全装配RC楼盖结构振动台试验与平面内刚度分析  

Shaking table test with discretely connected precast RC diaphragm structure and in-plane stiffness analysis

作　　者：庞瑞[1] 徐科 徐铸 路晓军 PANG Rui;XU Ke;XU Zhu;LU Xiaojun(School of Civil Engineering,Henan University of Technology,Zhengzhou 450001,China;State Gird Henan Economic Research Institute,Zhengzhou 450001,China)

机构地区：[1]河南工业大学土木工程学院,郑州450001 [2]国网河南省电力公司经济技术研究院,郑州450000

出　　处：《建筑结构》2023年第14期1-7,共7页Building Structure

基　　金：国家自然科学基金(51778214);中原青年拔尖人才项目(ZYQR201912170);河南工业大学自科创新基金支持计划(2022ZKCJ05);河南省粮油仓储建筑与安全重点实验室开放课题(2021KF-02)。

摘　　要：为研究采用分布式连接全装配RC楼盖(DCPCD)结构抗震性能,依据一致相似律设计制作了缩尺比例为1/4的单跨两开间四层全装配RC楼盖框架-剪力墙结构振动台试验模型。建立了考虑DCPCD平面内弹性变形的等效梁、连接件模型和现浇结构对比模型,分析了三种模型的动力特性与地震响应。进行了模型结构在水平地震激励下的振动台试验。结果表明:欠人工质量模型是合理可行的,模型重力效应可达到应有重力效应的63%以上,减小了重力失真效应对试验结果的不利影响;等效梁模型与连接件模型两种分析方法能较好地模拟DCPCD结构的地震响应;水平地震作用下DCPCD发生了较大的平面内变形,使地震响应与现浇结构存在较大差异;DCPCD不满足国内外规范对刚性楼盖的规定,建议抗震设计时考虑楼盖的平面内变形对地震作用计算和抗震分析的影响。In order to study the seismic performance of the structure with distributed connection precast RC diaphragm(DCPCD),a single span,two bay,four story full assembly RC floor frame-shear wall structure with a scale of 1:4 was designed and manufactured according to the uniform similarity law.The equivalent beam,connection element model and cast-in-place structure comparison model considering the in-plane elastic deformation of DCPCD were established,the dynamic characteristics and seismic response of the three models were analyzed.The shaking table test of the model structure under horizontal earthquake excitation was carried out.The results show that the under artificial mass model is reasonable and feasible.The gravity effect of the model can reach more than 63%of the expected gravity effect,which reduces the adverse effect of gravity distortion on the test results.The equivalent beam model and the connection element model can simulate the seismic response of DCPCD structure better.The DCPCD has a large in-plane deformation under the action of horizontal earthquake,which makes the seismic response of the structure different from that of the cast-in-place structure.DCPCD does not meet the requirements of domestic and international codes for rigid floor.It is suggested that the influence of in-plane deformation on seismic calculation and seismic analysis of the floor should be considered in seismic design.

关 键 词：分布式连接全装配RC楼盖 动力特性 平面内刚度 框架-剪力墙结构 振动台试验 相似比 

分 类 号：TU399[建筑科学—结构工程] TU317.1