波形顶板-UHPC组合桥面板中组合销剪力连接件的力学特性研究

发布时间：2018-05-30 19:19

本文选题：波形顶板—UHPC组合桥面板 + 组合销剪力连接件　；参考：《西南交通大学》2017年硕士论文

【摘要】：波形顶板—UHPC组合桥而板通过减少焊缝和几何构型的不连续有效提高了正交异性钢桥面板的抗疲劳性能,是具有广阔应用前景的新型结构。结合组合销剪力连接件在组合梁中施工便捷、力学性能良好的优异性能,将其引入到波形顶板—UHPC组合桥面板中作为UHPC结构层与钢桥面板间的传力构件。探究适用于波形顶板—UHPC组合桥面板中组合销剪力连接件的合理构造形式,并深入研究组合销剪力连接件的极限承载力和破坏模式,以及在组合桥面板中的力学行为。主要研究工作如下:(1)调查和分析组合销剪力连接件的应用和研究现状,分析其施工和力学方面的优异性能及其用于波形顶板—UHPC组合桥面板中面临的主要问题,为下一阶段研究奠定基础;(2)波形顶板—UHPC组合桥面板中剪力连接件的合理设计研究。组合销剪力连接件是解决因结构层厚度变化而导致波形顶板组合桥面板钢板与结构层界面剪力件设计困难的较好方案。研究波形顶板—UHPC组合桥面板中组合销剪力连接件的合理的构造形式和几何尺寸,总结分析组合销剪力连接件不同破坏模式下的设计承载能力,对波形顶板—UHPC组合桥面板中组合销剪力连接件的设计提供参考依据;(3)通过设计推出试验模型,借助Abaqus有限元软件进行仿真分析组合销剪力连接件的极限承载力及失效机理,并分析影响承载能力的因素:高度、间距、钢销厚度、混凝土等级等,对其变化规律进行深入研究;(4)波形顶板—UHPC组合桥面板中组合销剪力连接件的静力性能和抗疲劳性能研究。通过极限承载力下波形顶板—UHPC组合桥面板中组合销的荷载滑移性能研究组合销剪力连接件的静力工作性能;基于名义应力法对组合销疲劳性能进行了研究。
[Abstract]:The fatigue resistance of orthotropic steel bridge panel is improved effectively by reducing the discontinuity of weld seam and geometric configuration. It is a new structure with broad application prospect. Combined with the advantages of convenient construction and good mechanical properties of the composite beam, the combined pin shear connection is introduced into the composite bridge deck as a force transfer member between the UHPC structure layer and the steel bridge slab. This paper probes into the reasonable construction form of the combined pin shear connection in the waveform roof UHPC composite bridge deck, and deeply studies the ultimate bearing capacity and failure mode of the composite pin shear connection, as well as the mechanical behavior in the composite bridge deck. The main research work is as follows: (1) investigation and analysis of the application and research status of composite pin shear connection, analysis of its excellent performance in construction and mechanics and the main problems faced in its application in waveform roof-UHPC composite bridge deck, The reasonable design of shear joint in the next stage of the research is studied, which is based on the waveform roof and UHPC composite bridge deck. The composite pin shear joint is a better scheme to solve the difficulty of designing the interface shear parts between the composite bridge deck plate and the structure layer caused by the change of the thickness of the structure layer. This paper studies the reasonable construction form and geometric size of the combined pin shear connection in the waveform roof UHPC composite bridge deck, and summarizes and analyzes the design bearing capacity of the composite pin shear connection under different failure modes. This paper provides a reference for the design of combined pin shear joint in the waveform roof UHPC composite bridge deck. Through the design of the test model, the ultimate bearing capacity and failure mechanism of the composite pin shear joint are simulated by Abaqus finite element software. The factors influencing bearing capacity are analyzed, such as height, spacing, thickness of steel pin, grade of concrete, etc. The static performance and fatigue resistance of the composite pin shear joint in the composite bridge deck with waveform roof and UHPC are studied. In this paper, the static behavior of the composite pin in the composite bridge deck is studied by means of the load-slip behavior of the composite pin in the ultimate bearing capacity, and the fatigue performance of the composite pin is studied based on the nominal stress method.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U443.31

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