带有芯钢管的圆钢管混凝土中节点抗震性能试验研究  

Experimental study on seismic performance of mid-point in the concrete filled circular steel tubular with core steel tube

作　　者：王毅红[1] 高磊 关宏洁[3] 高翔[1] 

机构地区：[1]长安大学建筑工程学院,陕西西安710061 [2]中国建筑西北设计研究院,陕西西安710018 [3]西安欧亚学院,陕西西安710065

出　　处：《四川建筑科学研究》2012年第6期160-163,共4页Sichuan Building Science

基　　金：陕西省自然科学基金项目(2006E208)

摘　　要：对一种有芯钢管的钢管混凝土柱与钢筋混凝土梁的连接节点进行研究,该种节点中断节点区钢管混凝土柱的外钢管,使钢筋混凝土梁中的纵筋在节点区直通。通过2个缩尺节点模型在低周反复荷载作用下的拟静力试验,验证该种节点承受反复荷载的合理性和可行性。试验表明,试件破坏始于梁受弯塑性铰的出现,直到试件达到极限承载力,节点区芯钢管、竖筋、箍筋、混凝土均完好,节点符合"强柱弱梁,强节点弱构件"的抗震要求。试验所得滞回曲线反映节点试件具有较好的耗能能力和位移延性。观察试件的破坏形态,节点核心区芯钢管、竖筋没有出现锚固破坏现象,说明节点芯钢管锚固长度足够,节点构造合理。A new kind of joint is analyzed in this paper,which joins the RC beam and CFST column together. This joint interrupts the outer steel pipe of CFST column, so the longitudinal bar in the RC beam could pass through the joint. By two joint of scale model under low reversed cyclic loadings,verify the feasibility and rationality of this joint. Specimens are damaged begin with plastic hinge occurring. Until the specimens reach the ultimate bearing capacity, the core of steel tube, vertical steel, stirrup and concrete are in good condition. The joint satisfy the seismic behavior of ＂strong column-weak beam, strong joint-weak structure unit＂. The hysteretic curves reflect that the joint have good bearing capacity and ductility. Observing the failed specimens, the anchoring failure of the core steel tube in joint core position does not appear which indicate that the anchorage length of the core of steel tube is adequate, the structure of the joint is reasonable.

关 键 词：钢管混凝土 芯钢管 节点 抗震性能 轴压比 试验研究 

分 类 号：TU375[建筑科学—结构工程]