钢箱梁桥毕业设计

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钢箱梁桥毕业设计

篇一:桥梁工程毕业设计正文【钢箱梁桥】

目录

1.绪论 ................................................ ................................................... . (3)

2.设计概述 ................................................ ................................................... .. (4)

2.1桥孔布置 ................................................ ................................................... .. (5)

2.2 截面尺寸及拟定 ................................................ ................................................... (5)

2.2.3箱梁面板厚度设置 ................................................ ....................................................

6

2.2.4箱梁腹板宽度设置 ................................................ . (7)

3.主梁截面几何特性计算 ................................................ ................................................... (7)

4.主梁内力计算 ................................................ ................................................... . (8)

4.1恒载内力计算 ................................................ ................................................... . (8)

4.1.1一期恒载内力 ................................................ ................................................... . (9)

4.1.2二期恒载内

................................................... .. (10)

4.1.3总恒载内力 ................................................ ................................................... (11)

4.2活载内力计算 ................................................ ................................................... .. (12)

4.2.1横向分布系数的计算 ................................................ . (12)

4.2.2主梁内力影响线及加载 ................................................ (13)

4.3内力组合 ................................................ ................................................... . (20)

4.3.1承载能力极限状

..................................................

20

5.第二体系的计算 ................................................ ................................................... . (21)

5.1桥面板的局部应力计算 ................................................ ....................................................

21

5.2截面几何特征值的计算 ................................................ ...................................................

22

5.3纵横肋的弯矩计算 ................................................ ................................................... .. (26)

5.3.1活载的弯矩计算 ................................................ ....................................................

26

5.3.2恒载的弯矩计算 ................................................ ....................................................

27

5.3.3 横肋弹性变形附加弯矩计算 ................................................ .. (28)

5.4纵肋截面的应力计算 ................................................ ................................................... . (30)

6.应力检算 ................................................ ................................................... (31)

小结 ................................................ ................................................... (33)

参考文献 ................................................

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