地下室顶板开洞对高层建筑嵌固效应的影响分析  

Analysis of Influence of Opening in Basement Roof on Fixed-end Effect of Tall Building

作　　者：张能伟 ZHANG Nengwei(Tongji Architectural Design(Group)Co.,LTD.,Shanghai 200092,China)

机构地区：[1]同济大学建筑设计研究院(集团)有限公司,上海200092

出　　处：《结构工程师》2024年第1期46-52,共7页Structural Engineers

基　　金：同济大学建筑设计研究院(集团)有限公司自主课题(2020J-JG15、2022J-JG04)。

摘　　要：建筑工程的嵌固端选择直接影响结构的安全、经济等评价指标,规范要求地下室顶板作为上部结构的嵌固端时应避免开设大洞口。实际工程中,由于建筑功能的要求,地下室顶板开洞不可避免。以上海某高层建筑为例,从地下室顶板应力和位移两方面分析开洞对嵌固效应的影响。同时对比分析地下室顶板开洞和不开洞两种情况下的结构振动特性和顶点位移,并对两种模型进行静力弹塑性分析,对比塑性铰的位置、数量和损伤程度,查看是否满足强度嵌固的要求。结果表明:本工程中,地下室顶板开洞后仍能满足其对上部结构的嵌固要求。The selection of the fixed-end of building structure directly affects the safety,economy and other evaluation indicators of the structure.The codes requires that when the basement roof is used as the fixed-end of the tower,large hole should be avoided.In practical projects,due to the requirements of functions,it is inevitable to open holes on the basement roof.Taking a tall building in Shanghai as an example,the influence of opening on the embedded effect is analyzed from the distribution of stress and displacement of the basement roof.At the same time,the structural vibration characteristics and vertex displacement of the basement roof with and without hole are compared and analyzed,and the static elastic-plastic analysis is carried out for the two models.The position,number and damage degree of plastic hinges are compared to see whether they meet the requirements of strength fixed-end.The results show that,in this project,the hole of basement roof can still meet the requirements of the tower.

关 键 词：高层结构 嵌固端 地下室顶板开洞 静力弹塑性分析 塑性铰 

分 类 号：TU93[建筑科学—结构工程] TU973.2