砂土地震液化对筒型基础承载力的影响  

Influence of Sand Seismic Liquefaction on Bearing Capacity of Bucket Foundation

作　　者：姚涛[1] 余建星[2] 李志刚[1] 乔晓国[2] 马骏[2] 

机构地区：[1]海洋石油工程股份有限公司,天津300451 [2]天津大学,天津300072

出　　处：《海岸工程》2012年第3期1-8,共8页Coastal Engineering

基　　金：中国海洋石油总公司工程项目--水下分离器及相关技术研究(C/KJFHG001-2009)

摘　　要：使用了ANSYS软件对筒型基础进行地震分析,计算了砂土液化情况以及由此导致的承载力的损失,对比了在筒-土界面采用节点耦合和设置接触单元两种形式对该结果的影响,结果显示节点耦合形式既可以保证计算精度,也能提高计算效率。同时,分析了不同长细比筒型基础的砂土液化深度和承载力损失,结果显示较大的长细比有利于减少承载力损失。The seismic analysis of bucket foundation is carried out by using ANSYS soft-ware, the sand liquefaction and the reduction of bearing capacity are calculated, and both setting-up a contact unit and using node coupling on the bucket soil interface are used in finite element model to compare the influences on the obtained results. It has been shown that the node coupling method can ensure the precision of calculation and improve the calculation efficiency. Furthermore, several bucket foundations with different slenderness are analyzed to obtain the depth of sand liquefaction and the reduction of bearing capacity, indicating that the more slender bucket foundations will benefit the bearing capacity.

关 键 词：筒型基础 液化 地震 有限元 

分 类 号：TE58[石油与天然气工程—油气田开发工程]