分层土中单桩和群桩水平动力阻抗的统计特性  

Statistics of horizontal dynamic impedances of single and group piles in layered soil

作　　者：黄斌[1] 高洪波[2] 

机构地区：[1]武汉理工大学土木工程与建筑学院,湖北武汉430070 [2]中交第二公路勘察设计研究院,湖北武汉430052

出　　处：《岩土工程学报》2006年第5期582-586,共5页Chinese Journal of Geotechnical Engineering

基　　金：武汉理工大学科学研究基金项目

摘　　要：基于Winkler地基梁模型,提出了计算分层土中单桩动力阻抗的有限元方法。假设土的弹性模量为随机场,利用Neumann随机有限元法得到了单桩水平动力阻抗的统计特性。在分析了动力相互作用因子的统计特性后,推导了群桩的水平动力阻抗的统计表达式。最后通过算例分析,得到了一些有意义的结论。Based on the beam model on Winkler foundation, the finite element method for calculating the horizontal dynamic impedances of single pile in layered soil was set up. The elastic modulus of the layered soil was assumed as random field. The statistics of horizontal dynamic impedances of single pile in layered soil was derived utilizing the Neumann Stochastic finite element method. Furthermore, the statistics of dynamic interaction factors were studied and the statistic expressions of dynamic impedances of group piles were presented. Several significant conclusions were obtained through analyzing the examples.

关 键 词：动力阻抗 桩-土动力相互作用 随机场 随机有限元 

分 类 号：TU311[建筑科学—结构工程]