浙江鱼山大桥预应力混凝土连续梁桥设计(75 m 110 m 75 m)毕业论文
2022-01-16 21:14:19
论文总字数:51044字
摘 要
此次毕业设计是根据《公路桥规》规定以及设计任务书要求,优化设计浙江鱼山大桥方案。首先根据规范要求和工程概况对进行此桥的方案设计和比选,综合考虑,采用腹板为斜腹板、箱梁截面为变高度单箱单室箱型截面的变跨度三跨预应力混凝土连续梁桥, 施工方式为满堂支架就地浇筑施工。根据公路桥规和设计手册初步拟定桥跨布置和截面尺寸后,利用 MIDAS软件建立桥梁模型并计算结构的恒载、活载及次内力等荷载,然后进行荷载组合并画出包络图;接着手算预应力钢筋的估算与布置、截面几何特性、预应力损失等;通过对上部结构进行验算,结果均满足设计要求。最后进行下部结构初步设计,采用球形钢支座、双柱墩和摩擦桩基础。此外,本设计对工程量进行了预算以及施工图绘制等工作。
关键词:方案设计 连续梁桥 预应力 满堂支架施工
Design of Prestressed Concrete Continuous Girder Zhejiang Yushan Bridge
Abstract
According to the requirements of the design document and the regulations of the Highway Bridge Regulation,this design compares and designs the Zhejiang Yushan Bridge.Firstly,according to the requirements of the design document and the regulations of the Highway Bridge Regulation, this design compares and designs the Zhejiang Yushan Bridge , according to the general situation of the project and the requirements of the code, the scheme of the bridge is designed and compared. The selected scheme is a variable-span three-span prestressed concrete continuous girder bridge, with single box and single chamber, variable height box section, and inclined web plate. The construction method is full hall bracket pouring construction. After drawing up the layout and section size of the bridge span according to the highway bridge gauge and design manual, the bridge model is established by using Midas software, and the dead load, live load and secondary internal force of the structure are calculated, and then the load combination is carried out and the envelope diagram is drawn. Then calculate the calculation and arrangement of the prestressed steel bar, the geometric characteristic of section, and the loss of prestressing force. Then the superstructure is checked by hand calculate, and the results meet the design requirements. Finally, the preliminary design of the substructure is carried out, using the basin rubber bearing, the double column pier and the pile foundation.In addition, this design also carries on the project quantity budget, the construction drawing and so on work.
Key Words: Design; Continuous girder bridge; Prestress; full hall bracket pouring construction
目 录
摘要 I
Abstract II
第一章 结构尺寸设计 1
- 桥跨布置 1
- 梁高尺寸拟定 2
- 截面类型拟定 3
- 箱梁细部尺寸拟定 3
1.5 横隔板设计 5
1.6 横桥向设计 5
第二章 恒载计算 10
- 节段划分及截面几何要素计算 10
- 一期恒载计算 11
- 二期恒载计算 11
- 总恒载效应 13
第三章 活载计算 16
- 汽车荷载 16
- 最大、最小弯矩计算 17
- 最大、最小剪力计算 18
第四章 次内力计算 19
- 温度次内力计算 19
- 支座沉降次内力计算 23
第五章 内力组合及内力包络图 24
- 频遇组合 24
- 准永久组合 25
- 基本组合 26
- 包络图 27
第六章 预应力筋的计算与布置 30
- 原理与方法 30
- 预应力筋的配置 30
- 钢束布置 30
第七章 净截面及换算截面几何特性计算 41
7.1 概述 41
- 净截面几何性质计算 41
- 换算截面性质计算 43
第八章 预应力损失及有效预应力计算 45
- 控制应力及有关参数计算 45
- 摩擦损失 46
- 锚具回缩损失 50
- 弹性压缩损失 56
- 应力松弛损失 57
- 收缩徐变损失 57
- 预应力损失组合及有效预应力计算 59
第九章 承载能力极限状态验算 61
- 正截面承载力验算 61
- 斜截面抗剪承载力验算 63
第十章 正常使用极限状态验算 65
10.1 抗裂验算 65
第十一章 持久状况和短暂状况应力验算 67
- 持久状况截面混凝土法向应力验算 67
- 短暂状态应力验算 67
第十二章 墩及桩基础设计与计算 70
12.1 支座 70
- 墩身设计与验算 71
- 承台设计 74
- 桩基础设计 74
第十三章 桥梁工程预算 77
- 工程量估算 77
- 工程造价预算 77
参考文献 80
致 谢 81
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