【土木】华公塘高架桥施工图设计

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编号:20171225115537342    类型:共享资源    大小:3.27MB    格式:RAR    上传时间:2017-12-25
  
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土木 华公塘 高架桥 施工图 设计
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摘要

华公塘高架桥施工图设计,本桥设计采用的是等截面预应力混凝土连续梁桥作为

桥型方案,本桥分为三跨,具体跨径为 30m+40+30m。设计过程如下:

根据本桥的具体资料,如地形,地质等,选择几个合理的桥型,根据桥型的美观,

安全以及耐久性等特点来选择最优的桥型方案。选定桥型方案之后,根据桥梁的相关的

具体规范,来进行截面尺寸拟定和跨径的布置。再根据桥面的具体宽度来进行车道的布

置等。再利用 Midas 软件来计算相关的内力,进而配置预应力钢筋。再进行截面各种特

性的验算。

本桥设计设计合理,验算通过。

关键词:方案比选;连续梁;施工图设计;验算目录

1 设计资料及构造布置·········································································1

1.1 技术标准········································································· 1

1.2 桥梁线性设计··································································· 1

1.3 材料规格········································································· 1

1.4 设计计算依据··································································· 2

1.5 通航水位·········································································· 2

1.6 基本计算数据··································································· 2

2 方案设计与比选··············································································· 5

2.1 工程概况·········································································· 5

2.2 方案设计·········································································· 5

2.3 方案比选与确定································································· 7

3 截面尺寸拟定·················································································· 8

3.1 设计特点及受力特点·························································· 8

3.2 结构尺寸拟定··································································· 8

3.3 毛截面几何特性计算·························································· 9

4 主梁作用效应计算···········································································11

4.1 结构自重效应计算····························································11

4.2 活载作用效应计算····························································15

4.3 内力组合计算··································································35

5 预应力钢束的估算及布置······························································· 51

5.1 计算原理········································································51

5.2 预应力筋估算结果····························································52

5.3 预应力筋的布置原则·························································58

5.4 调束以及预应力筋的布置结果············································ 58

6 预应力损失及有效预应力计算························································· 59

6.1 预应力损失计算·······························································59

华公塘高架桥施工图设计

7 截面强度验算···············································································69

7.1 正截面抗弯验算·······························································69

8 抗裂验算和持久状况构件的应力验算 ················································ 77

8.1 正截面抗裂·····································································77

8.2 正截面混凝土压应力验算···················································80

8.3 预应力钢筋拉应力验算······················································84

9 变形验算·····················································································86

9.1 主梁挠度验算··································································86

9.2 预拱度的设置··································································87

参考文献··················································································· 88

致谢························································································· 89

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