【作者】 何小安；

【导师】 陈清军；

【作者基本信息】 同济大学 ， 防灾减灾工程及防护工程， 2007， 硕士

【摘要】 近年来随着基于建筑物位移和基于建筑物功能的抗震设计思想的发展，能力谱法引起了各国学术界的广泛关注，进行了一系列的研究，但这些研究成果主要限于刚性地基条件下的结构问题，用能力谱方法进行土—结构相互作用的研究成果却鲜有报道。本文尝试采用能力谱方法进行土—桩—结构相互作用分析。 本文首先基于能力谱方法对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。文中应用子结构原理，将群桩基础用一组弹簧来模拟，并用近似解析方法确定群桩刚度，建立了土—桩—高层框架结构相互作用体系Pushover分析模型；利用这一模型，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和位移谱值、以及基底剪力和顶点位移等结果，探讨了不同地震烈度下两种不同分析模型间的结果差异。在此基础上，本文进一步考虑桩侧土体抗力的非线性，采用ATC-40报告中建议的能力谱法，通过编制程序与ANSYS的结合，对桩承框架结构、桩承框架—剪力墙结构和桩承框架—简体结构进行了三维能力谱分析，探讨了考虑土—桩—结构相互作用时不同形式高层结构的反应差异，得到了一些有应用价值的结果。更多还原

【Abstract】 As the development of Displacement-Based Seismic Design(DBSD) and Performance-Based Seismic Design(PBSD), Capacity spectrum method causes widespread attention and are studied widely. But it is uncommonly reported that Pushover is used in analysis of soil-structure interaction. This paper attempts to use Pushover analysis in analysis of soil-structure interaction.In this paper, capacity spectrum method is adopted to perform nonlinear static seismic response analysis for high-rise frame structures with pile group foundation resting on natural foundation soils. The substructure technique is adopted to simulate pile group with a group of springs, determine pile group stiffness with Davies method and establish the pushover model of soil-pile-structure interaction system. The Spectral Acceleration and the Spectral Displacement at performance points, base reaction and displacement of soil-pile-structure interaction model and rigid ground model under uniform load pattern and mode load pattern are analyzed. The differences of the results of two models under different earthquake intensities are discussed and some valuable results are obtained. Then, the P-y curve is used to simulate nonlinearity of the soil around the pile with a group of nonlinear springs. Capacity spectrum method advised by ATC-40 is adopted to perform three dimensional Pushover analysis of three different high-rise structures using ANSYS software. The results of three structures are discussed and some valuable conclusions are obtained.更多还原