车—桥耦合振动作用下高速公路高陡边坡动力响应研究
发布时间：2018-12-24 15:07
【摘要】：摘要：随着西部大开发战略的不断深入和高速公路建设的迅速发展,出现了大量的桥基高陡边坡,而车辆-桥梁耦合振动会对边坡的稳定性造成影响。桥基边坡一旦遭到破坏,将会影响到桥梁结构的正常运营,甚至会给人民的生命财产带来隐患,因此研究车-桥耦合振动作用下高陡边坡的稳定性具有重要意义。本文对山店江大桥左线右侧边坡进行了静动力稳定性分析,所作的主要工作如下： 1.详细地介绍了车-桥耦合振动分析理论和计算模型,基于弹性系统动力学总势能不变值原理和形成矩阵的“对号入座”法则建立了车-桥动力耦合系统的运动方程。 2.利用ABAQUS有限元软件,建立了山店江大桥主桥左线右侧边坡的有限元模型,对其进行了自然状态、施工阶段和成桥阶段的静力稳定性分析,并采用车-桥耦合振动分析程序VBS-2对该桥上部结构进行动力计算,将其结果作为荷载分析了此边坡的动力稳定性。 3.讨论了不同桥基设计参数(桩基位置、桩基长度、桩基直径和坡度)对山店江大桥主桥左线右侧边坡静动力稳定性的影响。 4.讨论了不同车-桥动力参数(行驶速度、车辆载重、行车间距和桥面不平顺)对山店江大桥左幅主桥1#桥墩竖向力和桥下边坡的动力稳定性的影响。
[Abstract]:Absrtact: with the development of the western development strategy and the rapid development of highway construction, a large number of high and steep slopes of bridge foundation appear, and the vehicle-bridge coupling vibration will affect the stability of the slope. Once the bridge foundation slope is destroyed, it will affect the normal operation of the bridge structure and even bring hidden trouble to the people's life and property. Therefore, it is of great significance to study the stability of the high and steep slope under the vehicle-bridge coupling vibration. In this paper, the static and dynamic stability of the left and right side slope of Shandian River Bridge is analyzed. The main work is as follows: 1. The analysis theory and calculation model of vehicle-bridge coupling vibration are introduced in detail. Based on the principle of the total potential energy invariant value of elastic system dynamics and the law of "entering the seat" of forming matrix, the motion equation of the vehicle-bridge dynamic coupling system is established. 2. The finite element model of the left and right side slope of the main bridge of Shandian River Bridge is established by using the ABAQUS finite element software, and the static stability of the slope in the natural state, the construction stage and the completion stage is analyzed. The dynamic calculation of the superstructure of the bridge is carried out by using the vehicle-bridge coupled vibration analysis program VBS-2, and the dynamic stability of the slope is analyzed as a load. 3. The influence of different design parameters (pile position, pile length, pile diameter and slope) on the static and dynamic stability of the left and right side slope of the main bridge of Shandian River Bridge is discussed. 4. The influence of different vehicle-bridge dynamic parameters (driving speed, vehicle load, driving distance and deck irregularity) on the vertical force of pier of left main bridge of Shandian River Bridge and the dynamic stability of slope under the bridge is discussed.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.14;U441.3
[Abstract]:Absrtact: with the development of the western development strategy and the rapid development of highway construction, a large number of high and steep slopes of bridge foundation appear, and the vehicle-bridge coupling vibration will affect the stability of the slope. Once the bridge foundation slope is destroyed, it will affect the normal operation of the bridge structure and even bring hidden trouble to the people's life and property. Therefore, it is of great significance to study the stability of the high and steep slope under the vehicle-bridge coupling vibration. In this paper, the static and dynamic stability of the left and right side slope of Shandian River Bridge is analyzed. The main work is as follows: 1. The analysis theory and calculation model of vehicle-bridge coupling vibration are introduced in detail. Based on the principle of the total potential energy invariant value of elastic system dynamics and the law of "entering the seat" of forming matrix, the motion equation of the vehicle-bridge dynamic coupling system is established. 2. The finite element model of the left and right side slope of the main bridge of Shandian River Bridge is established by using the ABAQUS finite element software, and the static stability of the slope in the natural state, the construction stage and the completion stage is analyzed. The dynamic calculation of the superstructure of the bridge is carried out by using the vehicle-bridge coupled vibration analysis program VBS-2, and the dynamic stability of the slope is analyzed as a load. 3. The influence of different design parameters (pile position, pile length, pile diameter and slope) on the static and dynamic stability of the left and right side slope of the main bridge of Shandian River Bridge is discussed. 4. The influence of different vehicle-bridge dynamic parameters (driving speed, vehicle load, driving distance and deck irregularity) on the vertical force of pier of left main bridge of Shandian River Bridge and the dynamic stability of slope under the bridge is discussed.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.14;U441.3
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