目录第 1 章 绪 论..........................................................2第 2 章设计说明............................................................32.1 设计资料..........................................................32.2、设计荷载：公路-I 级...............................................32.3、材料及工艺........................................................32.4 设计依据、法律规范及采纳法律规范...................................3第 3 章上部结构尺寸的拟定.................................................33.1 主梁间距与主梁片数.................................................43.2 主梁跨中截面主要尺寸拟定...........................................43.3 横截面沿跨长的变化.................................................53.4 横隔梁的设置.......................................................6第 4 章 主梁内力计算.......................................................64.1 恒载内力计算.......................................................64.2 活载内力计算......................................................104.3 主梁内力组合......................................................16第 5 章预应力钢束的估算及其布置...........................................175.1 跨中截面钢束的估算与确定.........................................175.2 预应力钢束布置....................................................18第 6 章 计算主梁截面几何特性..............................................226.1 截面面积及惯矩计算...............................................226.2 梁截面对重心轴的静矩计算.........................................23第 7 章 钢束预应力损失计算...............................................257.1 预应力钢筋张拉（锚下）控制应力...............................257.2 钢束应力损失.....................................................25第 8 章 主梁截面验算.....................................................278.1 正截面承载力计算.................................................278.2 斜截面承载力计算..................................................
