文档介绍：摘要1 洛河特大桥施工仿真分析学科:结构工程答辩日期: 作者姓名:校红波签名:导师姓名:简政签名:摘要山岭重丘区高等级公路跨越深沟峡谷时或特殊的引桥,经常会出现高桥墩与大跨度相结合的情况。特别是由于在总体设计上对公路平纵线形要求的不断提高,在一些特殊地形处,高桥墩与大跨度的结合成为不可避免。预应力混凝土连续梁和连续刚构桥是目前桥梁工程中应用最广泛的桥型,通常采用平衡悬臂方法施工。调查分析结果表明,桥梁结构施工期事故发生率比使用期高。这样,对桥梁的施工过程进行仿真模拟就显得尤为重要。论文以西部大通道包(头)北(海)线陕西境黄陵至延安段高速公路上的一座特大型桥梁-洛河特大桥-连续刚构桥为工程背景,结合施工应力监控探讨了预应力连续箱梁桥与高桥墩组合结构在悬臂施工过程中的应力分布。由于本座主桥上部结构采用双箱双室结构,主桥下部结构采用薄壁空心墩,桥跨度较大,墩身很高,结构型式复杂、预应力钢绞线线形复杂且数量很多,所以为求精确起见,分析中建立三维实体模型,采用实体力筋法的ANSYS处理过程,这种方法是基于有限元模型的处理。结合洛河特大桥施工控制方案,通过分析大桥在施工过程中箱梁和桥墩中的应力,及时掌握结构关键截面的应力,了解结构受力状况,确保施工期结构的安全并对施工监控提供参考。本论文的工作为洛河特大桥的施工建设提供了理论依据,为将要进行的施工监控提供了参考,也为桥梁今后的运营养护提供了初始数据,并积累了一定的科研资料。关键词:预应力混凝土桥梁、悬臂施工、高桥墩、三维实体模型Abstract 1 3D Finite Element Emulation Analysis on Luohe Huge Bridge Construction Subject:civil engineering author:Xiaohongbo Tutor:Jianzheng debate date:March,2005 AbstractHigh piers can often be observed,where high-class roads in heavy mountainous cross deep gorges or in case of the approach for extro-large bridge. Especially,since requirements for highway horizontal and vertical curves e more and more strict,the design for high pier is by no means avoided at some places with special topography. Pre-stressed concrete continuous beam and continuous concrete rigid frame bridge ,constructed through balanced cantilever, are the widest used in recent bridges. It can be drew from the investigation and analysis that the frequency of case while in construction is higher than while in usation. So, The emulation analysis of construction of bridges seems very important. With the Luohe huge Bridge as the engineering background , combining with the stress in construction surveillance and control, the stress distribution in construction of bining structure of pre-stressed concrete continuous beam and continuous concrete rigid frame bridge is studied in this paper. Since the double box and double room structure of upper structure 、the double thin-wall hollow pier of under structure、large span、high piers、 complex structure