叠合板式综合管廊底部节点低周反复荷载试验  

Cyclic loading tests on the bottom connections of a municipal tunnel composed of composite walls and CIP bottom slabs

作　　者：胡翔[1] 白浩阳 薛伟辰[1] 黄建波 HU Xiang;BAI Haoyang;XUE Weichen;HUANG Jianbo(College of Civil Engineering, Tongji University, Shanghai 200092, China;The Municipal Engineering Co., LTD of CTCE Group, Hefei 230041, China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]中铁四局集团有限公司市政工程分公司,安徽合肥230041

出　　处：《哈尔滨工程大学学报》2021年第2期200-207,共8页Journal of Harbin Engineering University

基　　金：住建部科研项目(K42016256);上海市住建委科研项目(2009-001-006).

摘　　要：为了研究底板现浇叠合板式综合管廊底部边节点和中节点的抗震性能,本文开展了4个节点足尺模型的低周反复荷载试验。4个节点足尺模型分别为叠合板式边节点(PCJ1)和中节点(PCJ2),以及相应的现浇节点(RCJ1和RCJ2)。其中,2个边节点均设角部加腋,2个中节点角部无加腋。在此基础上,开展了叠合板式综合管廊底部节点的安全性评价。研究表明:叠合板式节点与现浇节点的破坏形态基本一致,均为壁板或底板角部截面受弯破坏;叠合板式节点与对应现浇节点的滞回曲线相近,但现浇节点的滞回曲线更饱满;叠合板式节点的承载力总体上略高于对应的现浇节点(PCJ1比RCJ1高约2%,PCJ2比RCJ2高约17%);4个节点的延性系数在2.14~6.61,均具有较好的延性;叠合板式节点与现浇节点的刚度退化规律相近,但耗能能力相对较低。In order to investigate the seismic behaviors of the bottom connections of a municipal tunnel composed of composite walls and cast-in-place(CIP)bottom slabs,four full-scale specimens were tested under low reversed cyclic loading.The specimens included one exterior composite connection PCJ1,one interior composite connection PCJ2,and the corresponding CIP connections RCJ1 and RCJ2.Note that the haunch was designed in the exterior connections.The test results revealed that the failure patterns of the composite connections and CIP connections were both characterized by flexural failure at the end section of the vertical or bottom slabs.The hysteresis loops of the composite and CIP connections were similar to each other,while those of CIP connections were relatively plumper.The loading capacities of the composite connections were slightly higher than those of the CIP connections(PCJ1 was approximately 2%higher than RCJ1,and PCJ2 was approximately 17%higher than RCJ2).The ductility coefficients of the specimens ranged from 2.14 to 6.61,indicating that all the specimens behaved in a ductile manner.The stiffness degradations of the composite connections were similar to those of the CIP connections,while the energy dissipation of the composite connections was relatively lower.On this basis,the safety margins of the composite connections were evaluated.

关 键 词：叠合板式综合管廊 底板现浇 底部节点 低周反复荷载试验 抗震性能 承载力 延性 安全性评价 

分 类 号：TU375.1[建筑科学—结构工程]