钢筋混凝土简支T形梁桥设计计算书设计书

目录

第一章 基本设计资料·················································1 第二章 行车道板内力计算、配筋及验算································2 第三章 主梁内力计算················································5 3.1主梁几何特性计算··········································5 3.2恒载内力计算··············································6 3.3荷载横向分布计算··········································7 3.4活载内力计算··············································9 3.5主梁内力计算·············································14 第四章 承载力极限状态下截面设计、配筋与计算·······················15 4.1配置主梁受力钢筋·········································15 4.2截面承载能力极限状态计算·································17 4.3斜截面抗剪承载能力计算···································17 4.4箍筋设计·················································20 4.5斜截面抗剪承载能力设计···································21 第五章 正常使用极限状态下的裂缝宽度和挠度验算·····················22 5.1裂缝宽度验算·············································22 5.2挠度验算·················································23 第六章 结论·······················································25 附录························································25

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钢筋混凝土简支T形梁桥设计计算书

第一章 基本设计资料

1．桥梁跨径：20 m 2．计算跨径：19.6 m 3．主梁预制长度：19.96 m

4.主梁结构尺寸拟定：5片；设置5根横隔梁。 （1）主梁梁肋间距：

跨径L=20m，主梁间距为2.25m； 所有跨径两侧人行道宽均为0.75m。 （2）主梁高度：1.68m。

（3）梁肋厚度：本次课程设计规定，跨中稍薄一些，取180mm，在梁肋端部2.0到5.0m范围内可逐渐加宽至靠近端部稍厚一些350mm。 （4）桥面板：4.9×2.25.

（5）桥面横坡：桥面横坡采用在桥面板上做铺设不等厚的铺装层，桥面横坡为1.5%。

5．设计荷载 ：公路-Ⅰ级

人群荷载：3.5 KN/m2 6．结构重要性系数： 1.1

7．材料：（1）钢筋，主钢筋采用HRB335，其它钢筋采用R235。其技术指标见表1；

（2）混凝土及其技术指标见表2，T形主梁、桥面铺装，栏杆、人行道

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跨径l?20m，混凝土为C35。 表1 钢筋技术指标

弹性模量种类 （MPa） R235 HRB335级 280 280 335 （Mpa） 195 度（Mpa） 195 （Mpa） 235 抗拉设计强度抗压设计强标准强度 表2 混凝土技术指标 种 类 设计强度 轴心抗压 (MPa) C30 C35 8、设计依据

13.8 16.1 拉(MPa) 1.39 1.52 (MPa) 20.1 23.4 (MPa) 2.01 2.20 3.00×104 3.15×104 轴心抗标准强度 轴心抗压轴心抗拉 弹性模量(MPa) .. ..