發(fā)布時間：2018-05-27 06:44

  本文選題：高速列車 + 樁土效應��； 參考：《武漢理工大學》2015年碩士論文

【摘要】：交通擁擠阻礙著城市的發(fā)展,為了解決這一問題,我國加大了對高速鐵路和城市軌道交通建設,軌道交通也因為其方便、安全、快捷等優(yōu)點,成為人們出行方式的首選。但在方便人們出行的同時,運行列車對周圍環(huán)境也產(chǎn)生了強烈的振動影響,這種振動作對結(jié)構的舒適性和耐久性造成了影響,甚至會影響結(jié)構的安全性,嚴重干擾了人們的工作、生活和學習,逐漸引起人們的關注。為了解決此類問題,要對振源、傳播途徑和受振結(jié)構進行分析研究。本文基于對軌道交通系統(tǒng)產(chǎn)生振動的機理、振動的傳遞和周邊結(jié)構振動響應特性進行深入的研究,既可以解決鐵路軌道沿線受振動影響的問題,也可以為軌道交通系統(tǒng)的規(guī)劃設計和鑒定評估提供參考和依據(jù)。通過對環(huán)境振動的理論分析,基于子結(jié)構法的思想,把列車-軌道-軌枕-大地-基礎-結(jié)構體系分為列車-軌道-軌枕-大地體系和軌道-軌枕-大地-基礎-結(jié)構體系。在考慮樁土相互作用非線性接觸的關系下,通過有限元分析軟件ANSYS建立起軌道-軌枕-大地-基礎-結(jié)構體系的有限元分析模型,利用這個有限元模型模擬了在不同工況下結(jié)構體系的振動響應特性,最后根據(jù)我國的《城市區(qū)域環(huán)境振動標準》(GB10070-88)對受列車荷載影響下的高層建筑進行舒適度評價。本文的主要研究內(nèi)容有:(1)通過對列車與軌道的耦合動力分析模型和軌道不平順的激勵的研究,計算出在列車輪壓的作用下軌道節(jié)點的反力。為了分析振動波的傳遞和衰減規(guī)律,建立起軌道-軌枕-大地的有限元傳遞分析模型。(2)通過對地基土-基礎-高層建筑相互作用分析模型的研究,根據(jù)彈塑性理論的基本分析方法,完成對樁與土之間非線性接觸的模擬,從而建立起軌道-軌枕-土體-基礎-結(jié)構體系的有限元分析模型。(3)通過對不同距離、不同車速和不同樓層高度時結(jié)構體系振動響應特性的研究,得到了地基土和高層建筑的振動響應特性規(guī)律。并且對比分析了考慮樁土效應的情況下,高層建筑的很多響應特性,完成結(jié)構體系舒適度的評價。本文研究了在考慮樁土效應下高速列車運行對高層建筑的振動影響,通過不同工況下樁與土的接觸關系,真實模擬出了高層建筑的振動響應特性,為今后同類建筑結(jié)構的規(guī)劃設計和鑒定評估提供依據(jù),具有明顯的現(xiàn)實意義。
[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.
【學位授予單位】：武漢理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U211.3;TU973.2

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