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前言此次毕业设计是为了应用型本科人才的培养需要，是对应用型本科人才对所学知识的一个检验。本设计根据桥梁的地理环境和周围的环境状况，以及对于经济方面的要求，最终选定的桥型为预应力连续梁桥。通过在预制场预制主梁，在桥位定位安装。35312
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预应力混凝土连续梁桥以结构受力性能好、变形小、行车平顺舒适、造型简洁美观、养护费用少、抗震能力强等。预应力混凝土桥仍是最富有竞争力的主要桥型之一。我国的预应力混凝土结构起步虽然比较晚，但是由于随着我国综合国力的发展，近年来得到了飞速发展。现在，我国已然成为了世界上的桥梁大国，这也是我国的综合实力的体现。预应力混凝土桥主要是受弯构件，即要承受足够的弯矩，又要充分节省材料节省造价。
虽然预应力混凝土桥梁的发展还不到80年。但是，在桥梁结构中，随着预应力理论的不断成熟和实践的不断发展，预应力混凝土桥梁结构的运用必将越来越广泛。
preface The graduation design is for the cultivation of applied undergraduate talents need, is the applied undergraduate talents with knowledge in a test.
This design according to the geographical environment of the bridge and the surrounding environment, as well as to the requirement of the economy, eventually selected bridge for prestressed concrete continuous girder bridge. Through the prefabricated precast girder, installed in the bridge location.
Prestressed concrete continuous girder bridge with structure stress performance good, small deformation, driving smooth and comfortable, beautiful modelling concise, less maintenance costs, the seismic ability, etc. Prestressed concrete bridge is still the most competitive one of the main bridge.Although of prestressed concrete structures in China started relatively late, but as with the development of China's comprehensive national strength, obtained the rapid development in recent years. Now, our country has become the power of the bridge in the world, this also is the embodiment of the comprehensive strength of ourcountry.Prestressed concrete bridge is primarily a flexural member, that is, to the bending moment, enough to fully save material to save cost.
Although the development of prestressed concrete bridge is less than 80. But, in the bridge structure, with the mature of the theory of prestressed and practice of development, the use of prestressed concrete bridge structure will be more and more widely.
一、绪论 1
1.1 预应力混凝土连续梁桥概述： 1
1.2毕业设计的目的与意义： 3
二、基本信息 4
2.1 工程概况 4
2.2 技术标准 4
2.3 主要规范 5
2.4 结构概述 5
2.5 主要材料及材料性能 6
2.6 计算原则、内容及控制标准 8
三、桥梁横截面设计 8
3.1 桥梁跨中横断面 8
3.2主梁截面 10
3.3 截面几何特性计算 11
3.4截面效率指标ρ检验 11
四、内力计算及组合 12
4.1 荷载 12
4.1.1 13
4.2 支座不均匀沉降 13
4.3 活载 13
五、模型建立与分析 14
5.1 计算模型 14
5.2 主要钢筋布置图及材料用表 15
5.3 截面特性及有效宽度 15
1)截面特性 15
5.4 荷载工况及荷载组合 19
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