【正文】 .........................................................................................................................................II目 錄 ........................................................................................................................................................III1 初步設(shè)計 ...............................................................................................................................................1 設(shè)計基本資料 ................................................................................................................................1 設(shè)計標(biāo)準 .................................................................................................................................1 主要資料 .................................................................................................................................1 相關(guān)參數(shù)................................................................................................................................2 預(yù)應(yīng)力布置............................................................................................................................2 施工方式................................................................................................................................2 設(shè)計規(guī)范................................................................................................................................2 橋梁方案設(shè)計...............................................................................................................................2 總則........................................................................................................................................2 連續(xù)梁施工方案的選擇（比選）........................................................................................2 結(jié)構(gòu)構(gòu)造尺寸........................................................................................................................32 上部結(jié)構(gòu)設(shè)計與計算 ...........................................................................................................................5 橋梁原橫截面特性計算 ................................................................................................................5 截面特性的計算 .....................................................................................................................5 檢驗截面效率指標(biāo) ρ（希望 ρ在 以上）........................................................................7 橋面板的計算和梁有效寬度的計算............................................................................................7 橋面 板的 計算........................................................................................................................7 梁有效寬度的計算................................................................................................................7 主梁內(nèi)力計算..............................................................................................................................10 活載內(nèi)力計算..............................................................................................................................12 沖擊系數(shù)計算......................................................................................................................12 求主梁抗彎慣性矩 IT（扭轉(zhuǎn)虎克定律） ..........................................................................13 汽車荷載內(nèi)力計算（結(jié)構(gòu)力學(xué)求解器計算）..................................................................14 人群荷載內(nèi)力計算..............................................................................................................21 內(nèi)力組合(取截面最大值組合 )...................................................................................................29 承載力極限狀態(tài)的基本組合..............................................................................................29 作用短期效應(yīng)組合..............................................................................................................30 作用長期效應(yīng)組合..............................................................................................................30 預(yù)應(yīng)力鋼筋配筋計算..................................................................................................................31 構(gòu)件承載能力極限狀態(tài)要求估算非預(yù)應(yīng)力鋼筋的數(shù)量..................................................33 小配筋率的要求..................................................................................................................37 預(yù)應(yīng)力鋼筋的選用..............................................................................................................37 有效截面的截面特性..........................................................................................................37目錄IV 具體的預(yù)應(yīng)力鋼筋布置......................................................................................................39目錄V 縱向預(yù)應(yīng)力筋彎起設(shè)計.......................................................................................................39 預(yù)應(yīng)力損失及有效預(yù)應(yīng)力的計算...............................................................................................41 摩擦預(yù)應(yīng)力損失...................................................................................................................41 錨具變形和鋼筋回縮損失...................................................................................................42 鋼筋與臺座之間的溫差引起的預(yù)應(yīng)力損失.......................................................................43 混凝土的彈性壓縮引起的應(yīng)力損失...................................................................................43 鋼束松弛損失.......................................................................................................................44 收縮徐變損失.......................................................................................................................45 有效預(yù)應(yīng)力的計算...............................................................................................................46 持久狀況承載力極限狀態(tài)驗算...................................................................................................47 正截面抗彎承載力驗算............................