大型液化天然气(LNG)储罐地震响应分析
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摘要
基于陆培炎提出的横向荷载作用下土、桩共同作用的集中力弹簧模型,将桩土共同作用简化为弹簧,考虑地震下的响应,在弹簧的基础上增加了阻尼器以模拟土的阻尼特性。通过集中质量法模拟地震作用下液化天然气对罐璧的动压力。利用ANSYS有限元分析软件,通过APDL语言建立桩-土-结构整体三维精细模型,对空罐、半罐及满罐三种工况进行了分析,并对基础刚接、基础隔震及考虑桩土作用及隔震垫三种情况进行了地震响应对比。
Based on concentred force spring modal of pile-soil interaction(PSI) under horizontal loads,raised by Lu Peiyan,simplify the PSI as spring with damper considering seismic response.Simulate the dynamic pressure of between LNG and internal tank shell by added mass method.ANSYS software is used to erect piles-soil-structure unitary 3D refined modal by APDL language.Condition of empty tank,half tank and full tank are analyzed,and the seismic response of rigid basis,rubber isolation basis and PSI with Rubber isolation basis are compared.
Based on concentred force spring modal of pile-soil interaction(PSI) under horizontal loads,raised by Lu Peiyan,simplify the PSI as spring with damper considering seismic response.Simulate the dynamic pressure of between LNG and internal tank shell by added mass method.ANSYS software is used to erect piles-soil-structure unitary 3D refined modal by APDL language.Condition of empty tank,half tank and full tank are analyzed,and the seismic response of rigid basis,rubber isolation basis and PSI with Rubber isolation basis are compared.
引文
[1]陆培炎.横向荷载下土、桩共同作用的简化法[J].广东水电科技,1991.
[2]G.W.Housner,Dynamic Pressures on Accelerated Fluid Contain-ers[J].Bull.Seism.Soc.Am,1957,47(1):15-35.
[3]胡盈辉.庄茁,由小川.大型储液罐在地震作用下的附加质量法研究[J].压力容器,2009,(8).
[4]李冬梅.某核电站安全壳的隔震地震反应分析[D].哈尔滨:哈尔滨工程大学,2007.
[5]李扬,李自力,张艳.铅芯橡胶支座隔震储罐地震响应特性分析[J].工程抗震与加固改造,2009,(6).
[2]G.W.Housner,Dynamic Pressures on Accelerated Fluid Contain-ers[J].Bull.Seism.Soc.Am,1957,47(1):15-35.
[3]胡盈辉.庄茁,由小川.大型储液罐在地震作用下的附加质量法研究[J].压力容器,2009,(8).
[4]李冬梅.某核电站安全壳的隔震地震反应分析[D].哈尔滨:哈尔滨工程大学,2007.
[5]李扬,李自力,张艳.铅芯橡胶支座隔震储罐地震响应特性分析[J].工程抗震与加固改造,2009,(6).
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