考虑竖向地震的液化天然气提离储液罐动力响应分析  

ANALYSIS OF THE DYNAMIC RESPONSES OF LNG STORAGE TANK WITH UPLIFT CONSIDERING VERTICAL EARTHQUAKE

作　　者：周俊文 赵鸣[1] ZHOU Junwen;ZHAO Ming(College of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《工业建筑》2020年第4期39-43,38,共6页Industrial Construction

基　　金：国家自然科学基金资助项目(51478363)。

摘　　要：采用有限元方法建立了液态天然气储液罐模型,考虑流固耦合作用,通过接触方法实现了支承柱的负向位移约束并允许正向提离,完成水平单向地震作用下的动力分析,结合竖向地震进行对比,得到了锚固罐和带耗能柱脚阻尼器提离罐的地震响应,主要包括结构的位移、罐壁的等效应力、支承柱的内应力、基底剪力、倾覆弯矩和液体晃动以及支柱的提离。结果表明:柱底提离能有效降低结构应力,竖向地震对提离储液罐的动力响应有放大作用。The model of LNG(liquefied natural gas) storage tank was established by finite element method with the consideration of liquid-structure interaction.The column had the negative vertical displacement constrained by contact algorithm with upward uplift allowed.Then the dynamic analysis of the tank under horizontal unidirectional earthquake was presented.The results were compared with the one under horizontal and vertical earthquake by anchored tank and isolated tank with energy dissipated damper.The discussion was related to the structural displacement,the equivalent stress of tank walls,the internal stress of columns,the base shear force,the overturning moment,the liquid sloshing and the uplift movement.The result showed that uplifting effect of columns resulted in a great reduction of structural stress and vertical earthquake,vertical earthquake had a great impact on seismic responses of the uplift tank on rigid ground.

关 键 词：竖向地震 地震响应 单向剪切型阻尼器 储液罐 提离 

分 类 号：TE972[石油与天然气工程—石油机械设备]