高速铁路70m+115m+70m矮塔斜拉桥设计(四线)(含CAD图)
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高速铁路70m+115m+70m矮塔斜拉桥设计(四线)(含CAD图)(任务书,外文翻译,论文计算书22000字,CAD图14张)
摘 要
本文以近年来新兴桥型——矮塔斜拉桥作为研究对象,通过对一个结构设计实例的设计与分析,总结了矮塔斜拉桥的特点与优势。
矮塔斜拉桥也称为部分斜拉桥,它的力学性能和经济性介于连续梁桥和斜拉桥之间。矮塔斜拉桥是近期桥梁向轻型化、复合化发展的过程中出现的介于预应力混凝土梁桥与斜拉桥之间的过渡桥型, 它的特点是塔矮、梁刚、索集中布置。与梁桥相比, 这种桥型造型美观, 结构的表现内容丰富,而且具有良好的经济指标, 越来越显示出巨大的发展潜力。
本次本科毕业设计的内容为高速铁路70m+115m+70m二塔三跨预应力混凝土双索面矮塔斜拉桥,边中跨比为0.61。在桥型方案确定以后,参照已建同类型桥梁的设计,进行各部分构件截面尺寸的初步拟定。通过建立合理的计算模型,利用 MIDAS 软件对该桥进行计算模型的建立。通过初步计算,在满足安全、 适用、经济的前提条件下,进行截面尺寸优化设计;根据整体受力计算中主梁内力组 合结果和配束情况对预应力混凝土梁进行正常使用极限状态和承载能力极限状态的设计检算。根据斜拉索的内力组合结果进行斜拉索的应力检算。根据主梁变形计算结果进行主梁的刚度检算。 [资料来源:http://doc163.com]
通过本次设计过程并辅以文献资料对矮塔斜拉桥有了进一步整体认识。矮塔斜拉桥其适用跨径在100m~300m 之间,其克服了多塔斜拉桥所带来的刚度不足和各跨相互影响的弊端,发挥了多跨联系梁桥的优点,无论在单孔跨径和总桥长设计方面均有较大的选择空间。这种新型结构桥型具有造型美观、景观协调、技术先进、经济性好、施工简便等优点。该桥型有望成为主流桥型之一,有待得到进一步的发展。
关键词:矮塔斜拉桥,高速铁路桥梁,悬臂施工,MIDAS/Civil,设计检算
Abstract
In this paper, in recent years new bridge --- Extradossed Bridge as the research object, through a design example of design and analysis, summarizes the characteristics and advantages Extradossed Bridge
Extradossed Bridge, also known as part of the bridge, its mechanical performance and economy between continuous beam bridge and cable-stayed bridge. Extradossed Bridge is a transitional bridge prestressed concrete beam bridge and cable-stayed bridge is a bridge between the lighter and complex process of development that appear in the near future between, it is characterized by a low tower, Liang Gang, Cable focus arrangement. Compared with the bridge, this bridge is handsome in appearance, rich and expressive content structure, but also has good economic indicators, increasingly showing great potential for development. [资料来源:http://doc163.com]
The content of the undergraduate graduation design a high-speed railway 70m + 115m + 70m two towers three-span prestressed concrete cable-stayed bridge with double cable planes short tower, while the span ratio of 0.61. After the bridge is finalized, referring to the same type of bridge built design, preparation of preliminary cross-sectional dimension of each part of the member. By establishing reasonable computational model, using MIDAS software build the bridge computing model. By preliminary calculations, to meet the security, application, under the precondition of economic and conduct cross-sectional size optimization design; according to the combined result of internal forces and with the whole bundle circumstances force calculation in the main beam of the prestressed concrete beams limit state and carrying capacity detection limit state design calculation. Stay Cable operators conduct stress check cables in accordance with the results of internal force. Rigidity Check Computation carried out according to the main beam of the main beam deformation results. [资料来源:http://Doc163.com]
And supplemented by literature on Extradossed Bridge has been further understanding through this whole design process. Extradossed Bridge span in their application between 100m ~ 300m, which overcome the multi-tower cable-stayed bridge caused by insufficient stiffness and disadvantages of each cross-interaction plays a multi-span beam bridge links the advantages, in terms of hole total length of the bridge span and design have a greater choice. The new structure bridge with a beautiful shape, landscape coordination, advanced technology, economy
Good, simple construction and so on. The bridge is expected to become one of the mainstream type of bridge, pending further development.
Keywords: low tower cable-stayed bridge, railway bridge, cantilever construction, MIDAS / Civil, Design inspecting calculation
设计主要技术指标
1、线路条件:直线四线250 km/h客运专线,线间距5.0 m。
2、桥梁结构形式:预应力混凝土梁矮塔斜拉桥。
3、列车荷载:ZK活载。
4、桥面布置:满足高速铁路建筑限界要求,防撞墙内侧净宽不小于19.0 m;桥面采用无碴轨道形式。 [资料来源:https://www.doc163.com]
5、施工方法:主梁除0#段、边跨过渡墩附近部分梁段采用支架施工外,其余梁段采用挂篮悬臂浇筑施工。
[来源:http://www.doc163.com]
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[资料来源:http://Doc163.com]
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目 录
摘 要 I
Abstract II
第1章 绪论 1
1.1 引言 1
1.2 国内外矮塔斜拉桥的发展概况 1
1.3 高速铁路桥梁设计原则及特点 1
1.4 矮塔斜拉桥特点概述 2
1.5 设计基本资料 3
1.5.1 设计题目 3
1.5.2 设计主要技术指标 3
1.5.3 主要设计参考规范 4
1.5.4 设计参考书目 4
1.5.5 主要设计内容要求 4
1.5.6 绘图内容 6
1.5.7 论文工作 7
第2章 桥型方案总体设计 8
2.1 桥跨布置 8
[资料来源:https://www.doc163.com]
2.1.1 桥跨布置过程 8
2.1.2 主梁控制尺寸的确定 10
2.1.3 主梁横断面设计 10
2.1.4 索塔控制尺寸的确定 11
2.1.5 斜拉索的总体设计 13
2.2 主要结构设计施工要点 15
2.2.1 主梁施工控制方法及注意事项 15
2.2.2 桥塔和桥墩施工 16
2.2.3 斜拉索施工 17
2.2.4 支座和伸缩缝 17
2.2.5 桥面铺装设计 18
第3章 矮塔斜拉桥的整体受力计算 19
3.1 MIDAS/Civil 整体计算模型的建立 19
3.2 模型的主要计算参数 20
3.3 MIDAS/Civil 分阶段计算模型的建立 21
3.4 恒载状态计算结果 23
3.4.1 一次成桥模型计算结果 23
3.4.2分阶段模型的典型施工阶段计算结果 23
3.4.3分阶段模型的成桥恒载状态计算结果 25 [版权所有:http://DOC163.com]
3.5活载状态计算 26
3.5.1动车活载在MIDAS中的输入 26
3.5.2主梁在ZK活载作用下内力结果 27
3.6 主梁的内力包络图 28
第4章 矮塔斜拉桥的主梁预应力筋设计 29
4.1 矮塔斜拉索的索力确定方法 29
4.1.1 截面上缘配置预应力筋情况 30
4.1.2 截面上缘配置预应力筋情况 32
4.1.3 截面下缘配置预应力筋情况 33
4.1.4 截面上下缘均配置预应力筋情况 33
4.2 设计中的预应力估算结果 34
4.2.1 主梁墩根部断面估束 34
4.2.2 跨中截面估束 35
4.3 体内预应力钢筋的布束结果 35
第5章 矮塔斜拉桥的设计检算 38
5.1 主梁荷载组合 38
5.2 主梁正截面强度检算 38
5.2.1 主梁跨中截面强度检算 40
5.2.2 支点截面强度检算 41 [来源:http://www.doc163.com]
5.3 斜截面抗剪强度检算 42
5.3.1 边跨截面抗剪强度检算 43
5.3.2 支点截面抗剪强度检算 44
5.4 主梁截面抗裂性检算 45
5.4.1 正截面抗裂性 45
5.4.2 斜截面抗裂性 46
第6章 主要材料数量汇总 47
结 论 48
致 谢 49
[资料来源:http://Doc163.com]