基于能力谱法的土-桩-结构相互作用分析  

Analysis of Soil-Pile-Structure Interaction System Based on Capacity Spectrum Method

作　　者：陈清军[1] 何小安[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《力学季刊》2007年第1期103-110,共8页Chinese Quarterly of Mechanics

基　　金：国家自然科学基金资助(50538050)

摘　　要：本文基于能力谱方法对天然地基上带群桩基础的高层框架结构进行了平面静力弹塑性分析。文中首先应用子结构原理,将群桩基础用一组弹簧来模拟,并用Davies方法确定群桩刚度,建立了土-桩-高层框架结构相互作用体系Pushover分析模型;在此基础上,分析了均匀分布方式和依各层质量与第一弹性振型乘积比例分布等两种侧向加载模式下土-桩-结构相互作用模型和刚性地基模型的结构各性能点的加速度谱值Sa和位移谱值Sd、以及基底剪力和顶点位移等,探讨了不同地震烈度(7度、8度和9度)下两种不同分析模型间的结果差异,得到了一些有应用价值的结果。Capacity spectrum method was adopted to perform nonlinear static seismic response analysis for highrise frame structures with grouped pile foundation resting on natural foundation soils. The substructure technique was adopted to simulate pile group with a group of springs, the grouped pile stiffness was determined with Davies method and Pushover model of soil-pile-structure interaction system was established. The Spectral Acceleration and the Spectral Displacement at performance points, the base reaction and displacement of soil-pile-structure interaction model and rigid foundation model under uniform load pattern and mode load pattern were analyzed. The differences of the results of two models under different earthquake intensities （7 degree, 8 degree, 9 degree） were discussed and some valuable results were obtained.

关 键 词：土-桩-结构相互作用 能力谱法 群桩刚度 框架结构 不同地震列度 

分 类 号：TU311[建筑科学—结构工程]