简支钢板组合梁桥合理截面构造研究

发布时间：2018-09-11 07:34

【摘要】：简支钢板梁桥因具有构造简单、强度高、自重轻、工厂化生产程度高、施工速度快等优点，在桥梁建设领域有着广泛的应用。在我国大力发展基础建设国情下，推动钢板组合梁桥的研究与应用，将有利于促进国民经济的发展，产生显著的经济和社会效益。因我国单位体系、桥梁荷载等级、规范的编制等与国外有许多不同点，导致了我国的简支组合梁桥在设计中有很大的独特性，不能完全照搬外国的经验与设计方案。为了研究钢板组合梁桥的合理截面构造，本文从数值理论分析与数值计算两个方面对这种组合梁进行了研究。本文的主要研究工作如下： 1．对简支工字形组合梁的抗弯曲、剪切及扭转承载力进行了分析，，总结了简支工字形组合梁构件的基本力学计算理论。所总结的方法可以用于简支工字形组合梁的结构设计计算。 2．推导了非组合钢板梁桥及活载组合梁桥合理梁高的计算公式，并应用所推导的计算公式进行了变桥宽、变主梁间距、变跨径等大量不同参数的实桥设计。得到了较多的规律和较好的设计指导经验。 3．基于合理截面构造设计的研究，建立了有限元计算模型对活载组合梁进行结构受力分析，结果表明活载组合梁在施工及正常使用状态下的应力及刚度均满足设计规范要求，并且有适当的材料强度储备，表明此活载组合梁的设计方法有较好的应用价值。
[Abstract]:Simply supported steel plate girder bridges are widely used in the field of bridge construction because of their advantages such as simple structure, high strength, light weight, high degree of factory production and fast construction speed. Under the condition of developing infrastructure construction vigorously in China, it is beneficial to promote the development of national economy and bring about remarkable economic and social benefits by promoting the research and application of steel plate composite girder bridge. Because there are many differences between our country's unit system, bridge load grade, code compilation and so on, which leads to the great uniqueness of our country's simply supported composite girder bridge in the design, we can not completely copy the experience and design scheme of foreign countries. In order to study the reasonable section construction of steel plate composite beam bridge, this paper studies this kind of composite beam from two aspects of numerical theory analysis and numerical calculation. The main work of this paper is as follows: 1. The flexural shear and torsional bearing capacity of simply supported I-shaped composite beams are analyzed and the basic mechanics calculation theory of simply supported I-shaped composite beams is summarized. The method can be used to design and calculate the structure of simple supported I-shaped composite beam. 2. The calculation formula of reasonable beam height of non-composite steel plate girder bridge and live load composite beam bridge is derived, and the width of the bridge is changed by using the derived calculation formula. A large number of real bridges with different parameters, such as variable main beam spacing and variable span, are designed. More rules and better design guidance experience are obtained. 3. Based on the research of reasonable section structure design, the finite element calculation model is established to analyze the structure force of live load composite beam. The results show that the stress and stiffness of the live load composite beam meet the requirements of the design code and have proper material strength reserve under the construction and normal service condition. It shows that the design method of the live load composite beam has good application value.
【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】：U442;U448.216

【参考文献】