桑树沟桥设计（30+50+30 连续刚构桥）+图纸
本设计主要是通过桥梁博士软件来进行计算，得到内力图、弯矩图、剪力图等，在设计中还运用到AutoCAD、Excel等软件来进行辅佐运算。具体的设计步骤有：首先是，拟定结构尺寸、完成软件建模，在这步骤中阶段划分较为重要，其次是，通过桥梁博士软件进行内力的计算并进行预应力筋的配置以及对全桥的检算。最后是完成设计需要的图纸以及对计算整理。22844
毕业论文关键词：钢构桥；预应力筋；强度；桥梁博士
The Design of San Shugou Bridge
(30+50+30 Continuous rigid frame bridge)
Abstract This design is a long-span prestressed concrete continuous frame bridge design 30+50+30m.Full bridge with 3 span one coupling of prestressed concrete continuous beam with variable cross section structure, The form of lines, double-line railway, Box beam high beam is taken two times parabola form,Cross at the pivot point for 1.8m, 3.6M, both ends of abutment, the middle two pier high are 30m. Design load for live load.
This design is mainly through Dr. bridge software to calculate, get the internal force diagram, bending moment diagram, the shear diagram etc.,In the design are applied to AutoCAD, Excel and other software to assist the operation.The steps of concrete design are:First, to complete the structure size, software modeling, stage in this step pision is more important,Secondly, the calculation of internal forces and by Dr. bridge software configuration of prestressed tendons and the full bridge calculation. The last is to complete the design drawings and calculation of consolidation of need.
KeyWords: Steel bridge; prestressed reinforcement; strength；Dr.bridge
目录
摘要 2
绪论 5
第1章 桥跨的总体特点 6
1.1设计特点 6
1.2受力特点 6
1.3构造特点 7
第2章 桥跨总体布置及结构主要尺寸 7
2.1桥跨结构图式及尺寸拟定 7
2.1.1设计技术标准 7
2.1.2主要尺寸拟定 7
2.1.3结构图式 9
2.2 主梁分段与施工阶段的划分 9
第3章 全桥内力计算 11
3.1 计算参数 11
3.2恒载内力计算 11
3.3活载内力计算 14
3.4作用效应组合 14
3.4.1 作用 14
3.4.2 组合原理及规律 14
第4章 预应力钢束设计及截面特性计算 16
4.1 预应力筋的估算 16
4.1.1 预应力筋的估算方法 16
4.1.2 预应力筋的估算 17
第5章 预应力钢筋估算 18
5.1预应力钢束的布置原则 18
5.2预应力钢束估算原则 18
5.3预应力钢筋估算 19
5.4预应力筋实际布置 20
5.5 纵向预应力筋的布置 20
5.6 横向和竖向预应力筋的布置 21
第6章 截面验算 21
6.1承载能力极限状态验算 21
6.2正常使用极限状态验算 31
6.3使用阶段正截面抗裂验算 36
6.4使用阶段斜截面抗裂验算 37