地震作用下污水厂中地下含水箱体的上部框架结构动力响应  

Seismic Response Analysis on Upper Frame Structure of Underground Water Tank in Sewage Treatment Plant

作　　者：许怡 桂昱鹏 林峰[2] Xu Yi;Gui Yupeng;Lin Feng(Shanghai Municipal Engineering Design Institute(Group)Co.,Ltd.,200092,China;School of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,200092 [2]同济大学土木工程学院,上海200092

出　　处：《特种结构》2025年第1期92-97,共6页Special Structures

基　　金：国家重点研发计划(2022YFC3803004)。

摘　　要：在我国城市人口密集地区,全地下式污水厂的地上部分存在商业开发需求。上部结构的抗震设计目前一般不考虑地下箱体内水体晃动的影响,结构安全存在隐患。本研究考虑地震作用下地下箱体内水体晃动,分析上部框架结构动力响应。使用ABAQUS软件分别建立“框架”、“土体+框架”、“水+框架”、“水+土体+框架”四个模型,采用时程分析方法计算得到了小震作用下四个模型中的上部结构内力峰值。比较发现,小震作用下水池水体晃动对上部结构内力响应最大有5%~15%左右的增大效应。最后,使用附加质量法进行简化计算并与流固耦合方法比较。结果表明,附加质量法可行且偏于安全。In densely populated urban areas,commercial development is demanded for the above ground buildings of underground sewage treatment plants.Currently,seismic design of the superstructures generally does not consider the impact of water shaking inside the underground tanks,which causes potential safety risks to the superstructures.In this study,dynamic responses of the superstructure were investigated considering the shaking of water in the underground tank of a sewage treatment plant under earthquakes.Four models were established,i.e.,frame,"soil+frame","water+frame"and"water+soil+frame".The peak values of the internal forces in the superstructure in the four models under small earthquakes was calculated by time history method.It was found that the water shaking in the pool increased the internal force responses of the superstructure by about 5%to 15%:Finally,the additional mass method was used as a simplified approach and compared with the fluid-structure coupling method,and the results showed that the additional mass method was feasible and on the safety margin.

关 键 词：全地下式污水厂 框架结构 地震响应 液固耦合 

分 类 号：TU352[建筑科学—结构工程]