大跨度波形钢腹板组合箱梁矮塔斜拉桥受力性能分析

发布时间：2018-04-30 11:42

本文选题：矮塔斜拉桥 + 波形钢腹板　；参考：《西南交通大学》2017年硕士论文

【摘要】：为明确大跨度多塔波形钢腹板组合箱梁矮塔斜拉桥的结构行为规律和研究单箱多室部分波形钢腹板组合箱梁结构的受力特性。以在建的一座单箱五室部分波形钢腹板组合箱梁三塔矮塔斜拉桥——山西运城至河南灵宝高速公路运宝黄河大桥(110m+2×200m+110m)为工程背景。采用有限元数值模拟方法,研究桥梁结构的静、动力特性,分析结构各方面受力性能以及结构的行为规律。主要完成以下工作:首先,介绍了波形钢腹板组合箱梁矮塔斜拉桥在国内外的发展现状,探讨了波形钢腹板矮塔斜拉桥的受力特点及其发展优势。其次,基于运宝黄河大桥工程背景,利用有限元软件Midas Civil建立全桥空间梁单元有限元模型,分析全桥主要施工阶段、运营阶段的一系列静力响应;在此基础上建立全桥动力分析有限元模型,计算桥梁结构自振特性,并分别采用地震反应谱响应分析方法和地震时程分析方法对桥梁进行地震响应分析研究。最后,利用有限元软件Midas FEA建立桥梁局部结构基于实体单元和板壳单元的有限元仿真模型,对其进行详细的局部受力分析。包括主梁单箱五室部分波形钢腹板组合箱梁的波腹板应力计算分析、波腹板抗剪屈曲分析、截面剪力分配研究、截面剪力滞效应分析以及内衬混凝土对波腹板剪应力和预应力施加效率的影响分析等。
[Abstract]:In order to clarify the structural behavior of long-span multi-tower corrugated steel web composite box girder with low tower cable-stayed bridge and to study the mechanical characteristics of single-box multi-chamber partial corrugated steel web composite box girder structure. The background of the project is a three-tower and low-tower cable-stayed bridge with three towers and low tower, which is under construction, with a single box and five-room partial waveform steel webs. The bridge is 110m 2 脳 200m 110m for the Huanghe River Bridge of Lingbao Expressway in Henan Province. Finite element numerical simulation method is used to study the static and dynamic characteristics of bridge structure. The main works are as follows: firstly, the development status of corrugated steel web composite box girder cable-stayed bridge with low tower at home and abroad is introduced, and the mechanical characteristics and development advantages of corrugated steel web low tower cable-stayed bridge are discussed. Secondly, based on the engineering background of Yunbao Yellow River Bridge, the finite element model of the space beam element of the whole bridge is established by using the finite element software Midas Civil, and a series of static responses of the main construction stage and operation stage of the whole bridge are analyzed. On this basis, the finite element model of the whole bridge dynamic analysis is established, and the natural vibration characteristics of the bridge structure are calculated. The seismic response analysis method and the seismic time history analysis method are used to analyze the seismic response of the bridge respectively. Finally, the finite element simulation model of local bridge structure based on solid element and shell element is established by using finite element software Midas FEA, and the local force is analyzed in detail. Including the calculation and analysis of the wave web stress, the shear buckling analysis of the wave web plate, and the research on the section shear force distribution of the composite box girder with single box and five chambers of corrugated steel webs. The shear lag effect of cross section and the effect of lining concrete on shear stress and prestressing efficiency of web plate are analyzed.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U441;U448.27

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