摘要 利用Midas软件设计连续刚构桥，连续梁桥一二跨连续系统，可利用边跨连续梁的重量使T结构由不平等的悬臂，以加大主跨的跨径的桥梁。与同类桥梁（如连续梁桥，T型刚构桥多跨刚构桥）：保持连续梁的属性结构，跨越能力大，施工难度小，行车舒适，易于文修，成本低。我们设计布置预应力，以车道荷载，附加静荷载，梁体自重，两个静荷载，列车活载，特殊荷载活荷载，荷载组合。以及温度荷载以及顶板日照荷载。架起桥梁模型后，加上各种恒活载，然后计算出配筋数，然后配上钢筋最后通过预应力计算公式验算。21661
毕业论文关键词：连续刚构桥;预应力钢束;Midas;荷载。
Design of 50 m + 80 m + 50 m continuous rigid frame bridge for high-speed rail
Abstract Used in the design of high-speed railway bridge Midas software of bridge design, continuous rigid frame bridge is a kind of side span of continuous system, can use the weight of the side span continuous beam make T made before long cantilever structure, to increase the mainspan span Bridges. With the same kind bridge (such as continuous girder bridge, T rigid frame bridge) : multi span bridge keeps the upper structure of continuous beam properties, spanning capacity big, less construction difficulty, vehicle body, easy maintenance, low cost. We provide in the design of prestressed reinforcement, adding the lane load, dead load, the beam body weight, the 2nd phase dead load and live load of train live load, special load, the load combination. Sunshine and temperature load and roof load. Bridge model, combined with a variety of live load, and then calculate the number of reinforcement, deserve to go up and then reinforced with prestressed formula calculation.
Keywords continuous rigid frame bridge; prestressed steel ;Midas; load.
目录
1 绪论 1
1.1 本论文的设计目的和意义 1
1.2 桥梁概述 1
1.3 梁桥的概念 2
1.4 桥梁类型 2
1.4.1 体系分类 2
1.4.2 按跨径分类 3
1.4.3 按桥面位置分类 3
1.4.4按主要承重结构所用的材料 3
1.5 桥梁设计的步骤 4
1.6 设计原则 5
1.7 Midas软件介绍 6
1.8 本文设计内容 6
2 本桥型的总体布置及结构主要尺寸的拟定 7
2.1材料规格 7
2.2孔径布置 7
2.3截面设计 7
2.4有限单元模型 8
2.5小结 8
3 计算恒、活载作用下的主梁内力 9
3.1 恒载内力计算 9
3.2 活载内力计算 13
3.3 主梁次内力 16
3.4 顶板日照引起的温度梯度荷载 20
3.5荷载组合 22
3.6小结 22
4 预应力钢束估算和布置 23
4.1 钢束估算 23
4.2 钢束布置 24
4.3 小结 24
5 截面校核 25
5.1 正截面承载能力验算 25
5.2 截面正应力计算 26
5.2.1预加预应力阶段混凝土截面正应力计算 26
5.2.2使用阶段的正应力计算 27
5.3 位移验算 29
5.4 小结 29
6施工、病害及处理 30
6.1 施工 30
6.1.1 设计特点 30
6.1.2受力特点 31 高速铁路50m+80m+50m连续刚构桥设计+CAD图纸:http://www.751com.cn/gongcheng/lunwen_13972.html