某超长隔震结构温差变形模拟与监测分析  

Simulation and monitoring analysis of temperature deformation of a certain ultra long isolation structure

作　　者：张恒 吴振军 刘汇东 李佳佳 韩学标 陈伟 李梁 赵刚 李晨晨 褚少龙 ZHANG Heng;WU Zhen-jun;LIU Hui-dong;LI Jia-jia;HAN Xue-biao;CHEN Wei;LI Liang;ZHAO Gang;LI Chen-chen;CHU Shao-long(China Construction Third Engineering Bureau Group Co.,Ltd.,Wuhan 430071,China)

机构地区：[1]中建三局集团有限公司,湖北武汉430071

出　　处：《空间结构》2024年第4期75-82,共8页Spatial Structures

基　　金：中国建筑股份有限公司项目(CSCEC-2020-Z-30);中建三局集团有限公司西北公司课题(CSCEC3B-XB-2023-10)。

摘　　要：超长隔震结构在结构底部设置柔性隔震层,在温度作用和混凝土收缩影响下上部结构的变形在隔震层充分释放,使得隔震支座产生较大变形,严重时会影响结构安全.为了保证结构在施工阶段和使用阶段的承载安全,对超长隔震结构的温差变形进行模拟分析并与实际施工监测数据对比.结果表明:在某超长结构中设置两条后浇带且后浇带处钢筋全部断开,与不设置后浇带和设置两条后浇带但后浇带部分钢筋不断开相比,B1层和F1层温致收缩变形明显减小.同时监测数据表明,设置两条后浇带且后浇带处钢筋全部断开,在使用阶段最低温度下最大变形位于结构端部,总变形与模拟情况基本相符.Due to the installation of a flexible isolation layer at the bottom of the ultra-long seismic isolation structure,the deformation of the upper structure is fully released in the isolation layer under the influence of temperature and concrete shrinkage,resulting in significant deformation of the isolation support,which can seriously affect the safety of the structure.In order to ensure the load-bearing safety of the structure during the construction and service stages,this article simulates and analyzes the temperature difference deformation of the ultra-long seismic isolation structure and compares it with actual construction monitoring data.The results show that there are significant differences in the deformation of the isolation support under three working conditions:without post pouring belt,with two post pouring belts while some steel bars continuously disconnected,and with two post pouring belts and all steel bars disconnected at the post pouring belt.At the same time,the monitoring data shows that,when two post pouring strips are set and all steel bars at the post pouring strip are disconnected,the maximum deformation is located at the end of the structure at the lowest temperature during the service stage,and the total deformation is basically consistent with the simulation result.

关 键 词：超长隔震结构 温差变形 后浇带 有限元模拟 监测 

分 类 号：TU375.4[建筑科学—结构工程] TU352.1