目(z200711)

摘　　要：进行了2组10个1/2缩尺的异形钢管混凝土柱-板中节点试件的冲切试验和低周反复水平荷载试验,研究了该铰接节点的冲切受力特性,并通过该试件的受力全过程、开裂荷载、最大荷载、破坏荷载以及在低周反复水平荷载下的破坏形态等,给出了5个试件的滞回环曲线、骨架曲线、托板应变曲线以及钢筋应变曲线。试验结果表明:异形钢管混凝土柱-板铰接节点冲切承载力略高于普通混凝土板柱节点;在重力荷载产生的剪力与板抗冲切承载力的比值超过0.7(GSR>0.7)时,异形钢管混凝土柱-板铰接节点发生冲切破坏之前,可抵抗2.5%以上的侧向位移,能够保证结构在大震下的安全;节点处托板应变平均值基本处于弹性阶段,变形性能良好,节点的局部弯矩较小,可由板作用在托板上的竖向力来平衡。Ten 1/2-scale interior column joint specimens were carried out under the punching load or the low-cycle reversal horizontal load respectively.The performances of joint under punching load were analyzed including the cracking load,maximum load,failure load and the punching shear failure pattern in low-cycle reversal horizontal load.Meanwhile the hysterisis loops,skeleton curves,and the strain curves of splint and steel bars along the slab width were also obtained.The experimental study has showed: the joint has a slightly higher punching shear capacity than the general slab-column connections;the high GSR(the ratio of shearing force resulted from the weight of superstructure to punching shear capacity of slabs,GSR>0.7) damage is not observed before the inter-story drift ratio reaches 2.5%;the splint is basically at the elastic stage.The local bending moment developed at the joint is low and it can be balanced by the vertical force acting on pallets.

关 键 词：异形钢管混凝土柱 柱-板铰接节点 冲切承载力 抗侧移能力 局部弯矩 

分 类 号：TU398.9[建筑科学—结构工程]