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and calculation. according to some external factors, first protocol the span and the height of the main bridge, confirm the arch axis coefficient, figure out the elastic center and the elastic coefficient, check out the internal force of the dead load and live load’s vault , and the internal force of the one fourth section and the arch springing, then calculate the internal force of the temperature and concrete shrinkage, last, check the strength and the stability of the main arch ring and shear calculate the arch foot section.
key words: arch bridge, constant section,catenary,the main arch
目 录
摘
要 ....................................................................... 1
abstrct ...................................................................... 2
目
录 ....................................................................... 3
1 工程概况及使用求 ........................................................ 6
1.1 工程况 .............................................................. 6
1.2使用求 ............................................................... 6
1.3设计依据及参书 ....................................................... 7
2 方案选 .................................................................. 7
2.1 方案择 .............................................................. 9
3 桥梁要概要考比选设
计 ................................................................. 10
3.1方案简介及上部结构尺寸拟定 ............................................ 10
3.2主要尺寸 ............................................................... 1
3.2.1设计资料 ............................................ 错误！未定义书签。
3.2.2主拱圈几何要素计算 .................................. 错误！未定义书签。
3.2.3确定拱轴系数 ........................................ 错误！未定义书签。
3.2.4不计弹性压缩的拱自重水平推力 ........................................ 12
3.2.5弹性中心位置、弹性压缩系数和拱自重弹性压缩水平推力 ................... 14
3.2.6自重效应 ............................................................ 14
3.2.7公路ⅱ级汽车荷载应 ................................................ 15
3.2.8温度作用和混凝土收缩应 ............................................ 15
4 配筋算 ................................................................ 23
4.1防撞护栏配筋算 ...................................................... 23
4.2桥面板配筋算 ........................................................ 23
4.2.1构造
置 ............................................................ 24
4.2.2 配
算 ............................................................. 25
4.3盖梁配筋算 .......................................................... 35
4.4拱上立柱配筋算 ...................................................... 36
效
效
计
计
计
布
筋
计
计