波形钢腹板PC组合箱梁腹板稳定性研究
发布时间：2019-01-28 07:36
【摘要】：波形钢腹板组合箱梁桥是一种将混凝土与钢板有效结合起来的新桥型，因结构轻型美观、受力明确等长处，显得应用前景非常良好。限于目前国内研究应用较少，所以设计施工水平有待进一步的提高。在分析总结了前人相关研究成果和国内外各种施工设计相关规范的基础上，本文通过ANSYS分析计算和理论经验公式的分析，研究了波形钢腹板组合箱梁桥的腹板稳定性问题。主要完成工作如下： 一、本文先回顾了波形钢腹板的发展和应用历程，并梳理了波形钢腹板的稳定性计算基础理论公式，分别从波形钢腹板局部屈曲强度计算、整体屈曲强度计算和合成屈曲强度计算三个方面进行阐述，总结了在线弹性情况和非线性情况下的经验计算公式，，并用不同算例进行计算比较，得出各主要计算公式计算精度的差异。 二、本文在理论公式计算的基础上，利用ANSYS建立波形钢腹板箱梁的空间模型，在线弹性情况下进行了特征值屈曲分析，模型尺寸参考兰州市雁白黄河大桥和其它已建桥梁尺寸，建立模型分析了波形钢腹板板厚、波高、波折角度、直板长度、腹板高度和横隔板间距变化对其屈曲模态和屈曲极限荷载的影响，并分析总结其规律，与理论值进行比较。 三、本文在特征值屈曲分析的前提下，继续利用ANSYS非线性屈曲分析功能，计入波形钢腹板的初始几何缺陷、材料塑性、几何非线性和大变形效应等，用弧长法对波形钢腹板箱梁桥的腹板进行了全程屈曲响应分析。在非线弹性情况下对波形钢腹板的主要几何构造参数和横隔板间距变化对其屈曲模态和屈曲极限荷载的影响进行研究与分析，总结其变化规律，并对屈曲后性能也进行了分析研究和评价。 四、对线弹性分析结果和非线性分析结果进行分析比较，并结合理论公式分析比较得出线弹性和非线性计算结果的差别。 本文通过对波形钢腹板组合箱梁桥的腹板稳定性进行了线弹性和非线性分析研究，分析了不同几何构造尺寸时腹板屈曲后性能的差异，希望能为同类型桥梁的设计和施工提供一定的理论参考。
[Abstract]:The corrugated steel web composite box girder bridge is a new type of bridge which combines concrete and steel plate effectively. Because of the advantages of light and beautiful structure and clear force, the application prospect is very good. Limited to domestic research and application, so the level of design and construction needs to be further improved. Based on the analysis and summary of previous research results and various construction design codes at home and abroad, this paper studies the web stability of composite box girder bridges with corrugated steel webs by means of ANSYS analysis and theoretical empirical formula analysis. The main works are as follows: firstly, the development and application of the corrugated steel web are reviewed, and the basic theoretical formulas for the stability calculation of the corrugated steel web are presented. The local buckling strength of the corrugated steel web is calculated respectively. Three aspects of global buckling strength calculation and composite buckling strength calculation are described. The empirical formulas for on-line elastic and nonlinear cases are summarized and compared with different examples. The difference of calculation accuracy between the main formulas is obtained. Secondly, on the basis of theoretical formula calculation, the spatial model of corrugated steel web box girder is established by using ANSYS, and the eigenvalue buckling analysis is carried out under the condition of on-line elasticity. The model size refers to the dimensions of Yanbai Yellow River Bridge and other bridges that have been built in Lanzhou City. The influence of the thickness of corrugated steel web plate, wave height, corrugated angle, length of straight plate, the height of web plate and the spacing of transverse spacer on the buckling mode and ultimate buckling load are analyzed and summarized, and compared with the theoretical values. Thirdly, on the premise of eigenvalue buckling analysis, the ANSYS nonlinear buckling analysis function is used to take into account the initial geometric defects, material plasticity, geometric nonlinearity and large deformation effects of corrugated steel web. The buckling response of the web of the corrugated steel web box girder bridge is analyzed by arc length method. In the case of non-linear elasticity, the effects of the main geometric construction parameters and the spacing of transverse spacers on the buckling modes and ultimate buckling loads of corrugated steel web are studied and analyzed, and the variation rules are summarized. The post-buckling performance is also analyzed and evaluated. Fourthly, the results of linear elastic analysis and nonlinear analysis are analyzed and compared, and the difference between linear elasticity and nonlinear calculation results is obtained by combining theoretical formula analysis. In this paper, the linear elastic and nonlinear analysis of web stability of corrugated steel web composite box girder bridge is carried out, and the difference of web buckling performance with different geometric dimensions is analyzed. Hope to provide some theoretical reference for the design and construction of the same type of bridge.
【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U441;U448.213
本文编号：2416841
[Abstract]:The corrugated steel web composite box girder bridge is a new type of bridge which combines concrete and steel plate effectively. Because of the advantages of light and beautiful structure and clear force, the application prospect is very good. Limited to domestic research and application, so the level of design and construction needs to be further improved. Based on the analysis and summary of previous research results and various construction design codes at home and abroad, this paper studies the web stability of composite box girder bridges with corrugated steel webs by means of ANSYS analysis and theoretical empirical formula analysis. The main works are as follows: firstly, the development and application of the corrugated steel web are reviewed, and the basic theoretical formulas for the stability calculation of the corrugated steel web are presented. The local buckling strength of the corrugated steel web is calculated respectively. Three aspects of global buckling strength calculation and composite buckling strength calculation are described. The empirical formulas for on-line elastic and nonlinear cases are summarized and compared with different examples. The difference of calculation accuracy between the main formulas is obtained. Secondly, on the basis of theoretical formula calculation, the spatial model of corrugated steel web box girder is established by using ANSYS, and the eigenvalue buckling analysis is carried out under the condition of on-line elasticity. The model size refers to the dimensions of Yanbai Yellow River Bridge and other bridges that have been built in Lanzhou City. The influence of the thickness of corrugated steel web plate, wave height, corrugated angle, length of straight plate, the height of web plate and the spacing of transverse spacer on the buckling mode and ultimate buckling load are analyzed and summarized, and compared with the theoretical values. Thirdly, on the premise of eigenvalue buckling analysis, the ANSYS nonlinear buckling analysis function is used to take into account the initial geometric defects, material plasticity, geometric nonlinearity and large deformation effects of corrugated steel web. The buckling response of the web of the corrugated steel web box girder bridge is analyzed by arc length method. In the case of non-linear elasticity, the effects of the main geometric construction parameters and the spacing of transverse spacers on the buckling modes and ultimate buckling loads of corrugated steel web are studied and analyzed, and the variation rules are summarized. The post-buckling performance is also analyzed and evaluated. Fourthly, the results of linear elastic analysis and nonlinear analysis are analyzed and compared, and the difference between linear elasticity and nonlinear calculation results is obtained by combining theoretical formula analysis. In this paper, the linear elastic and nonlinear analysis of web stability of corrugated steel web composite box girder bridge is carried out, and the difference of web buckling performance with different geometric dimensions is analyzed. Hope to provide some theoretical reference for the design and construction of the same type of bridge.
【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U441;U448.213
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