摘要本次的设计对象是主跨105的系杆拱桥。本桥桥址地处平均海拔40米的地区，桥轴线与水流方向基本垂直，两岸间间距约150左右，根据此桥地址地形条件以及规范要求，采用下承式钢管混凝土系杆拱桥，跨径105m，桥面宽19m，采用公路一级，双向两车道；系梁高2。2m，横梁高1。25m。本计算书主要论述了该桥梁的设计和计算过程。首先查询该桥地质条件和最新的桥梁公路设计规范，然后进行方案比选阶段，对主桥进行整体布置设计，对上部结构进行内力计算。整个计算过程在桥梁博士上进行，首先进行桥型的建模，然后钢束及施工阶段的输入，电算完成后在此计算书上进行强度应力验算。本设计严格遵循交通部颁布实施的各种公路桥梁规范，最终完成此项设计。87610

毕业论文关键词  钢管混凝土  系梁  拱桥  预应力  钢束

毕业设计说明书外文摘要

Title      Reinforced concrete tied arch bridge of 105m main span                                           

Abstract The object of this design is the 105 Main Span tied arch bridge。 The Bridge site is located in an average altitude of 40 meters area,where substantially perpendicular to the bridge axis and the direction of flow, the spacing between the two sides about 150 or so。 According to the requirements of the bridge site topographic conditions and specifications, the bearing type steel pipe concrete tied arch bridge, the span of 105m, deck wide 19m by highway level, two lane; tie beam of 2。2m high, beam and high of 1。25m。 This statement mainly discusses the design and calculation process of the bridge First i query the geological conditions of the bridge and the new highway bridge design code, and then carry out a scheme comparison and selection phase, the bridge of the overall layout design and on the upper part of the structure internal force calculation。 The whole calculation process in doctor bridge, first carries on the bridge modeling and steel beam and construction phase of the input, computerized after the completion of this statement on strength stress calculation。This design strictly follows the traffic department issued the implementation of various highway bridge specifications, and finally completed the design。From+优|尔-论_文W网wWw.YouErw.com 加QQ752018.766

Keywords  concrete filled steel tube  tie beam  arch bridge  prestressed  steel beam   

目   次

1  引言 1

2  设计资料及概述  2

2。1  技术标准 2

2。2  自然概况 2

2。3  设计规范 2

3  方案设计与比选 3

3。1  初选设计方案说明  3             

3。2  方案比选3

3。3  推荐桥型方案 13

4  桥梁内力计算 17

4。1  计算模式17

4。2  设计荷载及荷载组合21

4。3  桥梁截面内力计算22

5  预应力钢束的计算30

5。1  钢束估算30

5。2  预应力损失及有效预应力计算31

6  系梁截面强度验算33

7  系梁正截面抗裂验算35

8  持久状况构建的应力验算41

8。1  系梁正截面混凝土压应力验算41

8。2  拱肋压应力验算46

8。3  系梁斜截面混凝土主压应力验算51

8。4  拱肋主压应力验算53

8。5  验算阶段计算施工工况56

9  施工阶段说明58

9。1  施工安排58

9。2  主桥上部结构施工58