季节性冻土对桩基础桥墩地震反应的影响
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摘要
季节性冻土层改变了地基土的动力特性和卓越周期,因而对桥墩的地震反应产生影响.利用ANSYS软件,对Ⅱ类场地上的桩基础桥墩在场地非冻结期和冻结期两种情况下的地震反应进行了计算,并对结果进行了分析和比较.结果表明Ⅱ类场地上的桩基础桥墩,冻结期的地震反应比非冻结期的地震反应明显减小.
In winter,seasonally frozen ground changes the dynamic properties of foundation soil and the predominant periods of soil sites,and then the seismic responses of pier on the seasonally frozen ground will be influenced.Using ANSYS software,we have studied the responses of the pier with pile foundation on the Ⅱ sites with or without the frozen layer and compared both of the computing results.The results indicate that the responses of pier on the site with the frozen layer are much less than it without the frozen layer.
引文
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