独柱墩曲线梁桥的抗倾覆与加固设计研究

发布时间：2018-03-20 20:31

本文选题：独柱墩曲线梁桥抗　切入点：倾覆能力　出处：《河北工业大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着我国经济建设的高速发展，城市规模的不断扩大，使得交通量也越来越大，，城市建设用地非常昂贵。因此，独柱墩曲线梁桥以其线条流畅、造型美观、占地面积小、工程造价低等多种优点得到了越来越多设计者的亲睐，并被广泛应用于城市桥梁的建设中。但由于对独柱墩曲线梁桥的独特受力特性缺乏足够的认识，在工程实践中经常发生事故。因此，对这类桥梁的抗倾覆研究与加固设计是十分重要和紧迫的。本论文是以河北省某桥为实例，对独柱墩曲线梁桥的受力特性、加固设计原理及方法进行了研究分析。本文主要研究的工作和主要成果如下： 1、介绍了关于独柱墩曲线梁桥的受力特性及计算方法。 2、阐述了桥梁常用加固技术的一般原则和加固方法，为独柱墩曲线梁桥的加固计算提供理论依据。 3、根据独柱墩曲线梁桥计算理论和数值计算方法，采用MIDAS/Civil有限元分析软件建立力学模型，分析桥梁的模态、周期阵型、支座反力、抗倾覆能力，以及造成横向倾覆的原因是桥梁的扭转刚度小。 4、介绍了钢结构加固的计算理论、方法。根据桥梁的自身的结构和受力情况，选择合适的有所创新的加固方案，并进行了加固计算。 5、对加固方案进行验算，并对桥梁加固前后的支座反力、模态、周期阵型、抗倾覆能力进行对比分析。可以看出通过加固，加固后桥梁刚度提高，横向抗倾覆能力提高，结构更加安全。
[Abstract]:With the rapid development of our country's economic construction and the continuous expansion of the city scale, the traffic volume is increasing and the land for urban construction is very expensive. Therefore, the curved girder bridge with single column pier has smooth lines, beautiful shape and small area. Many advantages, such as low engineering cost, have been favored by more and more designers and widely used in the construction of urban bridges. However, due to the lack of sufficient understanding of the unique mechanical characteristics of curved beam bridges with single column piers, Accidents often occur in engineering practice. Therefore, it is very important and urgent to study the overturning resistance and reinforce design of this kind of bridge. This paper takes a bridge in Hebei Province as an example to study the mechanical characteristics of curved girder bridge with single column pier. The principle and method of reinforcement design are studied and analyzed. The main work and main results of this paper are as follows:. 1. The stress characteristics and calculation method of curved beam bridge with single column pier are introduced. 2. The general principles and methods of strengthening bridge are expounded, which provide theoretical basis for strengthening calculation of curved beam bridge with single column pier. 3. According to the calculation theory and numerical method of curved beam bridge with single column pier, the mechanical model is established by using MIDAS/Civil finite element analysis software, and the modal, periodic formation, bearing reaction force and capsize resistance of the bridge are analyzed. And the reason of lateral overturning is that the torsional stiffness of the bridge is small. 4. The calculation theory and method of steel structure reinforcement are introduced. According to the structure and force situation of the bridge, a suitable and innovative reinforcement scheme is selected, and the reinforcement calculation is carried out. 5. Check and calculate the reinforcement scheme, and compare and analyze the support reaction force, mode, periodic formation and capsizing ability before and after reinforcement. It can be seen that after strengthening, the stiffness of the strengthened bridge is improved, and the lateral capsize resistance is improved. The structure is safer.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.72

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