简支转连续引桥上部结构_毕业设计.doc

简支转连续桂江大桥 毕业设计（论文） 摘要 桂江大桥位于佛山市南海区，单幅宽10m，五跨等跨径为25m，全长100m。桂江大桥简支转连续箱梁结构总体的设计，需要理解桥梁体系的转换，采用Midas软件进建立模型。设计主要内容有：恒载和活载计算，估算配筋面积，配置预应力钢束；计算细部结构的受力状况；划分各个施工阶段，对每个施工阶段进行结构安全的受力计算和分析；使用阶段进行结构永久荷载、活荷载、预应力和附加应力的计算和结构合理性的分析；承载能力极限状态和正常使用极限状态的截面验算，作出包罗图；根据上部结构的计算结果对下部结构进行设计。设计难点有：预应力的张拉控制和施工阶段的加载。 关键词：简支转连续，预应力连续箱型梁，Midas软件，预应力钢束，施工阶段，恒载，活载，应力组合，包络图，截面验算。 Abstract  Guijiang Bridge is located in Guangdong Province, is a Two-yong highway overpass, a single width of 10m, total length of 100m. Banyan Bridge simply supported T beam continuous overall design, need to understand the conversion of the bridge system, the use of Bridge Doctor software into the model. Design elements include: dead load and live load calculations, estimates reinforcement size, configuration prestressed steel beam, calculate detailed structure of the stress state; by each construction stage, construction stage of the structural safety of each of the force calculation and analysis ; with stage structure, permanent loads,live loads, prestressed and additional stress calculations and structural analysis of reasonableness; ultimate limit state and limit state sectional checking; structure calculation based on the results of the upper structure of the lower part of the design. Design challenge are: pre-stress tension control and construction phase of the load. I simplified the design, construction, total construction phase 3, calculation is simple. Key words: simply supported continuous prestressed T-beam Bridge Doctor, prestressed steel beams, construction stage, dead load, live load, stress combination, envelope, cross checking.  目录 前言 - 10 - 第一章 工程概况 - 11 - 1.1 设计基本概况 - 11 - 1.1.1 桥梁线型布置 - 11 - 1.1.2 主要技术标准 - 11 - 1.1.3 主要材料 - 11 - 1.1.4 桥面铺装 - 12 - 1.1.5 桥面排水 - 12 - 1.1.6 施工方式 - 12 - 1.1.7 设计依据 - 12 - 1.1.8 支座强迫位移 - 13 - 1.1.9 温度影响 - 13 - 1.2 桥型及纵、横断面布置 - 13 - 1.2.1 桥型布置及孔径划分 - 13 - 1.2.2 截面形式及截面尺寸拟定 - 13 - 1.2.3 箱梁底板厚度及腹板宽度设置 - 15 - 1.3 毛截面几何特性计算 - 17 - 1.4截面效率指标 - 17 - 第二章 桥面板设计 - 18 - 2.