邻近公路深基坑板桩墙围护结构的动力响应分析
发布时间：2023-05-13 00:38
本文利用有限元软件PLAXIS 3D,分析了板桩墙深基坑在移动车辆荷载作用下的动力响应。在临近公路的深基坑三维有限元模型中,从ASSHTO规范中选取了两种类型的车辆,来研究板桩墙在移动车辆荷载作用下的动力响应。为了反映实际车辆的行驶情况,对路面上的车辆轮胎载荷进行了建模,并考虑了车辆类型、车速、公路与开挖基坑之间的净距等主要参数。通过数值模拟,研究了这些参数对板桩墙深基坑在施工过程中的影响。为了进行这项研究,首先从微元体出发,推导了岩土系统的动力学方程。此外,对车辆运行特性的动载荷进行了建模分析,并在随机过程中给出了车辆附加动载荷的方程。随后,利用有限元软件PLAXIS 3D对板桩墙的动力响应进行了全耦合和非耦合流固分析。最后,对这些方法进行了简要的论证和总结。根据上述分析的数值结果,得到以下主要结论:(1)车辆荷载、车速及开挖基坑与公路之间距离等主要参数对挡土墙的性能有显着影响。因此,板桩墙和支护体系的材料性能应合理选择,且墙必须有足够的埋深;(2)值得注意的是,当公路与开挖净距的增大,车辆荷载分布对上墙的影响略有减小,但对板桩墙下部的影响仍然较大;(3)由于研究周期短,墙端的土层渗...
【文章页数】：106 页
【学位级别】：硕士
【文章目录】：
ACKNOWLEDGEMENT
摘要
ABSTRACT
1. INTRODUCTION
1.1. BACKGROUND OF RESEARCH
1.2. STATEMENT OF THE PROBLEM
1.3. RESEARCH OBJECTIVES
1.4. PURPOSE OF RESEARCH
1.5. RELEVANT PRIOR RESEARCH
1.6. THESIS OUTLINE
2. DYNAMIC FINITE ELEMENT EQUATIONS OF GEOTECHNICALSYSTEM
2.1. INTRODUCTION
2.2. FINITE ELEMENT FORMULATION FOR DYNAMIC ANALYSIS
2.3. TIME INTEGRATION
2.4. THE UTILIZATION OF FINITE ELEMENT METHOD IN PLAXIS 3D
2.4.1. Mesh of soil volume
2.4.2. Computation of the deformation of soil element
3. DYNAMIC LOAD CHARACTERISTICS OF RUNNING TRUCK
3.1. INTRODUCTION
3.2.T WO DEGREES OF FREEDOM VEHICLE VIBRATION MODEL AND DYNAMIC LOADCOEFFICIENT(DLC)
3.2.1. Two degrees of freedom single wheel vehicle model
3.2.2. Amplitude-frequency solutions for additional dynamic load
3.2.3. Computation of dynamic load coefficient(DLC)
3.3. TYPE OF VEHICLES
3.4. APPLIED LOADING AREA
3.5. COMPUTATIONAL CALCULATION WITH PARAMETERS
3.5.1. Relationship between PSD of DLC and vibration frequency
3.5.2. Relationship between additional dynamic load and DLC
3.6. IMPLEMENTAION OF LOAD APPLYING IN PLAXIS 3D
4. DYNAMIC RESPONSE OF SHEET-PILE WALL SUBJECT TO DYNAMICLOADS OF RUNNING TRUCKS WITH FULLY COUPLED SOLID-FLUIDANALYSIS
4.1. INTRODUCTION
4.2. FULLY COUPLED SOLID-FLUID EQUATIONS
4.3. OVERVIEW OF THE PROJECT
4.4. NUMERICAL MODELING AND CALCULATION
4.4.1. Material properties of soils and structural elements
4.4.2. Simulation of the project
4.4.3. Performing calculation
4.5. RESULTS AND DISCUSSION
4.5.1. Wall displacement
4.5.2. Wall bending moment
4.5.3. Total pore water pressure behind sheet-pile wall
4.5.4. Effective stress behind sheet-pile wall
5. DYNAMIC RESPONSE OF SHEET-PILE WALL SUBJECT TO DYNAMICLOADS OF RUNNING TRUCKS WITH UNCOUPLED SOLID-FLUIDANALYSIS
5.1. INTRODUCTION
5.2. UNCOUPLED SOLID-FLUID EQUATIONS
5.3. NUMERICAL MODELING AND CALCULATION
5.4. RESULTS AND DISCUSSION
5.4.1. Wall displacement
5.4.2. Wall bending moment
5.4.3. Total pore water pressure behind sheet-pile wall
5.4.4. Effective stress behind sheet-pile wall
5.5. COMPARISON OF COUPLED AND UNCOUPLED SOLID-FLUID RESULTS
5.5.1. Wall displacement
5.5.2. Wall bending moment
5.5.3. Total water pressure behind sheet-pile wall
5.5.4. Effective stress behind sheet-pile wall
6. CONCLUSIONS
6.1. CONCLUSIONS AND REMARKS
6.2. FUTURE RESEARCH
REFERENCES
DATA FOR THE MASTER'S THESIS
本文编号：3814952
【文章页数】：106 页
【学位级别】：硕士
【文章目录】：
ACKNOWLEDGEMENT
摘要
ABSTRACT
1. INTRODUCTION
1.1. BACKGROUND OF RESEARCH
1.2. STATEMENT OF THE PROBLEM
1.3. RESEARCH OBJECTIVES
1.4. PURPOSE OF RESEARCH
1.5. RELEVANT PRIOR RESEARCH
1.6. THESIS OUTLINE
2. DYNAMIC FINITE ELEMENT EQUATIONS OF GEOTECHNICALSYSTEM
2.1. INTRODUCTION
2.2. FINITE ELEMENT FORMULATION FOR DYNAMIC ANALYSIS
2.3. TIME INTEGRATION
2.4. THE UTILIZATION OF FINITE ELEMENT METHOD IN PLAXIS 3D
2.4.1. Mesh of soil volume
2.4.2. Computation of the deformation of soil element
3. DYNAMIC LOAD CHARACTERISTICS OF RUNNING TRUCK
3.1. INTRODUCTION
3.2.T WO DEGREES OF FREEDOM VEHICLE VIBRATION MODEL AND DYNAMIC LOADCOEFFICIENT(DLC)
3.2.1. Two degrees of freedom single wheel vehicle model
3.2.2. Amplitude-frequency solutions for additional dynamic load
3.2.3. Computation of dynamic load coefficient(DLC)
3.3. TYPE OF VEHICLES
3.4. APPLIED LOADING AREA
3.5. COMPUTATIONAL CALCULATION WITH PARAMETERS
3.5.1. Relationship between PSD of DLC and vibration frequency
3.5.2. Relationship between additional dynamic load and DLC
3.6. IMPLEMENTAION OF LOAD APPLYING IN PLAXIS 3D
4. DYNAMIC RESPONSE OF SHEET-PILE WALL SUBJECT TO DYNAMICLOADS OF RUNNING TRUCKS WITH FULLY COUPLED SOLID-FLUIDANALYSIS
4.1. INTRODUCTION
4.2. FULLY COUPLED SOLID-FLUID EQUATIONS
4.3. OVERVIEW OF THE PROJECT
4.4. NUMERICAL MODELING AND CALCULATION
4.4.1. Material properties of soils and structural elements
4.4.2. Simulation of the project
4.4.3. Performing calculation
4.5. RESULTS AND DISCUSSION
4.5.1. Wall displacement
4.5.2. Wall bending moment
4.5.3. Total pore water pressure behind sheet-pile wall
4.5.4. Effective stress behind sheet-pile wall
5. DYNAMIC RESPONSE OF SHEET-PILE WALL SUBJECT TO DYNAMICLOADS OF RUNNING TRUCKS WITH UNCOUPLED SOLID-FLUIDANALYSIS
5.1. INTRODUCTION
5.2. UNCOUPLED SOLID-FLUID EQUATIONS
5.3. NUMERICAL MODELING AND CALCULATION
5.4. RESULTS AND DISCUSSION
5.4.1. Wall displacement
5.4.2. Wall bending moment
5.4.3. Total pore water pressure behind sheet-pile wall
5.4.4. Effective stress behind sheet-pile wall
5.5. COMPARISON OF COUPLED AND UNCOUPLED SOLID-FLUID RESULTS
5.5.1. Wall displacement
5.5.2. Wall bending moment
5.5.3. Total water pressure behind sheet-pile wall
5.5.4. Effective stress behind sheet-pile wall
6. CONCLUSIONS
6.1. CONCLUSIONS AND REMARKS
6.2. FUTURE RESEARCH
REFERENCES
DATA FOR THE MASTER'S THESIS
本文编号：3814952
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