钢筋混凝土简支T形梁桥设计计算书设计书

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1、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················································53.1主梁几何特性计算··········································53.2恒载内力计算·························

2、·····················63.3荷载横向分布计算··········································73.4活载内力计算··············································93.5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·······················154.1配置主梁受力钢筋············

3、·····························154.2截面承载能力极限状态计算·································174.3斜截面抗剪承载能力计算···································174.4箍筋设计·················································204.5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

4、度和挠度验算·····················225.1裂缝宽度验算·············································225.2挠度验算·················································23第六章结论·······················································25附录··················································

5、······25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：20m2．计算跨径：19.6m3．主梁预制长度：19.96m4.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）

6、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：3.5KN/m26．结构重要性系数：1.17．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、人行道跨径，混凝土为C35。　　　　　　　　表1 钢筋技术指标种类弹性模量（MPa）抗拉设计强度（Mpa）抗压设计强度（Mpa）标准强度（Mpa）R235195195235HRB335级28028

7、0335　　　　　　　　表2混凝土技术指标种类设计强度标准强度弹性模量(MPa)轴心抗压(MPa)轴心抗拉(MPa)轴心抗压(MPa)轴心抗拉(MPa)C3013.81.3920.12.013.00×104C3516.11.5223.42.203.15×104258、设计依据25　　　（1）交通部.公路桥涵设计通用规范(JTGD60-2004)；北京：人民交通出版社.2004　　　（2）交通部.公路钢筋混凝土及预应力混凝土桥涵设计规范（JTGD62－2004），北京：人民交通出版社.20049、计算方法：极限

8、状态法。10、桥面铺装：9cm砼桥面铺装（容重23kN/m3）+3cm沥青防水层（容重21kN/m3），人行道和栏杆自重线密度按照单侧6kN/m。11、参考结构尺寸（设计尺寸根据要求自己拟定）　　　　　图1为20m跨径，桥宽净9+1×1m人行道的参考尺寸。第二章行车道板内力计算、配筋及验算（悬臂板、连续单向板）2.1永久荷载及其效应悬臂板1.每延米板上的横载ｇ沥青混凝土层面：ｇ１＝0.03×1.0×