发布时间 : 星期三 文章基于Moodle平台的网络课程毕业设计更新完毕开始阅读e4e58a30905f804d2b160b4e767f5acfa1c78311
山东科技大学毕业论文
摘要
本设计为京杭运河大桥主桥上部结构，本桥跨度是42.013+70+40.341，截面为单箱单室。悬臂桥施工方法用平衡悬臂施工。设计荷载为7级，按八级设防。
主桥上部结构施工阶段计算，按照梁段划分施工顺序及
工艺，对每一梁段均考虑挂篮移动就位、浇筑混凝土、张拉预应力等三个施工过程。结合工程实际情况，施工计算共分了31个受力阶段，用《桥梁计算通用程序》分别对各梁段施工过程中的内力、应力、挠度进行了计算和验算。设计中主桥按先边跨合拢，后解除临时锚固，最后中跨合拢的顺序考虑，合拢温度严格控制在11～16℃。
拟定主梁纵、横断面尺寸；采用桥梁博士结构设计程序
计算施工阶段和成桥后的主梁各控制截面的恒载内力、活载内力、温度内力及基础沉降引起的内力，分别按承载能力极限状态和正常使用极限状态进行荷载效应组合；估算预应力钢束数量并确定束数；布置钢束位置；对各控制截面进行强度、应力验算，各项验算均满足《公路钢筋混凝土及预应力混凝土桥涵设计规范》要求。此外，还进行了桥面板设计。
【关键词】：预应力混凝土连续梁桥；悬臂浇注施工；作用效应组合；桥梁博士；方案比选
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山东科技大学毕业论文
Abstract
The design is for the Beijing-Hangzhou Grand Canal
Bridge bridge structure the span of which is 42.013m+
75m +41.m.and the section is single-box. The cantilever bridge use the methode of Balanced Cantilever construction .As aresult of the design load for seven, we use eight for security.
The main structure of the bridge construction phase can
be devide into three phases, in accordance with the beam of the order and process of construction of each beam as wellas the Cradle mobile place, pouring concrete, three-prestressed construction process being taken into account. Works with the actual situation, the construction of the calculation is divided into 31 stages of the force, "General procedures for calculation of the bridge," were the construction of the beam in the process of internal forces, stress, deflection was calculated and checked. The design of the main bridge across-the first closure, after the lifting of temporary anchor, the last in order to consider the cross-Closure, closure strictly control the temperature in the 11 ~ 16 ℃
The size of vertical and cross section of girder is determined. The internal force of construction and operational phase of the control section is calculated using Doctor Bridge structure-design, which include the dead load, the live load, temperature internal forces and infrastructure caused by the internal forces of the settlement. The intensity and stress of Control section is computed respectively according to the ultimate limit state of bearing capacity and the ultimate limit
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山东科技大学毕业论文
state of normal usage the Combination for action effects. The number of prestressed bond is estimation and arranged them. Checking satisfy the requirement of \Highway of reinforced concrete and prestressed concrete bridge design code\ In addition, the bridge deck is designed. Key words:
Continuous prestressed concrete girder bridge;balanced cantilever construction；combination for action effects；Doctor Bridge ；scheme choice
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山东科技大学毕业论文
目录
1 绪论 .............................................................................................. 8 2 桥梁设计 ..................................................................................... 11
2.1 桥梁跨径布置和箱梁截面尺寸拟定 ....................................... 11
2.1.1 跨径比 ............................................................................................... 11
2.1.2 梁高.................................................................................................... 11 2.1.3 顶板厚度 ........................................................................................... 12 2.1.4 底板厚度 ........................................................................................... 12 2.1.5 腹板.................................................................................................... 12 2.1.6 连续通长束不宜过长 ....................................................................... 13 2.1.7 普通钢筋是预应力砼结构中必须配置的材料 ............................... 13 2.1.8 关于扁波纹管、扁锚的采用 ........................................................... 14 2.1.9 关于钢铰线的弹性模量 ................................................................... 14 2.1.10 锚头或齿板的压陷、压崩破坏 ..................................................... 15 2.1.11 横向失稳问题 .................................................................................. 15 2.1.12 先张法预应力混凝土构件的放张 ................................................. 15 2.1.13 超张拉问题 ..................................................................................... 15 2.1.14 灌浆、封锚 ..................................................................................... 16
2.2 引桥上部构造设计要点 ........................................................... 16
2.2.1 遵循的技术标准及规范 ................................................................... 16
2.2.2 主要材料 ........................................................................................... 17
2.3 设计桥梁 ................................................................................... 18
2.2.1 桥型方案 ........................................................................................... 19
2.2.2 上、下部构造 ................................................................................... 19 2.2.3 结构分析 ........................................................................................... 20 2.2.4 预应力体系 ....................................................................................... 21 2.2.5 悬臂施工时期荷载引起的结构内力计算 ....................................... 22 2.2.6 连续梁在运营阶段的结构内力计算 ............................................... 23 2.2.8 预应力混凝土结构的配筋计算 ....................................................... 24 2.2.9 施工顺序 ........................................................................................... 25 2.2.9 其他注意事项 ................................................................................... 27
2.3 预应力施工 ............................................................................... 33
2.3.1 预应力管道质量 ............................................................................... 33
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