预应力混凝土简支梁桥桥面连续结构行为研究

发布时间：2018-01-04 21:07

本文关键词：预应力混凝土简支梁桥桥面连续结构行为研究　出处：《西南交通大学》2014年硕士论文　论文类型：学位论文

【摘要】：简支梁桥已成为我国桥梁建设中采用的主要桥型,其中大多数为混凝土结构。为保证简支梁桥行车平顺,桥面连续结构被广泛采用。目前对于桥面连续结构行为机理的研究较少,桥面连续结构对主体结构的影响尚无定论,导致桥面连续结构通常以经验或构造要求进行设计,缺乏足够的理论支持；另一方面也导致桥面连续结构在使用过程中屡屡发生破坏。本文针对桥面连续结构的行为机理以及桥面连续结构对桥跨结构的影响进行分析研究,主要内容有： 1.介绍了带有桥面连续构造的简支梁桥的发展历程,国内外的研究现状；介绍了常见的三种桥面连续结构的构造形式。 2.基于线弹性理论,应用力法原理推导带有桥面连续构造的简支梁桥的内力计算方法。 3.简要介绍了有限元方法,针对带有桥面连续构造的简支梁桥,探讨了运用有限元方法的模拟思路。 4.运用通用有限元软件分别建立了跨径25m、跨径40m的带有桥面连续构造的简支T梁桥模型、跨径16m的桥面连续简支空心板梁桥模型以及对应的简支梁桥模型,分析了桥跨结构及桥面连续结构的受力行为,分析了次内力的影响,探讨了截面形式以及跨径对桥面连续简支梁桥的影响。在与简支梁桥进行对比后,分析两种桥型的内力与变形的差异,得出了比较重要的结论。
[Abstract]:Bridge has become the main type of the bridge construction in our country, most of the concrete structure. In order to ensure the bridge driving comfort, continuous deck structure is widely used. The present study on the mechanism of bridge deck structure behavior less influence of continuous deck structure of the main body structure is inconclusive, leading to continuous deck structure is usually designed to experience or structural requirements, lack of sufficient theoretical support; on the other hand lead to bridge deck structure in use in the course of repeated destruction. Analysis of the influence of the behavior mechanism of continuous deck structures and bridge deck structure of bridge structure, the main contents are:
1., the development history and the research status of simply supported beam bridge with continuous deck structure are introduced, and the three common structural forms of continuous deck structure are introduced.
2. based on the theory of linear elasticity and applying the principle of force method, the calculation method of internal force of a simple supported beam bridge with continuous bridge surface is derived.
3. the finite element method is briefly introduced, and the finite element method is discussed in view of the simple supported beam bridge with continuous bridge deck.
4. by using the general finite element software 25m span are established respectively, with simply supported T beam bridge continuous deck structure model 40m span, 16m span continuous deck simply supported hollow slab bridge model and corresponding bridge model, analyzes the bridge structure and continuous deck structure stress behavior, analysis of secondary internal force the influence effect of section shape and span of bridge deck continuous beam bridge. In comparison with the simply supported bridge, two bridge internal force difference analysis and deformation, the more important conclusion.

【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U441;U448.35

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