石板冲桥施工图设计目录1设计资料与构造布置.............................................................................................................11.1设计资料........................................................................................................................11.1.1桥梁跨径与桥宽..................................................................................................11.1.2材料及工艺..........................................................................................................11.1.3设计依据..............................................................................................................11.1.4基本计算数据......................................................................................................11.2横截面布置....................................................................................................................11.2.1主梁间距与主梁片数..........................................................................................11.2.2主梁跨中截面主要尺寸拟定..............................................................................21.3横截面沿跨长变化........................................................................................................51.4横隔梁的设置................................................................................................................52主梁作用效应计算.................................................................................................................62.1永久作用效应计算........................................................................................................62.1.1永久作用集度......................................................................................................62.2可变作用效应计算........................................................................................................82.2.1冲击系数和车道折减系数..................................................................................82.2.2计算主梁荷载横向分布系数..............................................................................92.2.3车道荷载取值....................................................................................................122.2.4计算可变作用效应............................................................................................122.3主梁作用效应组合......................................................................................................153预应力束的估算及布置.......................................................................................................163.1跨中截面的估算和确定..............................................................................................163.1.1按正常使用极限状态的应力要求估算钢束数................................................163.1.2按承载能力极限状态估算预应力钢束数........................................................163.2预应力钢束布置..........................................................................................................173.2.1跨中截面及锚固截面的钢束位置....................................................................173.2.2钢柬起弯角和线形的确定................................................................................193.2.3钢束计算.......................................................................................................
