土木工程交通土建工程方向专业毕业论文.doc

PAGE 4 PAGE 1 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 专 业： 土木工程（交通土建工程方向） 摘 要 箱形截面梁是目前桥梁中广泛采用的一种截面形式，具有优良的结构受力性能，但其受力分析则较为复杂。本文首先简述了现阶段箱梁桥发展；然后简述了空间梁格法的基本理论，采用空间梁格法对箱梁桥进行有限元分析；又着重探讨了影响梁格法分析精度的因素：学习和使用桥梁博士对一座实际的混凝土连续箱梁桥进行了结构内力分析研究及安全验算。 对于复杂的变截面连续箱梁的应力分析，需通过桥梁博士对结构进行空间分析。文中以宁德宁武高速公路工程A3合同段兰坪尾连续箱梁桥为研究对象，采用桥梁博士对桥梁进行分析以及安全验算，重点研究了采用空间梁格法分析箱梁结构内力，对连续箱梁桥截面尺寸、预应力钢束应力损失、配筋、强度、裂缝以及承载力极限状态和正常使用极限状态进行安全验算；本文提出的空间梁格划分的计算方法对连续箱梁桥的验算满足要求，为类似的箱梁桥空间分析提供了参考，具有工程实际意义，也为进一步完善箱梁桥结构分析程序奠定了基础。 关键字：连续箱梁；空间梁格法；桥梁博士 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 al