独塔混合梁斜拉桥施工过程分析

发布时间：2018-03-22 19:09

本文选题：异形独塔　切入点：混合梁斜拉桥　出处：《西南交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：现代斜拉桥发展至今已有整整六十个年头。科学技术的进步带动着斜拉桥的发展,衍生出各式各样各具特色的斜拉桥.。其中,独塔混合梁斜拉桥以其优良的力学性能、合理的造价及多变的造型而被广泛采用。该论文以某在建的斜拉桥为工程背景,对支架法施工的独塔混合梁斜拉桥的施工过程进行分析。主要通过以下几个方面展开：1.简单介绍了斜拉桥的整体发展现状、构造特征及施工技术。2.通过大型桥梁软件Midas/Civil2012建立仿真模型进行有限元分析,分析了该桥施工全过程中的结构行为。具体包括施工过程的分析和成桥后运营阶段的分析两个方面。3.在施工阶段分析中,选取主梁、斜拉索及桥塔作为主要研究对象,分析了在施工过程中各阶段主梁和斜拉索应力、位移等关键控制数据变化规律,用以指导施工。由于该桥主梁采用支架施工,主要对斜拉索张拉过程中主梁脱架的安全性进行分析。同时,确保斜拉索在张拉过程中应力不超限。4.针对该桥的异形桥塔的施工,建立包含劲性骨架的桥塔施工过程有限元模型,分析其施工过程中受力情况及施工安全性。5.为考虑后续运营阶段荷载对结构的影响,对成桥后单项荷载及组合荷载作用下的主梁及斜拉索的静力效应进行分析,研究结构的安全性。
[Abstract]:It has been 60 years since the development of modern cable-stayed bridges. The progress of science and technology has led to the development of cable-stayed bridges, resulting in a variety of cable-stayed bridges with different characteristics. Among them, single-tower hybrid cable-stayed bridges have excellent mechanical properties. Reasonable cost and variable shape are widely used. This paper takes a certain cable-stayed bridge under construction as the engineering background. This paper analyzes the construction process of single tower hybrid girder cable-stayed bridge constructed by support method. It mainly introduces the overall development of cable-stayed bridge through the following several aspects: 1. The structural characteristics and construction technology .2.The finite element analysis is carried out by establishing the simulation model through the large-scale bridge software Midas/Civil2012. This paper analyzes the structural behavior of the bridge during the whole process of construction, including the analysis of the construction process and the analysis of the operation stage after the completion of the bridge. 3. In the analysis of the construction stage, the main beam, cable and tower are selected as the main research objects. The variation law of key control data, such as stress and displacement of main girder and stay cable in each stage of construction, is analyzed to guide the construction. Because the main girder of the bridge is constructed with support, This paper mainly analyzes the security of the main beam in the process of cable tension. At the same time, it ensures that the stress of the cable in the process of tension is not out of the limit. 4. In view of the construction of the special shaped bridge tower of the bridge, The finite element model of bridge tower construction process including rigid skeleton is established, and the stress situation and construction safety during the construction process are analyzed. 5. In order to consider the influence of the load on the structure in the subsequent operation stage, the finite element model of the bridge tower construction process is established. The static effect of main beam and cable under single load and combined load is analyzed and the safety of the structure is studied.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4;U448.27

【参考文献】