吊顶龙骨节点和拼接点轴向受力性能试验研究  

EXPERIMENTAL STUDY ON THE AXIAL BEHAVIOR OF GRID JOINTS AND SPLICES OF SUSPENDED CEILINGS

作　　者：蒋欢军[1,2] 王勇[1,2] 吴宸 JIANG Huan-jun;WANG Yong;WU Chen(State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China;Department of Disaster Mitigation for Structures,College of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学土木工程防灾国家重点试验室,上海200092 [2]同济大学土木工程学院结构防灾减灾工程系,上海200092

出　　处：《工程力学》2022年第7期30-38,80,共10页Engineering Mechanics

基　　金：同济大学地震工程国际合作联合实验室项目(0200121005/058);上海市优秀学术带头人计划项目(18XD1403900)。

摘　　要：吊顶是震害突出的一类非结构构件,吊顶龙骨节点和拼接点失效是吊顶破坏的主要原因之一。该文对吊顶主龙骨拼接点、主次龙骨节点和边节点开展了轴向单调加载和低周往复加载试验,考察了各类节点和拼接点的破坏模式、承载力、变形能力和滞回性能,并基于试验数据建立了节点和拼接点的易损性曲线。研究结果表明,主龙骨拼接点的破坏模式为拼接点拉出破坏,主次龙骨节点的破坏模式为节点压屈破坏,边节点的破坏模式为节点拉出破坏。边节点的形式和端部龙骨的类型对边节点的破坏模式和承载能力影响小,宜采用螺钉将抗震夹与吊顶边界固定以提高边节点的抗震能力。Suspended ceiling system is a type of nonstructural component suffering significant damage during earthquakes.The failure of the ceiling grid joints and splices is one of the major reasons for the ceiling damage.A series of tests on main tee splices,main-cross tee joints and peripheral joints under axial monotonic and cyclic loadings were conducted.The failure modes,load-bearing capacity,deformation capacity,and hysteretic behavior of different joints and splices were investigated.The fragility curves of the joints and splices were established based on the test data.The test results indicate that the failure mode of the main tee splices is the pulling out of the splices,that the failure mode of the main-cross tee joints is the buckling of the joints,and that the failure mode of the peripheral joints is the pulling out of the joints.The types of peripheral joints and end grids have little effect on the failure modes and loading-bearing capacity of the peripheral joints.Seismic clips should be fixed with the ceiling perimeter using screws to improve the seismic capacity of the peripheral joints.

关 键 词：吊顶系统 龙骨节点和拼接点 抗震性能 静力试验 易损性分析 

分 类 号：TU8[建筑科学] P315.9[天文地球—地震学]