水平地震作用下桩—土—框架剪力墙结构相互作用分析

发布时间：2018-09-04 13:39

【摘要】：随着建筑业蓬勃发展与进步，各类建筑结构形式如雨后春笋，出现在人们视野中，而框架剪力墙结构以其相对优越的性能备受关注；与此同时地震频发给人类带来诸多灾难，使得地震荷载作用下框架剪力墙结构相互作用分析成为诸多学者研究的热点。本文以ABAQUS有限元软件为平台，在Winkler模型系基础上，建立了桩-土柱-结构计算模型，探讨了水平地震荷载作用下，桩-土相互作用对框架剪力墙结构地震响应结果的影响。主要从以下几个方面展开研究：以p-y曲线法为指导思想，运用Novak的k-p关系式推导得到用于模拟桩土水平荷载作用下弹簧的p-y关系曲线，通过Rajashree的水平位移衰减率来修正p-y关系曲线，以适合地震荷载作用下土极限承载力随滞回循环数增加而减小的特点并在ABAQUS里将修正的p-y关系表达式赋予非线性弹簧属性。同时用Massing法则构建滞回环曲线，在此基础上通过粘滞阻尼系数和能量耗散系数判别相应土层能量消耗的情况。建立包括用于模拟土层之间相互剪切作用的土柱模型，用于模拟上部框架剪力墙结构的三维框剪计算模型，用于补充计算的高宽比较小、剪力墙布置均匀的三维复杂框剪计算模型，用于模拟土层能量耗散的Winkler黏弹元件。用PROSHAKE软件推算桩底、地表地震动的基础上借助ABAQUS强大非线性处理性能，分别对考虑桩-土相互作用和不考虑桩-土相互作用的计算模型，进行弹性、弹塑性动力时程分析，从楼层位移，层间位移角，，楼层剪力以及混凝土受压损伤等方面对比分析考虑相互作用对结构地震响应结果的影响。
[Abstract]:With the rapid development and progress of the construction industry, all kinds of building structure forms are springing up in the view of people, and the frame-shear wall structure has attracted much attention because of its relatively superior performance. At the same time, frequent earthquakes have brought many disasters to human beings. The analysis of frame shear wall structure interaction under seismic loads has become a hot topic for many scholars. Based on ABAQUS finite element software and Winkler model, a pile-soil-pile-structure model is established in this paper. The influence of pile-soil interaction on the seismic response of frame shear wall structure under horizontal earthquake load is discussed. The research is mainly carried out from the following aspects: based on the p-y curve method, the p-y relation curve is derived by using Novak's k-p relation to simulate the spring under the horizontal load of pile and soil. The p-y relation curve is modified by the horizontal displacement attenuation rate of Rajashree, which is suitable for decreasing the ultimate bearing capacity of soil with the increase of hysteresis cycle number under earthquake load. The modified p-y relation expression is assigned to nonlinear spring in ABAQUS. At the same time, the hysteretic loop curve is constructed by Massing's rule, and the energy consumption of soil layer is judged by viscous damping coefficient and energy dissipation coefficient. A soil column model, which is used to simulate the shear interaction between soil layers, is established, and the three-dimensional frame-shear calculation model is used to simulate the upper frame shear wall structure. The height and width of the supplementary calculation are small. A three dimensional complex frame shear model with uniform layout is used to simulate the energy dissipation of soil layer by Winkler viscoelastic element. Based on the calculation of pile bottom by PROSHAKE software, the elastic and elastoplastic dynamic time history analysis is carried out on the basis of the strong nonlinear processing performance of ABAQUS, and the calculation models considering pile-soil interaction and not considering pile-soil interaction are analyzed respectively. The influence of the interaction on the seismic response of the structure is analyzed comparatively from the aspects of floor displacement, interstory displacement angle, floor shear force and concrete compression damage.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398.9;TU311.3

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