大型全容式LNG储罐基础隔震地震响应分析

英文篇名：Seismic response of large-scale full capacity LNG storage tanks with base isolation
中文刊名：哈尔滨工业大学学报
英文刊名：Journal of Harbin Institute of Technology
作者：孙建刚 ; 崔利富 ; 郑建华
英文作者：SUN Jian-gang1 ; CUI Li-fu2 ; ZHENG Jian-hua3(1.College of Civil and Architecture Engineering ; Dalian Nationalities University ; 116600 Dalian ; Liaoning ; China ; 2.Institute of Road and Bridge Engineering ; Dalian Maritime University ; 116026 Dalian ; Liaoning ; China ; 3.China HuanQiu Contracting & Engineering Cooperation ; 100028 Beijing ; China)
中文关键词：LNG储罐 ; 基础隔震 ; 力学模型 ; 地震动响应
英文关键词：LNG storage tanks ; base isolation ; mechanical model ; seismic response
出版日期：2012-08-30
机构：大连民族学院土木建筑工程学院;大连海事大学道路与桥梁工程研究所;中国寰球工程公司;
年：2012
期：08
出版单位：哈尔滨工业大学学报

摘要

为了给大型LNG储罐基础隔震设计提供理论和技术支撑,将混凝土外罐依据的剪切悬臂梁理论,钢制内罐依据的速度势理论,引入隔震层刚度和阻尼,建立了LNG储罐基础隔震体系的等效力学模型;应用Hamilton原理,推导了LNG储罐基础隔震体系运动方程,给出了地震响应的理论表达.针对160 000 m3大型LNG储罐进行数值分析,结果表明:除晃动波高外,基底剪力和倾覆弯矩减震效果明显;进行LNG储罐基础设计时,要考虑外罐的影响,而钢制内罐设计时,可以忽略外罐的影响;LNG储罐隔震设计时,要考虑隔震对晃动带来的影响,进行优化设计.
To provide a theoretical and technical basis for base isolation of LNG storage tanks,based on the shear beam theory for the outer-concrete-tank and the velocity potential theory for the inner-steel tank,and by introducing isolation stiffness and damping,the equivalent mechanical model of LNG storage tank base isolation system was established,the movement equations of LNG storage tank base isolation system were derived according to Hamilton's principle and the theoretical expression of seismic response were given.To 160 000 m3 large LNG storage tank,the numerical analysis results showed that,in addition to wave height,the base shear and overturning moment damping effect was obvious,the foundation design of LNG storage tank was necessary to consider the impact of outer-tank,however,when designing the inner-steel tanks,the impact of outer-tank could be ignored.It was necessary to optimize the design considering the influence of isolation on the sloshing of base isolation of LNG storage tanks.

引文

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