毕业论文-18+40×3+18米五跨连续梁桥设计.doc

18+40×3+18米五跨连续梁桥设计 18+40×3+18米五跨连续梁桥设计 PAGE 4 PAGE 5 本科毕业设计 土木工程 18+40×3+18米五跨连续梁桥设计 Design of a 18+40×3+18 meters long 5-span continuous girder bridge 18+40×3+18米五跨连续梁桥设计 摘要：本设计桥梁跨度为18+40x3+18米，采用单箱双室，单向双车道，采用先简支后连续施工。利用已给的各项资料，通过分析桥梁结构在使用过程中的恒载及活载作用，考虑不同的荷载安全系数进行荷载组合，将极限状态的两种内力组合结果作为估算钢束的计算内力。估算出各截面的钢束后，按照一定要求将钢束布置好，重新模拟施工并考虑预应力作用，进行作用的第二次组合，以进行施工及使用过程中的截面强度验算、应力验算及变形验算。各项验算均满足要求且设计合理，则设计通过。为提高设计效率及准确度，设计中我采用桥梁博士软件进行计算，并充分利用了CAD、WORD、EXCEL等办公软件来整理设计文件。 关键词：箱梁；预应力；先简支后连续梁桥 Design of a 18+40×3+18meters long 5-span continuous girder bridge Abstract :The spans of the bridge are 18+40×3+18m, each suit has one box two rooms and two traffic ways.With the data given, through analyzing internal force of the dead loads and live loads at the stage of using and considering the different safety factor of the force I calculate the design value of combination for action effects of the limit states and estimate the area of steel of the bridge. As the steel is assigned reasonably, we should imitate the construction process secondly and consider the affect of the pre-stressed steel, then calculate the combined force of the limited condition again, which is for checking the force of the construction stage and the using stage. If the force can meet the need and the design is reasonable then the design is advisable. During the process of the design I make good use of the software such as DOCTORBRIGE、CAD、WORD and EXCELL to optimize my design. Keywords：girder box ; prestressing force ; simple supported-to-continuous girder bridge 目　录TOC \o 1-3 \h \u HYPERLINK \l _Toc19518 1 设计基本资料 PAGEREF _Toc19518 1 HYPERLINK \l _Toc10629 1.1 桥梁线形布置 PAGEREF _Toc10629 1 HYPERLINK \l _Toc9146 1.2 设计标准 PAGEREF _Toc9146 1 HYPERLINK \l _Toc14639 1.3 主要材料 PAGEREF _Toc14639 2 HYPERLINK \l _Toc32255 1.4 设计计算依据 PAGEREF _Toc32255 2 HYPERLINK \l _Toc11187 1.5 基本计算数据 PAGEREF _Toc11187 3 HYPERLINK \l _Toc19230 2 设计要点及结构尺寸拟定 PAGEREF _Toc19230 5 HYPERLINK \l _Toc23668 2.1 设计要点 PAGEREF _Toc2366