边界对季节性冻土区挖井基础桥墩地震反应的影响  

Influence of Boundary on the Seismic Damages of Pier with Shallow Foundation on the Seasonally Frozen Ground

作　　者：王玉洁[1] 陈兴冲[1] 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《兰州交通大学学报》2007年第3期10-13,共4页Journal of Lanzhou Jiaotong University

摘　　要：利用ANSYS软件,对Ⅱ类场地上的挖井基础桥墩在两种边界条件下的冻土和融土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类场地上的挖井基础桥墩,采用粘弹性边界时的桥墩地震反应比固定边界时的地震反应小;冻土时的地震反应比融土时的地震反应明显减小.The seismic responses of the pier with shallow foundation on the Ⅱ sites are studied using ANSYS software,and the computing results with or without the frozen layer under two boundaries are analyzed and compared. The results indicate that the seismic responses of pier under the viscous-spring boundary are less than that under the fixed boundary, and the seismic responses of pier on the site with the frozen layer are much less than that without the frozen layer.

关 键 词：固定边界 粘弹性边界 季节性冻土层 桥墩 地震反应 

分 类 号：TU311.3[建筑科学—结构工程]