【正文】 教研室主任： I 摘要 本次設(shè)計的題目是江西省某新建預(yù)應(yīng)力 T形梁橋施工圖 （ K0+000— K1+）設(shè)計。 本文主要闡述了該橋的設(shè)計和計算過程。and make an overall structure design of the main perform the calculation of the internal force and reinforcing bar on the ,check the intensity,stress and ,check the substructure.. The main points of the design are as the follows. introduce of design。 arrangement of prestressed reinforcing bar。uabutme 目錄 摘要 ........................................................................................................................ I Abstract ................................................................................................................ II 第一章 設(shè)計說明 .............................................................................................. 1 引言 ................................................................................................................................... 1 設(shè)計任務(wù)書 ....................................................................................................................... 1 題目：江西某新建橋梁施工圖設(shè)計（ K0+000— K1+） ............................ 1 畢業(yè)設(shè)計使用的原始資料（數(shù)據(jù)）及設(shè)計技術(shù)要求 ......................................... 1 第二章 設(shè)計資料與結(jié)構(gòu)尺寸 ............................................................................ 1 設(shè)計資料 ........................................................................................................................... 1 橋梁跨徑及橋?qū)? ..................................................................................................... 1 設(shè)計荷載 ................................................................................................................. 1 材料特性 ................................................................................................................. 1 錨具 ......................................................................................................................... 1 施工工藝 ................................................................................................................. 1 設(shè)計依據(jù) ................................................................................................................. 1 結(jié)構(gòu)設(shè)計 ........................................................................................................................... 1 主梁間距與主梁片數(shù) ............................................................................................. 1 主梁尺寸擬定 ......................................................................................................... 4 第三章 主梁內(nèi)力計算 ....................................................................................... 11 恒載內(nèi)力計算 ................................................................................................................. 11 第一期恒載 ........................................................................................................... 11 二期恒載 ............................................................................................................... 11 第三 期荷載 ........................................................................................................... 11 橫載內(nèi)力計算 ....................................................................................................... 12 活載內(nèi)力計算 ................................................................................................................. 16 沖擊系數(shù)和車道折減系數(shù) ................................................................................... 16 主梁荷載橫向分布系數(shù)計算 ............................................................................... 16 計算活載內(nèi)力 ....................................................................................................... 20 第四章 預(yù)應(yīng)力鋼筋面積的估算及其布置 .......................................................... 24 初選鋼束 .......................................................................................................................... 24 估算預(yù)應(yīng)力鋼筋面積 ............................................................................................ 24 構(gòu)造布置要求 ................................................................................................................. 25 確定跨中及錨固端截面的鋼束位置 ................................................................... 25 鋼束的彎起角和線形位置的確定 ................................................................................. 25 鋼束的幾何計算 ............................................................................................................. 25 力筋長度計算 ........................................................................................................ 26 力筋的高度計算 .................................................................................................... 27 主梁截面幾何特性計算 .................................................................................................. 28 第五章 承載力極限狀態(tài)設(shè)計 ............................................................................. 32 跨中截面尺寸及配筋情況 ............................................................................................. 32 斜截面承載力計算 ......................................................................................................... 32 距支點 h/2 截面抗剪承載力計算 ......................................................................... 32 變化點截面抗剪承載力計算 ................................................................................ 33 第六章 預(yù)應(yīng)力損失計算 ..................................................................................... 35 摩阻損失 ......................................................................................................................... 35 錨具變形損失 ................................................................................................................. 36 混凝土彈性壓縮引起的預(yù)應(yīng)力損失 .............................................................................. 37 由預(yù)應(yīng)力鋼筋應(yīng)力松弛引起的預(yù) 應(yīng)力損失 .................................................................. 40 鋼束預(yù)應(yīng)力損失匯總 ....