波纹钢腹板组合箱梁矮塔斜拉桥力学性能分析

发布时间：2018-03-24 10:05

本文选题：波纹钢腹板　切入点：矮塔斜拉桥　出处：《长安大学》2014年硕士论文

【摘要】：随着我国大跨径桥梁的迅速发展，波纹钢腹板组合箱梁矮塔斜拉桥这种新兴的桥梁结构形式，凭借其结构自重轻、建造成本低、施工周期短及抗震性能好等诸多优点得到了广泛的应用。本文以孙武黄河大桥主桥波纹钢腹板组合箱梁矮塔斜拉桥方案为原型，结合现有矮塔斜拉桥的应用经验，通过建立有限元模型，分析了波纹钢腹板组合箱梁矮塔斜拉桥的静力、动力及整体稳定性能，并进行了主梁波纹钢腹板剪切屈曲强度验算，主要完成了以下工作：首先介绍了波纹钢腹板组合箱梁矮塔斜拉桥的结构形式与受力特点；阐述了波纹钢腹板组合箱梁矮塔斜拉桥的静力、动力性能及稳定性能研究现状。采用有限元方法计算波纹钢腹板组合箱梁矮塔斜拉桥在施工阶段、成桥阶段及运营阶段荷载作用下结构的受力状态，结果显示，结构受力合理，具有足够的安全储备；通过建立无斜拉索作用桥梁作为对比，重点分析了矮塔斜拉桥在移动荷载作用下，主梁与斜拉索的受力状态，结果说明荷载主要由主梁承担，，斜拉索对结构受力基本无影响。本文利用有限元方法对比分析了矮塔斜拉桥及等跨径刚构-连续组合梁桥的动力特性，结果显示二者动力特性相类似；采用线性反应谱分析方法进行了桥梁结构地震响应分析，结果可以作为分析桥梁结构地震响应时上部结构刚度的贡献，应用于矮塔斜拉桥的抗震概念设计。最后，对矮塔斜拉桥的整体稳定性能进行了有限元分析，并利用经验公式进行波纹钢腹板的剪切屈曲分析，结果表明波纹钢腹板组合箱梁矮塔斜拉桥具有足够的稳定性，不会发生任何形式的失稳。
[Abstract]:With the rapid development of long-span bridges in China, corrugated steel web box girder composite box girder cable-stayed bridge, a new type of bridge structure, with its light weight, low construction cost, Many advantages such as short construction period and good seismic performance have been widely used. This paper takes the corrugated steel web composite box girder cable-stayed bridge scheme of the main bridge of Sun Wu Yellow River Bridge as the prototype, combined with the application experience of the existing cable-stayed bridge with low tower. By establishing the finite element model, the static, dynamic and overall stability of the corrugated steel web composite box girder cable-stayed bridge with low tower is analyzed. The shear buckling strength of the corrugated steel web of the main girder is checked. This paper first introduces the structural form and mechanical characteristics of corrugated steel web composite box girder cable-stayed bridge with low tower, and expounds the research status of static, dynamic and stable performance of corrugated steel web composite box girder cable-stayed bridge with low tower. The finite element method is used to calculate the stress state of the structure of the corrugated steel web composite box girder cable-stayed bridge under the load in the construction stage, the completion stage and the operation stage. The results show that the structure is reasonable in force and has sufficient safety reserve. By establishing the bridge with no cable as a comparison, the stress state of the main beam and the cable under the moving load of the low tower cable-stayed bridge is analyzed. The results show that the load is mainly borne by the main beam, and the cable has no effect on the stress of the structure. In this paper, the finite element method is used to compare and analyze the dynamic characteristics of the cable-stayed bridge with low tower and the rigid frame-continuous composite beam bridge with equal span. The results show that the dynamic characteristics of the two bridges are similar. The linear response spectrum analysis method is used to analyze the seismic response of bridge structure. The results can be used as the contribution of the superstructure stiffness in the analysis of the seismic response of the bridge structure and can be applied to the seismic conceptual design of the cable-stayed bridge with low tower. Finally, the overall stability of the cable-stayed bridge with low tower is analyzed by finite element method, and the shear buckling of corrugated steel web is analyzed by empirical formula. The results show that the composite box girder with corrugated steel web has enough stability. There will not be any form of instability.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.27;U441

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