公路—I级桥面宽度26.8m单索面预应力混凝土斜拉桥(计算书、CAD图、开题报告、任务书、文献翻译)
目录
摘要.....................................................................................................................I
Abstract...............................................................................................................II
第1章 绪论......................................................................................................1
1.1 概述..................................................................................................1
1.1.1 结构体系.................................................................................1
1.1.2 主梁.........................................................................................2
1.1.3 索塔.........................................................................................2
1.1.4 拉索.........................................................................................3
1.1.5 桥型确定.................................................................................3
1.2 目的与意义.......................................................................................3
2.1.1 立题目的.................................................................................3
2.1.2 立题意义.................................................................................4
1.3 主要内容..........................................................................................4
第2章 技术指标及设计资料...........................................................................5
2.1 设计依据..........................................................................................5
2.1.1 技术指标.................................................................................5
2.1.2 设计规范.................................................................................5
2.1.3 航运净空.................................................................................5
2.2 材料参数..........................................................................................5
2.2.1 混凝土.....................................................................................6
2.2.2 预应力钢材.............................................................................6
2.2.3 斜拉索.....................................................................................6
2.2.4 桥面铺装.................................................................................6
2.2.5 支座........................................................................................6
2.2.6 伸缩缝....................................................................................6
2.3 设计荷载与组合..............................................................................6
2.3.1 主要设计荷载.........................................................................6
2.3.2 索塔的作用效应组合.............................................................7
2.3.3 拉索的内力组合.....................................................................8
第3章 桥型与结构形式.................................................................................10
3.1 桥型总体布置................................................................................10
3.2 结构形式及尺寸............................................................................12
3.2.1 下部结构构造.......................................................................12
3.2.2 主塔......................................................................................12
3.2.3 斜拉索..................................................................................12
3.2.4 主梁......................................................................................13
第4章 结构整体分析....................................................................................14
4.1 计算原则.......................................................................................14
4.2 基本参数.......................................................................................14
4.2.1 截面性质..............................................................................14
4.2.2 设计荷载..............................................................................15
4.3 建模分析.......................................................................................16
4.3.1 结构计算简图......................................................................16
4.3.2 索力优化前内力及变形.......................................................17
第5章 成桥状态的索力优化........................................................................18
5.1 索力优化原理...............................................................................20
5.2 影响矩阵法优化索力...................................................................20
第6章 拉索设计...........................................................................................28
6.1 恒载索力.......................................................................................28
6.2 拉索构造.......................................................................................29
6.3 拉索下料长度...............................................................................30
6.4 索力验算.......................................................................................34
第7章 索塔锚固区受力分析......................................................................36
7.1 概述...............................................................................................36
7.2 锚固区受力...................................................................................36
7.3 计算分析.......................................................................................38
7.4 预应力筋的估算...........................................................................42
7.4.1 预应力损失..........................................................................42
7.4.2 预应力筋的估算原则..........................................................44
7.4.3 预应力筋布置......................................................................45
7.4.4 估算预应力筋......................................................................45
7.5 有效预应力...................................................................................46
7.6 承载能力极限状态验算...............................................................49
7.6.1 计算原则.............................................................................49
7.6.2 预应力次效应......................................................................50
7.6.3 正截面抗弯承载力计算.......................................................51
7.7 斜截面抗剪承载力.......................................................................55
7.8 持久状况正常使用极限状态计算................................................55
7.9 持久状况应力计算.......................................................................58
结论..................................................................................................................61
致谢..................................................................................................................62
参考文献..........................................................................................................63
附录1...............................................................................................................64
附录2...............................................................................................................66