毕业论文---高速公路(64+2×113+64)m连续梁桥设计.doc

西 南 交 通 大 学 本 科 毕 业 设 计 高速公路(64+2×113+64)m 连续梁桥设计  摘 要 本设计为＋×113+64）m公路预应力混凝土连续桥设计，边跨采用满堂支架就地浇筑施工法，合龙方案为先边合龙再中合龙 本设计主要采用分析软件来进行结构内力分析计算，期间也用了Autocad 和Excel进行辅助设计。全桥上部结构共分为个梁单元，定义有个施工阶段 本设计的顺序是在CAD中画好各个截面，导入桥梁博士完成桥梁建模。并把每个毛截面的特性和内力以文本的形式输出。对荷载进行简单组合，把自重内力与移动活载内力进行组合用来初步估算纵向预应力钢筋束量。运行桥梁博士数据计算，根据估算的预应力钢筋束在桥梁博士中调束，最后以文本的形式输出桥梁的预应力损失和各个次内力的数据。最后进行运营结构验算，包括主力组合、附加力组合和抗裂组合。承载能力极限验算包括主力组合和主力+附加力组合，要确保每种组合应力不超过容许值，设计才能通过。 关键词：预应力混凝土；梁桥；悬臂施工Abstract The design for the (64 +2 × 113 +64) m highway prestressed concrete continuous beam bridge design , this highway bridge is a single room, three -lane , four-span continuous girder highway bridges . Deck width 12.75m, bridge bottom width 7m. Bearing beam at a height of 7m, the span at mid is 3m, by 1.6 times parabola ; the plane at back thickness at the support of 0.8m, cross for 0.4m, thickness varies linearly ; web thickness bearing at 0.7m, span at 0.4m, linear. Bridge axis is a straight line, using a 2% cross slope design, do not set the longitudinal slope . Design load for the highway - Ⅰ . Cradle cantilever beam with symmetrical main construction , side -situ pouring across adopt Trestle construction method , closure plan for the closure and then the first side closure . This design uses Dr. Bridges 3.0 analysis software for structural analysis and calculation of internal forces , also used during the Autocad and Excel aided design . Ministry of full bridge girder structure is divided into 112 units , there are 51 definitions construction phase . The design is in the order of the CAD drawing the various sections, the import is completed , Dr. bridge bridge modeling . And the characteristics and internal forces the output of each section of the hair in the form of text. For simple load combination , the weight of internal forces and moving live load force combined to preliminary estimates the amount of longitudinal prestressing tendons . Dr. Run bridge data calculation , based on estimates of pres