【正文】 ......................... 1 連續(xù)剛構(gòu)橋的受力特點(diǎn) ............................................................................................. 1 連續(xù)剛構(gòu)橋的構(gòu)造特點(diǎn) ............................................................................................. 2 零號(hào)塊 .............................................................................................................. 2 橫隔板 .............................................................................................................. 2 合攏段 .............................................................................................................. 2 2 橋跨總體布置及尺寸擬定 .................................................................................................. 3 設(shè)計(jì)基本資料 ............................................................................................................. 3 橋址處自然情況 .............................................................................................. 3 設(shè)計(jì)依據(jù) .......................................................................................................... 4 設(shè)計(jì)方案比選 ............................................................................................................. 5 橋梁設(shè)計(jì)原則 .................................................................................................. 5 橋型方案一（預(yù)應(yīng)力混凝土連續(xù)剛構(gòu)橋） .................................................. 6 橋型方案二（預(yù)應(yīng)力混凝土連續(xù)梁橋） ...................................................... 7 橋型方案三（斜拉橋） .................................................................................. 8 梁體截面比選 ........................................................................................................... 10 橋梁整體布置和尺寸擬定 ....................................................................................... 11 橋梁施工階段劃分 ................................................................................................... 12 懸臂施工過(guò)程及注意事項(xiàng) ....................................................................................... 13 3 主梁內(nèi)力計(jì)算 .................................................................................................................... 16 恒載內(nèi)力計(jì)算 ........................................................................................................... 16 活載內(nèi)力計(jì)算 ........................................................................................................... 20 溫度次內(nèi)力及支座沉降 ........................................................................................... 24 混凝土收縮徐變引起的內(nèi)力 ................................................................................... 30 作用效應(yīng)的組合 ....................................................................................................... 32 承載能力作用效應(yīng)的組合 ............................................................................ 32 II 正常使用極限狀態(tài)下的荷載組合 ................................................................ 33 內(nèi)力組合結(jié)果 ................................................................................................. 34 荷載組合內(nèi)力包絡(luò)圖 .................................................................................... 37 4 預(yù)應(yīng)力鋼束的估算及布置 ................................................................................................ 40 鋼束估算 ................................................................................................................... 40 預(yù)應(yīng)力筋的布置 ....................................................................................................... 46 5 預(yù)應(yīng)力損失及有效應(yīng)力計(jì)算 ............................................................................................ 48 預(yù)應(yīng)力損失計(jì)算 ....................................................................................................... 48 摩阻損失 ........................................................................................................ 48 錨具變形損失 ................................................................................................ 51 混凝土的彈性壓縮 ........................................................................................ 53 鋼束松弛損失 ................................................................................................ 54 收縮徐變損失 ................................................................................................ 54 有效預(yù)應(yīng)力計(jì)算 ....................................................................................................... 56 配筋后的荷載組合 .................................................................................................... 56 配筋后的內(nèi)力包絡(luò)圖 ............................................................................................... 59 6 主梁驗(yàn)算 ............................................................................................................................ 61 截面幾何特性計(jì)算 .................................................................................................... 61 主梁截面內(nèi)力應(yīng)力驗(yàn)算 ........................................................................................... 63 主梁截面抗彎驗(yàn)算 ........................................................................................ 63 截面抗裂性驗(yàn)算 ............................................................................................. 66 持久狀態(tài)下的應(yīng)力計(jì)算 ................................................................................ 71 撓度驗(yàn)算 .................................................................................................................... 75 預(yù)拱度計(jì)算 ................................................................................................................ 77 結(jié)論 .......................................................................................................................................... 78 致謝 .......................................................................................................................................... 79 參考文獻(xiàn) .................................................................................................................................. 80