土工合成材料加筋土路堤的地震反应规律与抗震优化设计方法

发布时间：2021-04-21 04:00

　　桥梁、路堤、隧道等道路结构通常用于方便运输。这些结构在地震中经常面临不同程度的破坏。这些结构的性能在地震后需要保持在一定的水平,这将有助于道路通信系统在地震后很容易恢复正常。为了达到这一目的,我们需要在施工期间对这些结构进行抗震加固。地震通常有不同的震级和强度。这意味着地震对道路结构造成的破坏程度将取决于地震的震级和强度。因此,为了更好地进行道路结构的抗震设计,我们需要进行一些室内试验来了解这种结构的抗震性能。本文探讨了如何利用土工合成材料增强路堤的抗震性能。为了更好地了解土工合成材料加筋土的抗震性能和使用土工合成材料加筋土的重要性,对土工合成材料加筋路堤进行了大型振动台模型试验,并进行了5次模拟。五个模拟中的第一个是模拟无筋路堤的地震响应。第二个模拟是三层土工格栅加筋路堤的地震反应模拟。第三个模拟是五层土工格栅加筋路堤的地震反应模拟。第四个模拟是6层土工格栅加筋路堤的地震反应模拟。最后模拟了11层土工格栅加筋路堤的地震反应。在有限元分析中,利用模拟软件Abaqus 2020对无土工合成材料加筋路堤和有土工合成材料加筋路堤的抗震性能进行了模拟分析。数值分析中使用的路堤材料的工程特性是通... 

【文章来源】：哈尔滨工业大学黑龙江省 211工程院校 985工程院校

【文章页数】：110 页

【学位级别】：硕士

【文章目录】：
摘要
ABSTRACT
Chapter 1 Introduction
    1.1 Background,Objective and Significance of the Subject
    1.2 Research status and trend at home and abroad
        1.2.1 Application and development of geosynthetics at home and abroad
        1.2.2 Research and application status of geosynthetics
    1.3 Main contents and the organization of the research
        1.3.1 Main contents
        1.3.2 Organization of the research
Chapter 2 Theoretical Study of the Design of Geosynthetic Reinforced Embankments
    2.1 Introduction
    2.2 Techniques used in road embankment reinforcement
        2.2.1 Crest reinforcement structure
        2.2.2 Toe reinforcement structure
        2.2.3 Artificial base ground structure
        2.2.4 Barrier reinforcement structure
    2.3 Material Properties of Geosynthetics
        2.3.1 Physical properties
        2.3.2 Mechanical Properties
        2.3.3 Hydraulic Properties
        2.3.4 Endurance Properties
        2.3.5 Degradation
    2.4 Geosynthetic Reinforcement Mechanism
    2.5 Design of Geosynthetic Reinforced Embankment
        2.5.1 Design Approach
        2.5.2 Factor of Safety
        2.5.3 Evaluation of tensile characteristics for design
        2.5.4 Soil-Reinforcement Interaction Characteristics
        2.5.5 Simplified Design of Embankments on Weak Foundations
    2.6 Brief Summary
Chapter 3 Seismic Response of Geosynthetic Reinforced Embankments in Shaking Table Model Test
    3.1 Introduction
    3.2 Classification of seismic failure of embankments
    3.3 Stability analysis of the geosynthetic reinforced embankment
    3.4 Overview of seismic simulation shaking table test
        3.4.1 Development of seismic simulation shaking table test
        3.4.2 Basic structure and working principle of electro-hydraulic servo shaking table
        3.4.3 Seismic simulation shaking table parameters adopted in this study
    3.5 Basic theory and post-processing method based on shaking table test model
        3.5.1 Establishment of similarity ratio
        3.5.2 Post processing method of model dynamic characteristic test data
        3.5.3 Post processing method for the dynamic response test data of model
    3.6 Seismic wave reconstruction of shaking table
    3.7 Overview of shaking table model experiment design
        3.7.1 Model design
        3.7.2 Experimental loading system
        3.7.3 Shaking table model test results of general embankment
            3.7.3.1 Distribution diagram of seismic force under seismic action
            3.7.3.2 Preliminary conclusion
    3.8 Brief summary
Chapter 4 Road Embankment Simulations and Analysis
    4.1 Introduction
    4.2 Parameter seismic design of road embankment with and without geosynthetic reinforcements
    4.3 Seismic Simulation of Road Embankment
        4.3.1Parts
        4.3.2 Properties
        4.3.3 Assembly
        4.3.4 Steps
        4.3.5 Interactions
        4.3.6 Loads and Boundary Conditions
        4.3.7 Mesh
        4.3.8 Job
        4.3.9 Simulation results
            4.3.9.1 Unreinforced embankment
            4.3.9.2 Reinforced embankment-Case 1
            4.3.9.3 Reinforced embankment-Case 2
            4.3.9.4 Reinforced embankment-Case 3
            4.3.9.5 Reinforced embankment-Case 4
        4.3.10 Analysis of simulation results
            4.3.10.1 Analysis of peak dynamic earth pressure
            4.3.10.2 Analysis of the vertical displacement of the embankments
            4.3.10.3 Analysis of the horizontal displacement of the embankments
            4.3.10.4 Analysis of the stress distribution in the foundation soil of the embankments
    4.4 Brief Summary
Conclusion
结论
References
Acknowledgement



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