空间钢管混凝土柱-环梁节点抗震机理试验研究  

Experimental study on seismic behavior of concrete filled steel tubular column-to-RC ring beam joints in three dimensional frames

作　　者：王伟[1] 李万祺 陈以一[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092 [2]宝钢建筑系统集成有限公司,上海201900

出　　处：《建筑结构学报》2013年第S1期66-72,共7页Journal of Building Structures

基　　金：国家自然科学基金重点项目(51038008)

摘　　要：为深入了解圆钢管混凝土柱-钢筋混凝土环梁节点的抗震性能与传力机理,对4个空间内柱节点进行了双向低周反复加载试验。试验研究参数为环梁纵筋量与框架梁纵筋量的比值以及环梁配箍量。试验结果表明:环梁节点依靠环-柱相互作用传递外荷载;环梁沿圆周方向呈现出包含拉、弯、剪、扭的组合受力特征;环梁纵筋和箍筋的配置量对节点抗震性能影响较大。经过合理设计的钢管混凝土柱-环梁节点具有良好的延性,适合地震区的工程应用。Bidirectional cyclic loading tests on four 3D interior column joint specimens were conducted to evaluate the seismic performance and load transferring mechanism of concrete filled steel tubular column-to-RC ring beam joints.The test parameters included longitudinal reinforcement ratios of the ring beam to that of the frame beam and hoop reinforcement volume for the ring beam.Test results show that the load resistances are mainly provided by the interaction between the ring beam and the column.Complex internal force condition including the combination of tension,bending,shear and torsion is induced in the ring beam along the circumferential direction.Both the longitudinal reinforcements and stirrups are very crucial to improve the seismic performance of the connection system.The concrete filled steel tubular column-to-RC ring beam joints with reasonable design are observed to have good ductility and suitable for seismic resistant application.

关 键 词：钢管混凝土柱 钢筋混凝土环梁式节点 往复加载试验 传力机理 

分 类 号：TU398.9[建筑科学—结构工程]