混凝土结构设计.doc

目录
设计资料················································ 2
1 道碴槽板的设计······································· 3
结构形式及基本尺寸······································· 3
荷载与内力··············································· 3
恒载·············································· 3
活载·············································· 4
活载组合·········································· 5
内力组合·········································· 6
道碴槽板的设计与检算····································· 7
板厚检算·········································· 7
配筋及检算········································ 8
混凝土压应力、钢筋拉应力及混凝土拉应力检算
········ 8
裂缝宽度检算······································10
2 主梁的设计···········································12
结构形式及基本尺寸·······································12
荷载与内力···············································12
恒载及恒载内力计算································12
活载及其内力计算··································13
内力组合··········································15
梁的设计与检算···········································16
跨中钢筋设计及检算································16
主拉应力的检算····································18
剪应力计算及剪应力图······························19
箍筋设计··········································20
斜筋设计··········································20
弯矩包络图与材料图································21
跨中截面裂缝宽度计算······························21
跨中截面挠度计算··································22
参考文献·················································23
附图
设计资料
1 结构形式及基本尺寸
采用分片形式T形截面
梁梗中心距
道碴槽宽
每片梁顶宽
计算跨度
梁全长
梁高
跨中腹板厚
180cm
390cm
192cm
1600cm
1650cm
190cm
30cm
2 桥上线路与人行道
桥上线路为平坡、直线、单线线路,道碴桥面;设双侧带栏杆的人行道。
3 材料
混凝土:250号
钢筋:T20MnSi及A3。板内:受力钢筋;分布钢筋。梁内:纵向受力钢筋;箍筋及纵向水平钢筋,架立钢筋。
4 荷载
活载:列车活载:中—活载;
人行道活载:;
;
恒载:;
;
道碴及线路设备重10kPa;
道碴槽板及梁体自重,按容重25计算。
板重可近似按平均厚度计算