土木工程交通土建工程方向专业毕业论文.doc

本科毕业设计（论文） 题 目：宁武高速公路宁德段A3合同段兰坪尾分离式立交上部结构内力计算宁德宁武高速公路工程A3合同段Abstract The box girder is a kind of sectional form adopted extensively in the bridge at present, there is fine structure that receives strength performance，but its loaded analyzing comparatively complicated．This paper outlines the development stage box girder bridge; then outlined the space bridge grillage method than the basic theory, the use of space grillage method for finite element analysis of box girder bridge; Has focused on the analysis of the accuracy of sorghum cell factors: study and use a real bridge Dr. concrete continuous box girder bridge analysis of the internal force carried out and safety checking. For complex continuous box girder with variable cross-section stress analysis of the structure to be carried out by Dr. Bridges spatial analysis. Ningde Ningwu paper to A3 highway project contract section of the end of continuous box girder bridges Lanping as the research object, the use of analysis of the bridge, Dr Bridge and security checking, focus on the use of spatial analysis grid box beam structure of the internal forces, the continuous case bridge section size, stress loss of priestesses steel beam, reinforcement, strength, fracture, and normal use of carrying capacity limit state safety limit state checking; the proposed division of space grillage method of checking to meet the continuous box girder bridge requirements for spatial analysis similar to the box girder bridge provides a reference, practical significance in engineering, but also further improve the box girder bridge analysis program basis. Keywords: Continuous box girder；Space grillage analysis method；Dr.bridge3.0目 录 1 绪论 1 1.1 箱梁桥概况 1 1.1 .1 箱形截面梁 1 1.2 空间梁格法 2 1.2.1 空间梁格法理论 3 1.2.2 建立梁格力学模型 3 1.3 影响箱梁梁格法分析精度的因素探讨 4 1.3.1 纵梁划分模式的影响 5 1.3.2 虚拟横梁间距的影响 6 1.3.3 对宽翼缘箱梁翼缘有效宽度的影响 6 1.3.4 虚拟纵梁的影响 7 1.3.5 剪切变形的影响 7 1.4 本文的研究内容和方法 7 2 斜弯桥在桥梁博士中设计计算 8 2.1 结构的离散 8 2.2 建立项目文件 8 2.3 总体信息输入 9 2.4 单元信息输入 10 2.5 钢束信息输入 11 2.6 施工信息输入