考虑桩土效应下高速列车运行对高层建筑的振动影响研究

发布时间：2018-05-27 06:44

本文选题：高速列车 + 桩土效应　；参考：《武汉理工大学》2015年硕士论文

【摘要】：交通拥挤阻碍着城市的发展,为了解决这一问题,我国加大了对高速铁路和城市轨道交通建设,轨道交通也因为其方便、安全、快捷等优点,成为人们出行方式的首选。但在方便人们出行的同时,运行列车对周围环境也产生了强烈的振动影响,这种振动作对结构的舒适性和耐久性造成了影响,甚至会影响结构的安全性,严重干扰了人们的工作、生活和学习,逐渐引起人们的关注。为了解决此类问题,要对振源、传播途径和受振结构进行分析研究。本文基于对轨道交通系统产生振动的机理、振动的传递和周边结构振动响应特性进行深入的研究,既可以解决铁路轨道沿线受振动影响的问题,也可以为轨道交通系统的规划设计和鉴定评估提供参考和依据。通过对环境振动的理论分析,基于子结构法的思想,把列车-轨道-轨枕-大地-基础-结构体系分为列车-轨道-轨枕-大地体系和轨道-轨枕-大地-基础-结构体系。在考虑桩土相互作用非线性接触的关系下,通过有限元分析软件ANSYS建立起轨道-轨枕-大地-基础-结构体系的有限元分析模型,利用这个有限元模型模拟了在不同工况下结构体系的振动响应特性,最后根据我国的《城市区域环境振动标准》(GB10070-88)对受列车荷载影响下的高层建筑进行舒适度评价。本文的主要研究内容有:(1)通过对列车与轨道的耦合动力分析模型和轨道不平顺的激励的研究,计算出在列车轮压的作用下轨道节点的反力。为了分析振动波的传递和衰减规律,建立起轨道-轨枕-大地的有限元传递分析模型。(2)通过对地基土-基础-高层建筑相互作用分析模型的研究,根据弹塑性理论的基本分析方法,完成对桩与土之间非线性接触的模拟,从而建立起轨道-轨枕-土体-基础-结构体系的有限元分析模型。(3)通过对不同距离、不同车速和不同楼层高度时结构体系振动响应特性的研究,得到了地基土和高层建筑的振动响应特性规律。并且对比分析了考虑桩土效应的情况下,高层建筑的很多响应特性,完成结构体系舒适度的评价。本文研究了在考虑桩土效应下高速列车运行对高层建筑的振动影响,通过不同工况下桩与土的接触关系,真实模拟出了高层建筑的振动响应特性,为今后同类建筑结构的规划设计和鉴定评估提供依据,具有明显的现实意义。
[Abstract]:Traffic congestion hinders the development of the city. In order to solve this problem, our country has increased the construction of high-speed railway and urban rail transit. Rail transit has become the first choice for people to travel because of its advantages such as convenience, safety, speed and so on. However, while it is convenient for people to travel, the running train also has a strong vibration effect on the surrounding environment, which affects the comfort and durability of the structure, and even affects the safety of the structure. It seriously interferes with people's work, life and study, and gradually attracts people's attention. In order to solve this kind of problem, the vibration source, propagation way and vibrational structure should be analyzed and studied. Based on the research of the mechanism of vibration, the transmission of vibration and the vibration response characteristics of surrounding structure, this paper can solve the problem that the railway track is affected by vibration. It can also provide reference and basis for the planning, design and appraisal of rail transit system. Based on the idea of substructure method, the train track sleeper earth foundation structure system is divided into train track sleepers earth system and track sleeper earth foundation structure system based on the theoretical analysis of environmental vibration. Considering the nonlinear contact between pile and soil, the finite element analysis model of track, sleeper, earth foundation and structure system is established by the finite element analysis software ANSYS. This finite element model is used to simulate the vibration response characteristics of the structural system under different working conditions. Finally, the comfort degree of high-rise buildings affected by train loads is evaluated according to our country's National Standard for Environmental Vibration in Urban areas (GB10070-88). The main research contents of this paper are as follows: (1) by studying the coupled dynamic analysis model of train and track and the excitation of track irregularity, the reaction force of rail joint under the action of train wheel pressure is calculated. In order to analyze the law of vibration wave transmission and attenuation, the finite element transfer analysis model of track, sleeper and earth is established. According to the basic analysis method of elastic-plastic theory, the nonlinear contact between pile and soil is simulated, and the finite element analysis model of track-sleeper soil-foundation structure system is established. The vibration response characteristics of the structure system with different speed and height are studied, and the vibration response characteristics of the foundation soil and high-rise building are obtained. And the response characteristics of high-rise building are compared and analyzed considering the pile-soil effect to evaluate the comfort degree of the structure system. In this paper, the effect of high-speed train operation on the vibration of high-rise building under the consideration of pile-soil effect is studied. Through the contact relationship between pile and soil under different working conditions, the vibration response characteristics of high-rise building are simulated. It is of great practical significance to provide the basis for the planning, design and appraisal of similar building structures in the future.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U211.3;TU973.2

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