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水平动载下桶型基础周围土体软化的离心机模拟
鲁晓兵; 张建红; 王淑云; 孙国亮; 时忠民
Source Publication中国海洋平台
2004-12-30
Volume19Issue:6Pages:10-14
Abstract为了探讨海洋平台桶形基础在水平动载荷下的响应特性,为实际工程设计提供依据,本文以等效动冰载作用为例,对饱和砂土地基上桶形基础的动力响应进行了离心机实验研究。通过实验发现,沿深度方向,孔隙水压力从土体表层到土体下部逐渐减小,当土体表层已液化,下部土体(桶底面高程位置)的孔隙水压力增加还很小,桶的总承载力降低约17%。;沿水平方向,孔隙水压力发展从桶壁近区到远处逐渐衰减,在离桶壁3%桶直径处,液化指数(孔隙水压力除以初始有效应力)已为1.0,在离桶壁23%桶直径处,液化指数为0.4。随载荷幅值增加,土体软化、液化发展加快;在实验范围内,随压重增加,上部土体影响增加;在桶直径一定条件下,土体响应随桶高的减小而增加。
Keyword等效动冰载 饱和土 液化 桶形基础
Language中文
Funding Organization中科院、海洋石油总公司联合重大项目"新型海洋平台关键技术研究"
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/41552
Collection力学所知识产出(1956-2008)
Corresponding Author鲁晓兵
Recommended Citation
GB/T 7714
鲁晓兵,张建红,王淑云,等. 水平动载下桶型基础周围土体软化的离心机模拟[J]. 中国海洋平台,2004,19(6):10-14
APA 鲁晓兵,张建红,王淑云,孙国亮,&时忠民.(2004).水平动载下桶型基础周围土体软化的离心机模拟.中国海洋平台,19(6),10-14.
MLA 鲁晓兵,et al."水平动载下桶型基础周围土体软化的离心机模拟".中国海洋平台 19.6(2004):10-14.
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