群桩(土)-承台-结构的动力相互作用分析  

DYNAMIC INTERACTIVE ANALYSIS OF PILE GROUP-SOIL-STRUCTURE

作　　者：熊辉[1] 邹银生[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《工程力学》2004年第4期75-80,共6页Engineering Mechanics

摘　　要：基于共同作用理论,在导出了时域中上、下部相互作用动力平衡方程的基础上,利用桩-桩动力相互作用因子法获取了群桩的动力阻抗,对水平地震作用下群桩-土-上部结构的反应特性进行了较全面的分析。着重讨论并估计了群桩抽桩布置于体系动力反应的影响,通过数值计算分析,取得了一些有价值的认识,并认为受水平地震力作用桩承结构也可借鉴考虑竖向上、下部共同作用沉降优化的理念和思想来进行抽桩设计。The interactive dynamic equilibrium equations of the pile group-soil-structure system in time-domain are derived. The characteristic response of the pile-soil-structure under the vertical seismic s-wave is analyzed comprehensively by means of dynamic interactive factors of pile-to- pile which can be used to obtain impedance of pile-groups. The effect with various taking out-collocation of pile-groups on dynamic response of system is emphasized and evaluated by numerical computation, and some helpful conclusions are also obtained. In addition, a design idea on pile-supported structures subjected to horizontal seismic load is presented by referring to the concept of settlement optimization which has been applied to vertical static analysis of soil-pile-structure systems.

关 键 词：上下部共同作用 群桩阻抗 抽桩布置 桩基动力设计 结构反应 

分 类 号：TU473[建筑科学—结构工程]