GB/T51234-2017：城市轨道交通桥梁设计规范

GBT51234-2017······1

1 总则······11

2 术语······12

3 基本规定······13

3.1 区间高架桥梁布置······13

3.2 区间跨河桥梁布置······14

3.3 桥面布置······15

3.4 桥上线路······16

3.5 附属设施······16

3.6 桥梁景观······16

4 材料······18

4.1 混凝土······18

4.2 钢筋······18

4.3 钢材······21

5 设计荷载······24

5.1 荷载分类······24

5.2 荷载取值······25

5.3 荷载组合······32

6 刚度要求······34

7 结构设计······37

7.1 一般规定······37

7.2 混凝土结构······40

7.3 钢结构······42

7.4 钢棍凝土结合梁······47

7.5 构造要求······53

7.6 抗震设计规定······59

8 桥梁设备系统接口······61

8.1 轨道······61

8.2 供电······62

8.3 通信与信号及其他······62

9 耐久性设计及养护设施······63

9.1 耐久性设计······63

9.2 养护设施······65

附录A 混凝土截面的受扭塑性抵抗矩及抗扭强度计算······66

附录B 牛腿计算······70

附录C 桩基承台计算······73

附录D 正交异性桥面板疲劳强度验算······80

本规范用词说明······86

引用标准名录······87

附: 条文说明······89

1 总则······93

3 基本规定······95

3.1 区间高架桥梁布置······95

3.2 区间跨河桥梁布置······97

3.3 桥面布置······97

3.4 桥上线路······99

3.5 附属设施······100

3.6 桥梁景观······100

4 材料······101

4.1 混凝土······101

4.2 钢筋······101

4.3 钢材······102

5 设计荷载······104

5.1 荷载分类······104

5.2 荷载取值······104

5.3 荷载组合······111

6 刚度要求······112

7 结构设计······115

7.1 一般规定······115

7.2 混凝土结构······117

7.3 钢结构······121

7.4 钢-混凝土结合梁······123

7.5 构造要求······129

7.6 抗震设计规定······131

8 桥梁设备系统接口······134

8.1 轨道······134

8.2 供电······135

9 耐久性设计及养护设施······136

9.1 耐久性设计······136

9.2 养护设施······137