本文選題：高速列車 + 樁土效應(yīng)��； 參考：《武漢理工大學(xué)》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(wèn)題,我國(guó)加大了對(duì)高速鐵路和城市軌道交通建設(shè),軌道交通也因?yàn)槠浞奖�、安全、快捷等�?yōu)點(diǎn),成為人們出行方式的首選。但在方便人們出行的同時(shí),運(yùn)行列車對(duì)周圍環(huán)境也產(chǎn)生了強(qiáng)烈的振動(dòng)影響,這種振動(dòng)作對(duì)結(jié)構(gòu)的舒適性和耐久性造成了影響,甚至?xí)绊懡Y(jié)構(gòu)的安全性,嚴(yán)重干擾了人們的工作、生活和學(xué)習(xí),逐漸引起人們的關(guān)注。為了解決此類問(wèn)題,要對(duì)振源、傳播途徑和受振結(jié)構(gòu)進(jìn)行分析研究。本文基于對(duì)軌道交通系統(tǒng)產(chǎn)生振動(dòng)的機(jī)理、振動(dòng)的傳遞和周邊結(jié)構(gòu)振動(dòng)響應(yīng)特性進(jìn)行深入的研究,既可以解決鐵路軌道沿線受振動(dòng)影響的問(wèn)題,也可以為軌道交通系統(tǒng)的規(guī)劃設(shè)計(jì)和鑒定評(píng)估提供參考和依據(jù)。通過(guò)對(duì)環(huán)境振動(dòng)的理論分析,基于子結(jié)構(gòu)法的思想,把列車-軌道-軌枕-大地-基礎(chǔ)-結(jié)構(gòu)體系分為列車-軌道-軌枕-大地體系和軌道-軌枕-大地-基礎(chǔ)-結(jié)構(gòu)體系。在考慮樁土相互作用非線性接觸的關(guān)系下,通過(guò)有限元分析軟件ANSYS建立起軌道-軌枕-大地-基礎(chǔ)-結(jié)構(gòu)體系的有限元分析模型,利用這個(gè)有限元模型模擬了在不同工況下結(jié)構(gòu)體系的振動(dòng)響應(yīng)特性,最后根據(jù)我國(guó)的《城市區(qū)域環(huán)境振動(dòng)標(biāo)準(zhǔn)》(GB10070-88)對(duì)受列車荷載影響下的高層建筑進(jìn)行舒適度評(píng)價(jià)。本文的主要研究?jī)?nèi)容有:(1)通過(guò)對(duì)列車與軌道的耦合動(dòng)力分析模型和軌道不平順的激勵(lì)的研究,計(jì)算出在列車輪壓的作用下軌道節(jié)點(diǎn)的反力。為了分析振動(dòng)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(guò)對(duì)地基土-基礎(chǔ)-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(duì)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(chǔ)-結(jié)構(gòu)體系的有限元分析模型。(3)通過(guò)對(duì)不同距離、不同車速和不同樓層高度時(shí)結(jié)構(gòu)體系振動(dòng)響應(yīng)特性的研究,得到了地基土和高層建筑的振動(dòng)響應(yīng)特性規(guī)律。并且對(duì)比分析了考慮樁土效應(yīng)的情況下,高層建筑的很多響應(yīng)特性,完成結(jié)構(gòu)體系舒適度的評(píng)價(jià)。本文研究了在考慮樁土效應(yīng)下高速列車運(yùn)行對(duì)高層建筑的振動(dòng)影響,通過(guò)不同工況下樁與土的接觸關(guān)系,真實(shí)模擬出了高層建筑的振動(dòng)響應(yīng)特性,為今后同類建筑結(jié)構(gòu)的規(guī)劃設(shè)計(jì)和鑒定評(píng)估提供依據(jù),具有明顯的現(xiàn)實(shí)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(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U211.3;TU973.2

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