i 目 录 第一章 概 述 ................................................................................................................................. 1 第二章 结构分析主要结论 ............................................................................................................. 2 一、设计参数取值 ................................................................................................................... 2 二、立柱支座 ........................................................................................................................... 2 三、主拱圈局部应力 ............................................................................................................... 3 四、桁架节点疲劳 ................................................................................................................... 6 五、考虑规范允许的施工偏差等因素 ................................................................................... 9 第三章 结构构造 ........................................................................................................................... 11 一、拱肋横隔板过焊孔设置 ................................................................................................. 11 二、拱肋横隔板的顶紧连接 ................................................................................................. 11 三、板厚示意 ......................................................................................................................... 12 四、拱桁预拱度 ..................................................................................................................... 12 第四章 材料及施工工艺 ............................................................................................................... 13 一、材料 ................................................................................................................................. 13 （一）桥梁用结构钢标准 ............................
