重载交通水泥混凝土特大桥桥面铺装受力分析及关键技术研究

发布时间：2018-03-01 13:16

本文关键词： 水泥混凝土桥桥面铺装沥青混凝土力学分析　出处：《河北工业大学》2014年博士论文　论文类型：学位论文

【摘要】：桥梁作为公路交通运输网中重要的枢纽和节点，起到至关重要的作用。由于实际应用中往往由于结构组合形式、荷载、环境和振动、大挠度变形等特殊使用条件，导致桥梁铺装结构使用寿命往往远低于一般的路面结构。本文采用理论分析、室内材料试验和实体工程验证的方法进行研究，理论分析中，采用有限元通用分析软件ANSYS，建立桥梁上部结构与铺装系复合结构分析模型，重点分析沥青混凝土层厚度、层间黏结状态对应力、应变分布状态的影响，并以此为基础提出桥面铺装结构形式的依据。室内材料试验中，通过提出新的级配设计和最佳配合比设计方法，实现按照桥面铺装使用功能进行材料设计的目标，针对桥面使用过程中典型损坏特征，重点进行抗车辙能力，水损害能力和层间抗剪能力的评价。通过研发包含桥梁上部结构与铺装系沥青混凝土层复合结构实体模型的动态测试方法，结构响应的初步测试，并与有限元模型建立的理论结果进行比较和修正。根据水泥混凝土桥、沥青铺装层结构和材料特点，制定对应的施工工艺。并通过实体工程验证各项工艺措施的合理性和有效性，完善桥面铺装施工技术方法。最终，提出了基于功能需求的水泥混凝土桥面倒装式沥青混凝土铺装结构，骨架嵌挤型级配的构成和设计方法，基于最紧密嵌挤状态的沥青混合料最佳油石比确定方法，，并且建立了桥面铺装系单元足尺结构试验平台，提出了基于单元足尺桥面结构模型的桥面铺装系力学响应试验测试方法。
[Abstract]:Bridge, as an important hub and node in highway transportation network, plays an important role. In practical application, it is often due to special application conditions such as structure combination form, load, environment and vibration, large deflection deformation, etc. As a result, the service life of bridge pavement structure is much lower than that of normal pavement structure. In this paper, the methods of theoretical analysis, indoor material test and solid engineering verification are adopted. In the theoretical analysis, the composite structure analysis model of bridge superstructure and paving system is established by using the finite element general analysis software ANSYS. The influence of asphalt concrete layer thickness and interlayer bonding state on stress and strain distribution is analyzed, and the basis of bridge deck pavement structure is put forward. A new method of grading design and optimum proportion design is put forward to achieve the purpose of material design according to the function of bridge deck pavement. Aiming at the typical damage characteristics of bridge deck during the use of the bridge deck, the anti-rutting ability is emphasized. Evaluation of water damage capacity and interstory shear resistance. Through the research and development of dynamic testing method including bridge superstructure and pavement asphalt concrete composite structure solid model, the preliminary test of structure response, And compared with the theoretical results of finite element model, according to the characteristics of cement concrete bridge, asphalt pavement structure and material, The corresponding construction technology is worked out, and the rationality and validity of the various technical measures are verified through the entity engineering, and the technical methods of bridge deck pavement construction are improved. Finally, the paper puts forward the structure and design method of asphalt concrete overlay structure, skeleton and extrusion grade of cement concrete bridge deck based on functional requirements, and the method of determining the best asphalt mixture ratio based on the most closely squeezed state. The test platform of full-scale structure of bridge deck pavement system is established, and the test method of mechanical response of deck pavement system based on element full-scale bridge deck structure model is put forward.
【学位授予单位】：河北工业大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：U448.33;U443.33

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