装配式钢管混凝土柱-盖梁节点抗震性能试验研究  

Experimental study on seismic behavior of assembly CFST column-to-cap beam connections

作　　者：朱海清[1,2] 李营[1] Max Stephens 张谢东[1] 车晓军[1] 

机构地区：[1]武汉理工大学,湖北武汉430063 [2]华盛倾大学,美国西雅图WA98105

出　　处：《土木工程学报》2017年第8期29-37,共9页China Civil Engineering Journal

基　　金：国家自然科学基金(51408450)

摘　　要：装配式钢管混凝土柱-盖梁节点施工简单、工期短,逐渐在桥梁建设中广泛运用。提出一种带抗剪环的新型钢管混凝土柱-盖梁节点,介绍装配式节点在桥梁施工中的施工工序。设计7个钢管直径超过508mm的大规模节点试件,通过低周反复荷载试验对6个抗剪环节点和1个钢筋笼节点进行了地震响应分析。对比分析节点的破坏形态、有效刚度、延性、滞回性能和极限承载能力等力学特性,得到如下结论:钢管混凝土柱出现初始撕裂时的位移随着构件的有效刚度增大而增大,盖梁的开裂情况则随着钢管混凝土柱埋深的增加而减少。埋深相近的情况下,抗剪环节点的极限荷载承载力大于钢筋笼节点;抗剪环节点的整体延性随着径厚比D/t的增大而减小。For the advantages of easy construction and accelerated construction, the assembly CFST column-to-cap beam connections are popularly used in the bridge construction. The assembling process of precast members is introduced. 7 large scale specimens with the column diameter larger than 508mm are designed for the cyclic loading tests, and the seismic responses of 6 shear ring connections and 1 steel damage behavior, equivalent stiffness, ductility capacity, cage connection are analyzed. hysteretic capacity, conclusions Based on the comparison of a- obtained as follows： the drift at the initial tearing of the steel tube will increase with the equivalent stiffness of the composite column. The cracking level of the cap beam will decrease with the CFST column embedded length. When the embedded length values are similar, the ultimate loading capacity of ER connection is larger than that ductility of the ER connections will decrease with the D/t value, which means of the RC connection. Furthermore, the tube diameter divides by tube thickness.

关 键 词：钢管混凝土结构 装配式节点 低周反复荷载试验 抗震行为 

分 类 号：TU398.9[建筑科学—结构工程]