计算力学学报2016，Vol.33Issue(5)：689-696,8.DOI:10.7511/jslx201605006
基于弹塑性模型的群桩-土-结构动力非线性数值分析
Nonlinear dynamic time history analysis of pile-groups-soil-structure based on elsto-plastic model
摘要
Abstract
A pile-soil elato-platic model is provided.Combined with dynamic Winkler model,the spring-dashpot dynamic impedance related to pile (raft)-soil attributes and the frequency of SSI system is derived.A simplified three dimensional interaction finite element analysis model of soil-frame structure is established and nonlinear dynamic time history analysis is performed for this model under different seis-mic excitation and different conditions of pile-soil.The result shows that under certain ground motion and soil-foundation conditions,nonlinear effect of the upper structure can be greater than fixed base assumption and pile-group-soil soft support model also influences the weak layer position on upper struc-ture.By using the simplified method,the designers can carry out dynamic time history analysis and seis-mic evaluation for the superstructure quickly,accurately and efficiently.关键词
群桩-土弹塑性模型/动力阻抗/非线性时程/动力分析/简化非线性弹-阻单元Key words
pile-groups-soil elato-plastic model/dynamic impedance/nonlinear time history/dynamic analysis/simplified nonlinear spring-dashpot element分类
建筑与水利引用本文复制引用
熊辉,杨佳..基于弹塑性模型的群桩-土-结构动力非线性数值分析[J].计算力学学报,2016,33(5):689-696,8.基金项目
教育部新世纪优秀人才支持计划(NCET-13-190) （NCET-13-190）
湖南省科技计划(2013FJ4214)资助项目 （2013FJ4214）
