旅游观光轻轨桥梁结构设计与分析
发布时间：2018-10-13 14:00
【摘要】：旅游观光轻轨桥梁结构是一种新型的轨道桥梁结构型式。目前这类轨道结构土建及机电设备的设计安装通常由厂家全部负责,按企业标准执行。尤其是土建结构部分,设计施工没有特定的国家统一标准和要求,因此有必要对旅游观光轻轨桥梁结构的计算和分析作深入研究。本文在深入研究跨座式单轨交通以及大型游乐设施等结构已有研究成果的基础上,首先简述了旅游观光轻轨桥梁的发展历程,接着从旅游观光轻轨桥梁结构的结构体系、构造及选择依据入手,结合工程实际,深入研究分析了旅游观光轻轨桥梁结构的设计准则和指标要求,最后给出了现场的桥梁结构的静动力测试和监测结果。经过本分析,得到以下主要结论:1、旅游观光轻轨桥梁结构通常采用环形钢结构体系,一要适应小半径、大纵坡的结构要求,二要适应景区景观及城市管网的场地要求,桥梁结构的上部轨道梁、下部墩柱、基础及连接部分构造的选择需要仔细斟酌比选。2、对于桥窄跨长的旅游观光轻轨桥梁结构而言,强度计算虽仍采用较为保守的容许应力法,但往往不控制设计。而桥梁结构的纵横向刚度、频率及稳定性指标通常是结构设计的控制性因素。结构的一阶振型主要以主梁侧弯为主,横向的刚度问题往往控制设计。结构发生竖弯主要集中在第四~六阶,几乎没有出现第一阶基频产生竖弯的情况,这与常规桥梁结构的受力模态有较大差异。3、旅游观光轻轨桥梁结构的结构静动力测试与监测内容包括桥跨结构在静荷载作用下应力、挠度以及在动荷载作用下的加速度、自振频率、冲击系数、阻尼比等方面的内容,通过测试,可以达到全面评价桥跨结构工作性能的目的。4、针对旅游观光轻轨桥梁结构的特点,还提出了一些改进建议:(1)在箱梁顶板优先选用耐候钢,以解决顶板因磨滑而产生的耐久性问题;(2)给出了提高轮轨在大坡段抗滑能力的措施;(3)从人性化设计角度出发,建议在轨道两侧一定范围内设置紧急疏散通道,给旅游观光轻轨列车的后续研究工作提供了良好的思路和切入点,有利促进旅游观光列车的发展。
[Abstract]:Tourist light rail bridge structure is a new type of rail bridge structure. At present, the design and installation of this kind of track structure and mechanical and electrical equipment are usually the responsibility of the manufacturer, according to the enterprise standards. Especially in the part of civil structure, there is no specific national uniform standard and requirement in design and construction, so it is necessary to study the calculation and analysis of the bridge structure of tourism light rail. On the basis of deep research on the structure of straddle monorail transportation and large amusement facilities, this paper firstly introduces the development course of tourism light rail bridge, and then from the structure system of tourism light rail bridge. On the basis of construction and selection, combined with the engineering practice, the design criteria and index requirements of the bridge structure of tourism light rail are studied and analyzed in depth. Finally, the static and dynamic test and monitoring results of the bridge structure on site are given. Through this analysis, the main conclusions are as follows: 1. The bridge structure of tourism and sightseeing light rail usually adopts ring steel structure system. Firstly, it should adapt to the structural requirements of small radius and large longitudinal slope, and second, it should adapt to the site requirements of scenic spots and urban pipe networks. The selection of the upper track beam, the lower pier column, the foundation and the connecting part of the bridge structure needs careful consideration and comparison. 2. For the bridge structure with narrow span, the strength calculation still adopts the conservative allowable stress method. But often do not control the design. The longitudinal and horizontal stiffness, frequency and stability of bridge structure are usually the controlling factors of structural design. The first-order vibration mode of the structure is mainly the lateral bending of the main beam, and the lateral stiffness problem often controls the design. The vertical bending of the structure is mainly concentrated in the fourth to sixth order, and there is almost no vertical bending of the first fundamental frequency. This is quite different from the stress modes of the conventional bridge structure. 3. The static and dynamic test and monitoring contents of the tourist light rail bridge structure include the stress, deflection and acceleration of the bridge span structure under the static load, the deflection and the acceleration under the dynamic load. The contents of the natural vibration frequency, impact coefficient, damping ratio and so on can achieve the purpose of comprehensively evaluating the working performance of the bridge span structure through testing. 4, aiming at the characteristics of the tourist light rail bridge structure, Some improvement suggestions are also put forward: (1) the weathering steel is preferred in the roof of box girder to solve the durability problem of roof caused by wear and slip; (2) the measures to improve the skid resistance of wheel / rail in large slope are given; (3) from the point of view of humanized design, It is suggested that emergency evacuation channels should be set up within a certain range on both sides of the track, which provides a good train of thought and a breakthrough point for the further study of the tourism light rail train, and is beneficial to the development of the tourist train.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U442.5
本文编号：2268896
[Abstract]:Tourist light rail bridge structure is a new type of rail bridge structure. At present, the design and installation of this kind of track structure and mechanical and electrical equipment are usually the responsibility of the manufacturer, according to the enterprise standards. Especially in the part of civil structure, there is no specific national uniform standard and requirement in design and construction, so it is necessary to study the calculation and analysis of the bridge structure of tourism light rail. On the basis of deep research on the structure of straddle monorail transportation and large amusement facilities, this paper firstly introduces the development course of tourism light rail bridge, and then from the structure system of tourism light rail bridge. On the basis of construction and selection, combined with the engineering practice, the design criteria and index requirements of the bridge structure of tourism light rail are studied and analyzed in depth. Finally, the static and dynamic test and monitoring results of the bridge structure on site are given. Through this analysis, the main conclusions are as follows: 1. The bridge structure of tourism and sightseeing light rail usually adopts ring steel structure system. Firstly, it should adapt to the structural requirements of small radius and large longitudinal slope, and second, it should adapt to the site requirements of scenic spots and urban pipe networks. The selection of the upper track beam, the lower pier column, the foundation and the connecting part of the bridge structure needs careful consideration and comparison. 2. For the bridge structure with narrow span, the strength calculation still adopts the conservative allowable stress method. But often do not control the design. The longitudinal and horizontal stiffness, frequency and stability of bridge structure are usually the controlling factors of structural design. The first-order vibration mode of the structure is mainly the lateral bending of the main beam, and the lateral stiffness problem often controls the design. The vertical bending of the structure is mainly concentrated in the fourth to sixth order, and there is almost no vertical bending of the first fundamental frequency. This is quite different from the stress modes of the conventional bridge structure. 3. The static and dynamic test and monitoring contents of the tourist light rail bridge structure include the stress, deflection and acceleration of the bridge span structure under the static load, the deflection and the acceleration under the dynamic load. The contents of the natural vibration frequency, impact coefficient, damping ratio and so on can achieve the purpose of comprehensively evaluating the working performance of the bridge span structure through testing. 4, aiming at the characteristics of the tourist light rail bridge structure, Some improvement suggestions are also put forward: (1) the weathering steel is preferred in the roof of box girder to solve the durability problem of roof caused by wear and slip; (2) the measures to improve the skid resistance of wheel / rail in large slope are given; (3) from the point of view of humanized design, It is suggested that emergency evacuation channels should be set up within a certain range on both sides of the track, which provides a good train of thought and a breakthrough point for the further study of the tourism light rail train, and is beneficial to the development of the tourist train.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U442.5
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