钢-混凝土组合梁桥桥面铺装力学分析
发布时间：2018-11-15 07:24
【摘要】：钢-混凝土组合梁桥作为新兴桥梁类型,近年来在大、中跨径桥梁中得到广泛应用。然而,现行路面和桥梁设计规范缺少这一类桥梁的铺装层设计的详细规定。近年来随着我国交通量的显著增加,铺装层出现了很多病害,造成了巨大的经济损失。桥面铺装的受力状况与一般路面显著不同,其工作状态既有路面工程的特点,又有桥梁工程的特征。因此亟需从力学分析入手,建立一套完整的钢-混凝土梁桥桥面铺装分析方法,为铺装层的设计提供指导。本文以京台高速公路(北京段)工程瀛海镇高架B段钢-混凝土组合连续梁桥为背景,采用有限元分析方法,根据钢-混凝土组合梁桥结构特点,建立全桥模型,对铺装层受力状况进行了系统研究。首先,根据桥面铺装病害类型及其产生原因,考虑桥梁整体变形与局部车轮荷载的共同作用,得出桥梁墩顶位置处的钢梁腹板顶部正对位置为荷载最不利作用位置,并据其应力状态将铺装上层表面纵向拉应力、铺装上层表面纵向剪应力、铺装层与桥面板层间剪应力作为桥面铺装材料力学性能控制指标。然后,通过计算比较桥面铺装在不同模量、不同厚度条件下的受力状态,分析了铺装层各参数对其各项力学指标的影响,给出铺装层模量、厚度选择建议。结合我国国情,探讨了温度变化、汽车荷载变化对铺装层受力的影响,总结了铺装层在恶劣条件下的受力规律。最后,把桥面铺装材料、结构、气候、超载等因素联系在一起,提出了钢-混凝土组合梁桥铺装层设计流程及方法。
[Abstract]:As a new type of bridge, steel-concrete composite beam bridge has been widely used in large and medium span bridges in recent years. However, the current pavement and bridge design codes lack detailed provisions for the pavement design of this kind of bridges. In recent years, with the significant increase of traffic volume in China, there are many diseases in pavement, resulting in huge economic losses. The stress state of bridge deck pavement is obviously different from that of general pavement. The working state of bridge deck pavement has the characteristics of both pavement engineering and bridge engineering. Therefore, it is urgent to establish a complete analysis method of steel-concrete bridge deck pavement from mechanical analysis to provide guidance for pavement design. In this paper, based on Yinghai elevated B Duan Gang concrete composite continuous beam bridge of Jingtai Expressway (Beijing Section), the full bridge model is established according to the structural characteristics of steel-concrete composite beam bridge by using finite element analysis method. The stress state of pavement is studied systematically. Firstly, according to the types of bridge deck pavement diseases and their causes, considering the joint action of bridge deformation and local wheel load, it is concluded that the top of steel beam web at the top of bridge pier is the most unfavorable position of load. According to its stress state, the longitudinal tensile stress on the upper surface, the longitudinal shear stress on the upper surface of the pavement and the shear stress between the pavement and the bridge deck are taken as the control indexes of the mechanical properties of the deck pavement. Then, by calculating and comparing the stress state of bridge deck pavement under different modulus and thickness, the influence of each parameter of pavement on its mechanical index is analyzed, and the suggestions of pavement modulus and thickness selection are given. Combined with the situation of our country, the influence of temperature change and vehicle load change on the stress of pavement is discussed, and the stress law of pavement under bad conditions is summarized. Finally, the design process and method of steel-concrete composite beam bridge pavement layer are put forward by connecting the factors of bridge deck pavement material, structure, climate, overload and so on.
【学位授予单位】：北京工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U443.33
，
本文编号：2332555
[Abstract]:As a new type of bridge, steel-concrete composite beam bridge has been widely used in large and medium span bridges in recent years. However, the current pavement and bridge design codes lack detailed provisions for the pavement design of this kind of bridges. In recent years, with the significant increase of traffic volume in China, there are many diseases in pavement, resulting in huge economic losses. The stress state of bridge deck pavement is obviously different from that of general pavement. The working state of bridge deck pavement has the characteristics of both pavement engineering and bridge engineering. Therefore, it is urgent to establish a complete analysis method of steel-concrete bridge deck pavement from mechanical analysis to provide guidance for pavement design. In this paper, based on Yinghai elevated B Duan Gang concrete composite continuous beam bridge of Jingtai Expressway (Beijing Section), the full bridge model is established according to the structural characteristics of steel-concrete composite beam bridge by using finite element analysis method. The stress state of pavement is studied systematically. Firstly, according to the types of bridge deck pavement diseases and their causes, considering the joint action of bridge deformation and local wheel load, it is concluded that the top of steel beam web at the top of bridge pier is the most unfavorable position of load. According to its stress state, the longitudinal tensile stress on the upper surface, the longitudinal shear stress on the upper surface of the pavement and the shear stress between the pavement and the bridge deck are taken as the control indexes of the mechanical properties of the deck pavement. Then, by calculating and comparing the stress state of bridge deck pavement under different modulus and thickness, the influence of each parameter of pavement on its mechanical index is analyzed, and the suggestions of pavement modulus and thickness selection are given. Combined with the situation of our country, the influence of temperature change and vehicle load change on the stress of pavement is discussed, and the stress law of pavement under bad conditions is summarized. Finally, the design process and method of steel-concrete composite beam bridge pavement layer are put forward by connecting the factors of bridge deck pavement material, structure, climate, overload and so on.
【学位授予单位】：北京工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U443.33
，
本文编号：2332555
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