预应力连续刚构—钢管混凝土拱组合体系结构行为分析

发布时间：2018-10-09 07:24

【摘要】：桥梁是人类在生产与生活中,为跨越山涧、不良地质或满足其他交通需要而架设的使通行更加便捷的建筑物。预应力连续刚构-钢管混凝土拱桥是桥梁中重要的组成类型,结合了拱桥与刚构桥的特点,具有跨越能力大、耐久性好、施工更方便(无需体系转换)、外形美观、适应能力更强(适合在山谷、河流中建高柔墩)、无需大型支座等许多优点,在桥梁中展现出良好的发展势头。本文以预应力连续刚构-钢管混凝土拱桥为研究对象,对桥梁的梁拱组合体系进行结构行为分析。本文主要研究内容如下:(1)概述了中国拱桥的发展情况、拱式组合桥的类型及特点、异型拱-刚构组合梁桥的优点及存在的问题和工程背景。(2)预应力连续刚构-钢管混凝土拱桥的有限元建模,建模参照的相关标准与规范,以及使用的相关技术指标,采用的相关材料。本论文运用midas Civil有限元软件进行模拟桥梁三维建模分析研究。(3)预应力连续刚构-钢管混凝土拱桥进行静力结构分析,对预应力连续刚构-钢管混凝土拱桥的承载能力、正常使用、短暂应力分析研究,及桥梁钢箱梁拱圈应力分析,还对桥梁端横梁作出静力分析。(4)预应力连续刚构-钢管混凝土拱桥进行特征值分析,采用子空间迭代法与Ritz向量法对比分析,并进行桥梁在有无钢管混凝土拱下特征值对比分析。(5)分析预应力连续刚构-钢管混凝土拱桥在去拱后,运用反应谱分析对比研究。本论文进行对异形拱-刚构组合梁桥有无钢管混凝土拱的建模,并进行结构行为分析,为以后类似桥梁的研究提供参考。
[Abstract]:Bridge is a kind of building built by people in order to cross mountain stream, bad geology or meet other traffic needs in production and life. Prestressed continuous rigid-frame-concrete-filled steel tube arch bridge is an important type of bridge. It combines the characteristics of arch bridge and rigid frame bridge. It has the advantages of large span ability, good durability, convenient construction (no system transformation) and beautiful appearance. It is more adaptable (suitable for building high and flexible piers in valleys and rivers) and does not need large supports and many other advantages, showing good development momentum in bridges. In this paper, the prestressed continuous rigid-frame-concrete-filled steel tube arch bridge is taken as the research object, and the structural behavior of the composite system of beam and arch of the bridge is analyzed. The main contents of this paper are as follows: (1) the development of arch bridges in China, the types and characteristics of arch composite bridges are summarized. The advantages, problems and engineering background of special-shaped arch and rigid frame composite beam bridge. (2) finite element modeling of prestressed continuous rigid-frame-steel tubular arch bridge, relevant standards and codes for modeling reference, and relevant technical specifications for use. Relevant materials used. In this paper, midas Civil finite element software is used to simulate the three-dimensional modeling and analysis of bridge. (3) static structure analysis of prestressed continuous rigid-frame-concrete filled steel tube arch bridge is carried out, and the bearing capacity of prestressed continuous rigid frame-steel tube arch bridge is analyzed. In normal use, transient stress analysis and stress analysis of steel box girder arch ring of bridge, static analysis of bridge end beam is also made. (4) Prestressed continuous rigid frame-concrete filled steel tube arch bridge is analyzed by eigenvalue analysis. The subspace iteration method and Ritz vector method are used to compare and analyze the eigenvalues of bridges with or without concrete filled steel tube arch. (5) the response spectrum analysis of prestressed continuous rigid frame-concrete filled steel tube arch bridge after arch removal is analyzed. In this paper, the model of concrete-filled steel tube arch in special-shaped arch and rigid frame composite beam bridge is established, and the structural behavior is analyzed, which provides a reference for the research of similar bridges in the future.
【学位授予单位】：西华大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U441

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