毕业设计 30m预应力简支t型梁桥设计.doc

约56页DOC格式手机打开展开

毕业设计 30m预应力简支t型梁桥设计,目录摘要iabstractii第1章设计内容及构造布置11.1设计内容11.2方案比选21.3横截面布置41.4横截面沿跨长的变化71.5横隔梁的设置7第2章主梁内力计算72.1恒载内力计算72.2活载内力计算102.3主梁内力组合18第3章预应力钢束的估算以及布置193.1跨中截面钢束的估算与确定193.2预应力钢束...
编号:20-198789大小:1.67M
分类: 论文>土木工程/建筑论文

内容介绍

此文档由会员 ljjwl8321 发布

目录
摘要 I
ABSTRACT II
第1章 设计内容及构造布置 1
1.1 设计内容 1
1.2 方案比选 2
1.3 横截面布置 4
1.4 横截面沿跨长的变化 7
1.5 横隔梁的设置 7
第2章 主梁内力计算 7
2.1 恒载内力计算 7
2.2 活载内力计算 10
2.3 主梁内力组合 18
第3章 预应力钢束的估算以及布置 19
3.1 跨中截面钢束的估算与确定 19
3.2 预应力钢束布置 19
3.3 非预应力钢筋截面积估算及布置 24
第4章 计算主梁截面几何特性 24
4.1 主梁预制并张拉预应力钢筋 25
4.2 灌浆封锚,主梁吊装就位并现浇300MM湿接缝 25
4.3 桥面、栏杆施工和运营阶段 26
第5章 钢束预应力损失计算 27
5.1 预应力钢束与管道壁之间的摩擦引起的预应力损失 27
5.2 由锚具变形、钢束回缩引起的损失 28
5.3 混凝土弹性压缩引起的损失 29
5.4 由钢束应力松弛引起的损失 30
5.5 混凝土收缩和徐变引起的损失 31
5.6 预应力内力计算及钢束预应力损失汇总 32
第6章 主梁截面验算 32
6.1 截面应力验算 33
6.2 抗裂性验算 37
第7章 锚固区局部承压验算 39
第8章 主梁变形验算 41
8.1 荷载短期效应作用下主梁挠度验算 41
8.2 预加力引起的上拱度计算 42
8.3 预拱度的设置 43
第9章 横隔梁计算 43
9.1 确定作用在跨中横隔梁上的计算荷载 43
9.2 跨中横隔梁的内力影响 44
第10章 行车道板计算 47
10.1 悬臂板荷载效应计算(边梁) 47
10.2 铰接悬臂板荷载效应计算(中梁) 48
参考文献 52
致谢 53

30m预应力简支T型梁桥设计
专业年级: 姓名:
指导教师:

摘要:目前,预应力混凝土被广泛的使用于各种中小跨度的桥梁中,而且大量采用预应力混凝土将是未来桥梁发展的趋势。在本次毕业设计中,对目前在公路桥梁中经常使用的预应力混凝土简支T型梁桥的设计做了全面的介绍,其中包括调研,外文资料的翻译,方案设计,结构计算以及施工图的绘制,并对预应力混凝土梁桥的特点做了详细的介绍。在确定方案时,根据调研及查阅大量的资料,在此桥位上布置了钢管混凝土桥,钢筋混凝土箱型拱桥及预应力混凝土简支T型梁桥三种设计方案,根据“安全,功能,经济,美观”的原则,对各种桥型的优缺点进行了比选,而预应力混凝土简支T型梁桥在此桥位上更具有竞争力,反映在工程造价比较低,施工工期短,施工技术成熟,因此,最终选择了预应力混凝土简支T梁桥为设计方案。 结构计算着重进行了上部结构的计算,包括截面尺寸的拟定,内力计算(恒载内力,活载内力和附加内力的计算,内力组合以及影响线),配筋设计,施工阶段和使用阶段的应力验算,承载能力极限状态强度验算,刚度验算,变形验算。
通过本次毕业设计,进一步加深了我对桥梁以及预应力混凝土的认识。

关键词: 预应力混凝土 T型梁桥 结构计算 设计方案 施工图










30m prestressed simply supported T-beam bridge design
Professional Grade: Name:
Teachers:

Abstract: Nowdays, the pre-stressed concrete is extensively used in various kinds of bridges of medium and small span ,and it will be development trend of the bridge in the future to adopt the bridge of the pre-stressed concrete in a large amount in this graduation design ,overall introduction of the pre-stressed T-section concretebeam bridge among highway bridge often used at presentis made,includinginvestigationandresearch,translation,conceptualdesign ,calculation of structure and drawing, and make detailed introduction to the characteristicofpre-stressedconcretebridge.whileconfirmingthescheme ,according to investigation, research and information. the concrete-filled steel tubular arch bridge , the rigid bridge, cable-stayed bridge of three spans, suspension bridge .cable-stayed bridge of twospans,the pre-stressed T-section concrete beam bridge ,according to the principle of the design of the scheme , introduction to the advantage and disadvantage of the various bridges is made , but the pre-stressed T-section concrete beam bridge is in conformity with this location ,and the projection fabrication cost is lower, the time for a projection is very short ,construction technology is ripe so , I choose the pre-stressed T-section concrete beam bridge on the location finally .The calculation of structure mainly includes the superstructure such as studying out size of section ,calculating the internal force (the calculation of the internal force under constant load, mobile load and additional load );the design of reinforcing;thechecking computation of the stress in the construction stage andwhenthebridges broughttouse;thechecking computation of the intensity under the limit state of carrying capacity.
Through this graduation design, my understanding of the pre-stressed concrete are strengthened further .

Keywords: thepre-stressedconcrete T-sectionbeambridge calculation of structure design Projection draw