纬一河2#桥设计计算书（上部结构）
致 谢
历经几个月的的毕业设计接近尾声了。心理颇多感慨，从一开始对模型方案图的一无所知，对cad操作的生涩。在老师和同学的帮助下，逐渐熟悉、熟练。在桥隧，每一位老师都有着各自鲜明的特点，但是他们都有着让我们一下子豁然开朗的能力。我的导师，王骞老师。相处的几个月里，对我和我们组的夏建光同学认真负责。对我们要求也比较细。和老师相处的几个月里面，感觉她就像一位大姐姐，在指导我们设计的同时，我们其他方面的困难也常常向她倾述。还有设计院的蒋少寒设计师，专业是他的代名词，在设计过程中，我们看到了设计师专业的水准。在诸多技术上的问题，他都能给予明确的解答，让我们能够明白！其他的老师大多都是我们方向的专业老师，也大多给我们授过课。他们都给与我们很多帮助，帮助我们了解设计、了解软件、了解模型。最后，在这次毕业设计中我们收获很多，也十分感谢老师们对我们的指导帮助！
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目 录
1 概 述 ............................................................................................................................................................. 1
1.1 工程概况 ............................................................................................................................................ 1 1.2 技术标准 ............................................................................................................................................ 2 1.3 设计遵循的依据 ................................................................................................................................ 2 1.4 方案比选 ............................................................................................................................................ 3
1.4.1 连续梁方案 ............................................................................................................................. 3 1.4.2 拱桥方案 ................................................................................................................................. 3 1.4.3 方案比选 ................................................................................................................................. 5 1.4.4 比选结果 ................................................................................................................................. 5 1.5主要材料及其特性 ............................................................................................................................. 6 1.6计算荷载 ............................................................................................................................................. 6
1.6.1永久荷载 .................................................................................................................................. 6 1.6.2活载 .......................................................................................................................................... 6 1.6.3温度荷载 .................................................................................................................................. 7 1.6.4基础变位 .................................................................................................................................. 7 1.7荷载组合及容许应力 ......................................................................................................................... 7
1.7.1承载力极限状态组合： .......................................................................................................... 8 1.7.2持久状况应力验算： .............................................................................................................. 8 1.7.3抗裂验算： .............................................................................................................................. 8 1.8计算书的内容 ..................................................................................................................................... 9 2 桥梁上部结构主梁纵向计算 ....................................................................................................................... 9
2.1 主梁纵向计算模型 ............................................................................................................................ 9 2.2 主梁纵向计算结果 ............................................................................................................................ 9
2.2.1 承载能力极限状态验算 ....................................................................................................... 10 2.2.2 正常使用阶段应力验算 ....................................................................................................... 10 2.2.3 正常使用阶段抗裂验算 ........................................................................................................ 11 2.2.4 挠度验算 ............................................................................................................................... 12
3 桥梁上部结构横梁计算结果 ..................................................................................................................... 12
3.1 计算参数 .......................................................................................................................................... 13 3.2 计算结果 .......................................................................................................................................... 14
3.2.1 端横梁验算 ........................................................................................................................... 14 3.2.2 中横梁验算 ........................................................................................................................... 15
4 桥梁上部结构桥面板和悬臂板计算结果 ................................................................................................. 16
4.1 计算参数 .......................................................................................................................................... 16 4.2 桥面板计算结果 .............................................................................................................................. 17 4.3 悬臂板计算结果 .............................................................................................................................. 19
4.3.1 车行道悬臂板计算结果 ....................................................................................................... 19 4.3.2 人行道悬臂板计算结果 ....................................................................................................... 20
5 下部结构计算 ............................................................................................................................................. 22
5.1 计算参数 .......................................................................................................................................... 22
5.1.1 荷载 ....................................................................................................................................... 22 5.1.2 荷载组合 ............................................................................................................................... 22
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纬一河2#桥设计计算书（上部结构）
5.2 主桥桥墩、桩的计算 ...................................................................................................................... 23
5.2.1 计算模型 ............................................................................................................................... 23 5.2.2 设计计算参数 ....................................................................................................................... 25 5.2.3 下部主要构件的模拟 ........................................................................................................... 26 5.2.4主要构件间的连接 ................................................................................................................ 27 5.2.5静力计算结果 ........................................................................................................................ 27
6 承台计算 ..................................................................................................................................................... 29
6.1 计算参数 .......................................................................................................................................... 29
6.1.1 荷载 ....................................................................................................................................... 29 6.1.2 荷载组合 ............................................................................................................................... 29 6.2 主桥桥墩承台 .................................................................................................................................. 29 致 谢 ............................................................................................................................................................... 30
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摘 要
本文主要论述了盘锦新区纬一河二号桥的设计和计算过程。首先，进行桥型方案的比选，根据桥梁所处位置的实际情况及设计要求，初步拟定了2个方案——连续梁桥、拱桥。从安全、经济、实用、美观的原则出发，比较后最终选择了一个设计方案——连续梁桥
选定此方案后，首先结合前人设计经验，规范以及已建的相关桥梁资料拟定本方案桥梁结构的主要尺寸和细部尺寸，以便进行下一步的结构计算。其次，进行上部结构挂梁和箱梁的计算，学习Midas并用Midas对主桥部分建立模型进行上部结构受力计算。按计算所得内力对上部结构配置普通受力筋，分布筋，并将配置的钢筋输入Midas建立的模型中。最后对配好钢筋的桥梁进行强度验算、裂缝宽度验算、刚度验算。上部结构计算完成后进行下部结构的计算。下部结构计算主要是承台和桩基础计算，包括承台和桩的尺寸拟定、配筋设计和强度验算。桩配筋后要考虑在E2地震力下的承载力能力是否满足规范要求。最后对本次毕业设计进行总结。
关键词：连续梁;Midas;上部结构设计;下部结构设计
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纬一河2#桥设计计算书（上部结构）
Abstract
This article mainly discusses the design and calculation process of the No. 2 Bridge on the Wei Yi River in the New District of Pan Jin. First, make a comparison and a decision of bridge schemes. According to the actual situation of the location of the bridge and the design requirements, preliminary two schemes are worked out including a simply supported：Continuous girder bridge and Arch bridge. Considered the security, the economy, the practical applicability and the beauty, a design scheme is chosen eventually after the compariasion. The Continuous girder bridge the appearance of which is arch bridge with hanging girder is chosen as the final bridge scheme.
The final bridge scheme has been decided. First, the main dimensions and the detail size of the bridge structure need to be formulated combined previous design experience, specification, and the information of the bridges that have been built to calculate the structure for the next step. Secondly, calculate the upper structure including the beam and the box girder. Learn how to use Midas and build the model of the main part of the bridge by Midas to calculate the upper structure of the bridge. Configurate the common mechanical reinforcement and the distribution reinforcement according to the internal force of upper structure calculated, and input the reinforcement configuratied to the model establish by Midas. Finally, the checking calculation of crack width, strength and rigidity is done to the bridge which has been matched the reinforcement well. Calculate the bottom structure after the completion of the upper structure calculation. The bottom structural calculation is mainly about the cap and pile foundation, including the decision of the size, reinforcement design and checking calculation of strength of the cap and pile foundation. The pile which has been given reinforcement need to be considered the bearing capacity under E2 earthquake force whether meet the specification requirements. Finally, summarize this graduate design.
Key Words：Continuous girder bridge; Midas; The upper structure design; The bottom structure design
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