砂土地震液化对筒型基础承载力的影响
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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 software,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.
The seismic analysis of bucket foundation is carried out by using ANSYS software,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.
引文
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[3]顾晓鲁,钱鸿缙,惠珊,等.地基与基础[M].北京:中国建筑工业出版社,1993:630-633.
[4]莫维尼,王崧,刘丽娟,等.有限元分析:ANSYS理论与应用[M].北京:电子工业出版社,2008.
[2]赵旭荣.砂土液化机理及其判别方法研究[J].水利科技与经济,2008,14(9):694-695.
[3]顾晓鲁,钱鸿缙,惠珊,等.地基与基础[M].北京:中国建筑工业出版社,1993:630-633.
[4]莫维尼,王崧,刘丽娟,等.有限元分析:ANSYS理论与应用[M].北京:电子工业出版社,2008.
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