论文总字数：40920字

江苏阜宁串场河大桥

方案-C

学生姓名： 陶正阳

学 号： 1801100225

学 院： 土木工程学院

专 业： 土木工程

指导教师： 张南

2014年 05月

目录

第一章 工程概述··································5

第二章 设计资料··································5

2.1主要技术指标······························5

2.2设计依据··································5

2.3材料规格··································5

第三章 主梁截面形式及细部尺寸的拟定··············6

3.1方案选择··································6

3.2上部结构··································7

3.3截面特性值································10

1. 荷载内力的计算····························10

4.1横载内力··································11

4.2活载内力··································15

1. 次内力组合································24

5.1温度次内力计算····························24

5.2支座沉降次内力计算························30

1. 内力组合和内力包络图······················32

6.1短期效应组合······························32

6.2长期组合··································33

6.3基本组合··································34

6.4包络图····································35

1. 预应力筋的计算与布置······················38

7.1原理与方法································38

7.2预应力筋的布置····························39

7.3钢束布置··································43

1. 净截面以及换算截面几何特性的计算··········48

8.1概述······································48

8.2净截面几何性质计算························48

8.3换算截面几何性质计算······················50

1. 预应力损失及有效预应力的计算··············51

9.1控制应力及有关参数计算····················51

9.2摩擦损失计算······························52

9.3锚具回缩损失计算··························55

9.4弹性压缩损失计算··························58

9.5应力松弛损失计算··························59

9.6收缩徐变损失计算··························59

9.7预应力损失总和及有效预应力计算············61

1. 承载能力极限状态验算······················62

10.1正截面承载力验算·························62

10.2斜截面抗剪承载力验算·····················64

1. 正常使用极限状态验算····················65

11.1抗裂验算·································65

1. 持久状况和短暂状况应力验算··············67

12.1持久状况界面混凝土法向应力计算···········67

12.2短暂状态应力验算·························68

第十三章 墩及桩基础设计与计算····················69

13.1支座·····································69

13.2墩身设计与验算···························70

13.3承台设计·································73

13.4桩基础设计·······························73

参考文献·········································76

致谢·············································77

1. ：工程概述

本设计是根据设计任务书的要求和《公路桥规》的规定,对江苏阜宁串场河大桥进行设计。连续梁桥是工程上广泛使用的一种桥型,它不但具有可靠的强度,刚度及抗裂性,而且具有行车舒适平稳,养护工作量小,设计及施工经验成熟的特点。设计一座梁桥必须从桥跨布设,尺寸拟定,钢束布置以及施工方法等方面综合考虑,还要充分考虑设计参数和环境影响。

关键字：连续梁桥、设计、施工

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