Ⅱ类冻土场地上储罐的地震反应分析
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
储罐属于薄壁结构 ,在地震过程中往往会造成严重灾害 .季节性冻土层从非冻结期过渡到冻结期 ,土层的动力参数会发生很大变化 .Ⅱ类场地由于覆盖层较薄 ,所以土层动力参数的变化将直接影响场地总的动力特性 .以Ⅱ类季节性冻土场地上的 8种浮顶罐为研究对象 ,计算了场地在非冻结期和冻结期 2种情况下储罐的地震反应 ,对比分析了 2种状态下的地震反应时程曲线 .结果表明 ,Ⅱ类冻土场地上的绝大多数储罐 ,冻结期的地震反应要比非冻结期的地震反应大 .在设计北方高寒地区上的储罐时 ,必须考虑季节性冻土层的影响
Tanks are thin wall structure, which is liable to be damaged in earthquakes. When the soil has been frozen, great changes will occur in the s eismic parameters of the soil layer. Because the cover layer of the second kind of ground is very thin, the changes of the seismic parameters will affect the ge neral seismic character of the ground directly . In this paper, we study eight k inds of liquid-storage steel tanks on the second kind of seasonally frozen grou nd, compute the seismic responses of the tanks on the sites with or without the frozen layer and compare the computing results. The results indicate that the se ismic response of tanks on the site with frozen layer is larger than that of tan ks on the site without frozen layer.
引文
[1] 徐学燕,仲丛利.冻土的动力特性研究及其参数确定[J].岩土工程学报,1998,21(3):33~39.
    [2] 孙建刚.立式储罐地震响应控制研究[D ].哈尔滨:中国地震局工程力学研究所,2002.
    [3] MedhatAH .WajdlAI .ParametricStudyofSeismicSoilTankInteraction.I :HorizontalExcitation[J].JournalofStructuralEngineering,1992,23(8):105~123

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心