毕业道桥

目 录 TOC \o "1-3" \h \z \u HYPERLINK \l "_Toc263504249" 1 方案比选 PAGEREF _Toc263504249 \h 1 HYPERL

目录 1方案比选 ............................................................. 1 1.1方案比选的主要标准 ............................................... 1 1.2方案编制 ......................................................... 1 1.3方案评选 ......................................................... 3 2桥梁的设计计算 ....................................................... 4 2.1设计资料 ......................................................... 4 2.2横截面布置 ....................................................... 5 2.3横截面沿跨长的变化 .............................................. 10 2.4横隔梁的设置 .................................................... 10 3主梁作用效应计算 .................................................... 11 3.1永久作用效应计算 ................................................ 11 3.1.1永久作用集度 .................................................. 11 3.1.2永久作用效应 .................................................. 12 3.2可变作用效应计算（偏心压力法） .................................. 13 3.2.3车道荷载的取值 ................................................. 17 3.2.4计算可变作用效应 ............................................... 17 4预应力钢束的估算及其布置 ............................................ 24 5计算主梁截面几何特性 ................................................ 27 6钢束预应力损失计算 .................................................. 27 6.1预应力钢筋张拉（锚下）控制力 ................................. 27 6.2钢束应力损失 .................................................... 27 7主梁截面承载力与应力验算 ............................................ 27 7.1持久状况承载能力极限状态承载力验算 .............................. 27 7.2应力验算 ........................................................ 27 7.3抗裂性验算 ...................................................... 27 8行车道板计算 ........................................................ 27 .................................................................................................................................................. 27 9支座计算 ....................................................................................................................................................... 27 参考文献 ................................................................................................................................................................ 27 致谢