第页目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc64342873"1河水文设计原始资料及计算PAGEREF_Toc64342873\h6HYPERLINK\l"_Toc64342874"1.1设计原始资料PAGEREF_Toc64342874\h6HYPERLINK\l"_Toc64342875"1.2河段类型判断PAGEREF_Toc64342875\h6HYPERLINK\l"_Toc64342876"1.3设计流量和设计流速的复核PAGEREF_Toc64342876\h6HYPERLINK\l"_Toc64342877"1.4拟定桥长PAGEREF_Toc64342877\h7HYPERLINK\l"_Toc64342878"1.6冲刷计算PAGEREF_Toc64342878\h10HYPERLINK\l"_Toc64342879"1.7方案比选PAGEREF_Toc64342879\h11HYPERLINK\l"_Toc64342880"2设计资料及构造布置PAGEREF_Toc64342880\h12HYPERLINK\l"_Toc64342881"2.1设计资料PAGEREF_Toc64342881\h12HYPERLINK\l"_Toc64342882"2.2横截面布置PAGEREF_Toc64342882\h14HYPERLINK\l"_Toc64342883"2.3横截面沿跨长的变化PAGEREF_Toc64342883\h17HYPERLINK\l"_Toc64342884"2.4横隔梁的位置PAGEREF_Toc64342884\h17HYPERLINK\l"_Toc64342885"3主梁作用效应计算PAGEREF_Toc64342885\h18HYPERLINK\l"_Toc64342886"3.1恒载内力计算PAGEREF_Toc64342886\h18HYPERLINK\l"_Toc64342887"3.1.1.恒载集度PAGEREF_Toc64342887\h18HYPERLINK\l"_Toc64342888"3.1.2恒载内力PAGEREF_Toc64342888\h19HYPERLINK\l"_Toc64342889"3.2可变作用效应计算（修正刚性横隔梁）PAGEREF_Toc64342889\h21HYPERLINK\l"_Toc64342890"3.2.1冲击系数和车道折减系数PAGEREF_Toc64342890\h21HYPERLINK\l"_Toc64342891"3.2.2计算主梁的荷载横向分布系数PAGEREF_Toc64342891\h21HYPERLINK\l"_Toc64342892"3.2.3车道荷载的取值PAGEREF_Toc64342892\h26HYPERLINK\l"_Toc64342893"3.2.4计算可变作用效应PAGEREF_Toc64342893\h26HYPERLINK\l"_Toc64342894"3.3主梁作用效应组合PAGEREF_Toc64342894\h31HYPERLINK\l"_Toc64342895"4预应力钢束的估算及其布置PAGEREF_Toc64342895\h33HYPERLINK\l"_Toc64342896"4.1跨中截面钢束的估算和确定PAGEREF_Toc64342896\h33HYPERLINK\l"_Toc64342897"4.2预应力纲筋的布置PAGEREF_Toc64342897\h34HYPERLINK\l"_Toc64342898"4.2.1跨中截面预应力钢筋的布置PAGEREF_Toc64342898\h34HYPERLINK\l"_Toc64342899"4.2.2锚固面钢束布置PAGEREF_Toc64342899\h34HYPERLINK\l"_Toc64342900"4.2.3其他截面钢束位置及倾角计算PAGEREF_Toc64342900\h35HYPERLINK\l"_Toc64342901"4.3非预应力钢筋截面积估算及布置PAGEREF_Toc64342901\h38HYPERLINK