预应力连续梁桥设计.rar
预应力连续梁桥设计,包括任务书，开题报告，设计书，翻译资料摘 要毕业设计主要是关于小跨度预应力混凝土连续梁桥上部结构的设计。预应力混凝土连续梁桥以结构受力性能好、变形小、伸缩缝少、行车平顺舒适、养护工程量小、抗震能力强等而成为最富有竞争力的主要桥型之一。受时间和个人能力的限制，本次毕业设计没有具体涉及到下部结构、横向预应...
该文档为压缩文件,包含的文件列表如下:
内容介绍
原文档由会员 tts123 发布
预应力连续梁桥设计
包括任务书，开题报告，设计书，翻译资料
摘 要
毕业设计主要是关于小跨度预应力混凝土连续梁桥上部结构的设计。预应力混凝土连续梁桥以结构受力性能好、变形小、伸缩缝少、行车平顺舒适、养护工程量小、抗震能力强等而成为最富有竞争力的主要桥型之一。受时间和个人能力的限制，本次毕业设计没有具体涉及到下部结构、横向预应力及竖向预应力的设计。
设计桥梁跨度为2×30m,为单箱双室，桥面宽12m，分为2车道。主梁施工采用满堂支架施工。
设计过程如下：
首先，确定主梁主要构造及细部尺寸，它必须与桥梁的规定和施工保持一致，设计采用箱形梁。顶板、底板厚度沿全桥保持不变,均为0.25m。
其次，利用桥梁博士分析内力结构总的内力(包括恒载和活载的内力计算)。用于计算的内力组合结果也由桥梁博士计算而得，从而估算出纵向预应力筋的数目，然后再布置预应力钢丝束。
再次，计算预应力损失及次内力，次内力包括先期恒载徐变次内力、先期预应力徐变次内力、局部温度变化次内力。
然后进一步进行截面强度的验算，其中包括承载能力极限状态和正常使用极限状态。在正常使用极限状态验算中包括计算截面的混凝土法向应力验算、预应力钢筋中的拉应力验算、截面的主应力计算
关键词：预应力混凝土连续梁桥 次内力 支架现浇施工
Abstract
The graduate design is mainly about the design of superstructure of short-span pre-stressed concrete continuous box Girder Bridge. Pre-stressed concrete continuous Girder Bridge become one of main bridge types of the most full of competion ability because of subjecting to the dint function with the structure good, having the small deformation, few of control joint, going smoothly comfort, protected the amount of engineering small and having the powerfully ability of earthquake proof and so on. For time and ability limited, the design of the substructure, transverse pre-stressing and vertical pre-stressing is not considered.
The spans of the bridge are 2×30 m, main beam is respective designed, each suit has one box two room and two traffic ways, the width of the bridge surface is 12m.
The procedure of the design is listed below:
The first step as to dimension the structural elements and details of which it is composed, it can’t and certainly should without being fully coordinated with the planning and working phrases of the project. Considering the distorting stiffness and the bending stiffness, box birder goes as second-parabolic curve, for second-parabolic curve is generally similar to the change of continuous bridge’s bending moments along. The section at the support is strengthened by the provision of thickened webs , bottom slabs and a cross beam , the thickness of the bottom slab and the top slab is 0.25m.
The second step is to use Dr.Bridge3.03 to analyze internal gross force of the structures (including dead load and lived load), the internal force composition can be done by using the compute results. According to the internal force composite, the eva luated amount of longitudinal tendons can be worked out, then we can distribute the tendons to the bridge.
The third step is to calculate the loss of pre-stressing and secondary force due to pre-stressing, first dead loads and temperature, bearing displacement, and so on.
The last step is checking the main cross section. The work includes the load-caring capacity ultimate state and the normal service ability ultimate state as well as the main section’s being out of shape.
Key Words: grade separated Pre-stressed concrete continuous girder bridge Secondary force Full scaffold construction
目 录
第1章 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 1
第2章 桥跨总体布置及结构尺寸拟定 3
2.1 尺寸拟定 3
2.1.1 立截面 3
2.1.2 横截面 3
2.1.3 梁高 4
2.1.4 细部尺寸 4
2.2 主梁分段与施工阶段的划分 5
2.2.1 分段原则 5
2.2.2 具体分段 6
2.2.3 施工方法及注意事项 6
第3章 荷载内力计算 7
3.1 恒载内力计算 7
3.2 活载内力计算 10
第四章 预应力钢束的估算与布置 11
4.1 计算原理 11
4.2 预应力钢束的估算 15
4.3 预应力钢束的布置 15
4.3.1 布束原则 15
4.3.2 具体布置 16
第五章 全桥结构安全验算 17
5.1 全桥安全验算信息输入 17
5.2 全桥结构安全验算 17
5.2.1 承载能力极限状态验算 17
5.2.2 正常使用阶段验算 17
5.3 施工阶段组合应力验算 20
第6章 桥墩设计 22
6.1 截面选择 22
6.2 桥墩计算模型的建立 22
6.3 内力计算 23
6.4 计算配筋 24
6.5 结构安全验算 24
参考文献 25
致谢语 26
附录A 27
附录B 34
包括任务书，开题报告，设计书，翻译资料
摘 要
毕业设计主要是关于小跨度预应力混凝土连续梁桥上部结构的设计。预应力混凝土连续梁桥以结构受力性能好、变形小、伸缩缝少、行车平顺舒适、养护工程量小、抗震能力强等而成为最富有竞争力的主要桥型之一。受时间和个人能力的限制，本次毕业设计没有具体涉及到下部结构、横向预应力及竖向预应力的设计。
设计桥梁跨度为2×30m,为单箱双室，桥面宽12m，分为2车道。主梁施工采用满堂支架施工。
设计过程如下：
首先，确定主梁主要构造及细部尺寸，它必须与桥梁的规定和施工保持一致，设计采用箱形梁。顶板、底板厚度沿全桥保持不变,均为0.25m。
其次，利用桥梁博士分析内力结构总的内力(包括恒载和活载的内力计算)。用于计算的内力组合结果也由桥梁博士计算而得，从而估算出纵向预应力筋的数目，然后再布置预应力钢丝束。
再次，计算预应力损失及次内力，次内力包括先期恒载徐变次内力、先期预应力徐变次内力、局部温度变化次内力。
然后进一步进行截面强度的验算，其中包括承载能力极限状态和正常使用极限状态。在正常使用极限状态验算中包括计算截面的混凝土法向应力验算、预应力钢筋中的拉应力验算、截面的主应力计算
关键词：预应力混凝土连续梁桥 次内力 支架现浇施工
Abstract
The graduate design is mainly about the design of superstructure of short-span pre-stressed concrete continuous box Girder Bridge. Pre-stressed concrete continuous Girder Bridge become one of main bridge types of the most full of competion ability because of subjecting to the dint function with the structure good, having the small deformation, few of control joint, going smoothly comfort, protected the amount of engineering small and having the powerfully ability of earthquake proof and so on. For time and ability limited, the design of the substructure, transverse pre-stressing and vertical pre-stressing is not considered.
The spans of the bridge are 2×30 m, main beam is respective designed, each suit has one box two room and two traffic ways, the width of the bridge surface is 12m.
The procedure of the design is listed below:
The first step as to dimension the structural elements and details of which it is composed, it can’t and certainly should without being fully coordinated with the planning and working phrases of the project. Considering the distorting stiffness and the bending stiffness, box birder goes as second-parabolic curve, for second-parabolic curve is generally similar to the change of continuous bridge’s bending moments along. The section at the support is strengthened by the provision of thickened webs , bottom slabs and a cross beam , the thickness of the bottom slab and the top slab is 0.25m.
The second step is to use Dr.Bridge3.03 to analyze internal gross force of the structures (including dead load and lived load), the internal force composition can be done by using the compute results. According to the internal force composite, the eva luated amount of longitudinal tendons can be worked out, then we can distribute the tendons to the bridge.
The third step is to calculate the loss of pre-stressing and secondary force due to pre-stressing, first dead loads and temperature, bearing displacement, and so on.
The last step is checking the main cross section. The work includes the load-caring capacity ultimate state and the normal service ability ultimate state as well as the main section’s being out of shape.
Key Words: grade separated Pre-stressed concrete continuous girder bridge Secondary force Full scaffold construction
目 录
第1章 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 1
第2章 桥跨总体布置及结构尺寸拟定 3
2.1 尺寸拟定 3
2.1.1 立截面 3
2.1.2 横截面 3
2.1.3 梁高 4
2.1.4 细部尺寸 4
2.2 主梁分段与施工阶段的划分 5
2.2.1 分段原则 5
2.2.2 具体分段 6
2.2.3 施工方法及注意事项 6
第3章 荷载内力计算 7
3.1 恒载内力计算 7
3.2 活载内力计算 10
第四章 预应力钢束的估算与布置 11
4.1 计算原理 11
4.2 预应力钢束的估算 15
4.3 预应力钢束的布置 15
4.3.1 布束原则 15
4.3.2 具体布置 16
第五章 全桥结构安全验算 17
5.1 全桥安全验算信息输入 17
5.2 全桥结构安全验算 17
5.2.1 承载能力极限状态验算 17
5.2.2 正常使用阶段验算 17
5.3 施工阶段组合应力验算 20
第6章 桥墩设计 22
6.1 截面选择 22
6.2 桥墩计算模型的建立 22
6.3 内力计算 23
6.4 计算配筋 24
6.5 结构安全验算 24
参考文献 25
致谢语 26
附录A 27
附录B 34
