【正文】 應(yīng)力技術(shù)水平。如 孟買的第二勃溪大橋 ,是一座主跨 為 的雙塔雙索面預(yù)應(yīng)力混凝土斜拉橋 [3]。將使當(dāng)?shù)氐慕煌ǜ臃奖憧旖?，有利于兩岸的?jīng)濟(jì)、文化等方面的交流，給當(dāng)?shù)匾约爸苓呡椛涞貐^(qū)的經(jīng)濟(jì)發(fā)展和人民生活帶來(lái)極大的便利，對(duì)促進(jìn)經(jīng)濟(jì)發(fā)展、改善人民群眾物質(zhì)和文化生活起到積極作用。 the fourth part of the design and construction scheme. After checking the design, construction technology, the reasonable requirements, design is feasible. Keywords: The prestressed concrete。本科生畢業(yè)設(shè)計(jì) 目 錄 摘要 ......................................................................................................................................... I Abstract ................................................................................................................................ II 第 1 章 緒論 ..................................................................................................................... 1 選題的目的及意義 .................................................................................................... 1 國(guó)內(nèi)外研究狀況 ........................................................................................................ 1 工程概況 .................................................................................................................... 2 技術(shù)標(biāo)準(zhǔn)和設(shè)計(jì)依據(jù) ................................................................................................ 2 技術(shù)標(biāo)準(zhǔn) ......................................................................................................... 2 設(shè)計(jì)依據(jù) ......................................................................................................... 2 結(jié)構(gòu)形式 .................................................................................................................... 2 主要材料規(guī)格 ............................................................................................................ 2 施工要點(diǎn) .................................................................................................................... 3 上部結(jié)構(gòu)施工要點(diǎn) ......................................................................................... 3 下部結(jié)構(gòu)施工要點(diǎn) ......................................................................................... 4 第 2 章 水文計(jì)算 .............................................................................................................. 5 水面寬度及過(guò)水面積的計(jì)算 .................................................................................... 5 流量及流速的計(jì)算 .................................................................................................... 6 橋孔長(zhǎng)度計(jì)算 ............................................................................................................ 7 橋孔長(zhǎng)度的確定 ............................................................................................. 7 橋墩中心樁號(hào)的確定 ..................................................................................... 7 橋面中心最低標(biāo)高的確定 ........................................................................................ 7 橋梁沖刷計(jì)算 ............................................................................................................ 7 一般沖刷深度計(jì)算 ......................................................................................... 8 局部沖刷深度計(jì)算 ....................................................................................... 10 本章小結(jié) .................................................................................................................. 11 第 3 章 上部結(jié)構(gòu)一般設(shè)計(jì) .......................................................................................... 12 本科生畢業(yè)設(shè)計(jì) 設(shè)計(jì)資料及構(gòu)造布置 .............................................................................................. 12 設(shè)計(jì)資料 ....................................................................................................... 12 橫截面布置 ................................................................................................... 12 主梁主要截面幾何特性計(jì)算 ....................................................................... 13 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 ............................................................................................... 18 主梁內(nèi)力組合 ............................................................................................... 33 配筋計(jì)算 .................................................................................................................. 35 預(yù)應(yīng)力鋼筋數(shù)量的確定及布置 ................................................................... 35 普通鋼筋數(shù)量的確定及布置 ....................................................................... 38 各階段截面幾何性質(zhì)計(jì)算 ...................................................................................... 38 截面承載能力極限狀態(tài)計(jì)算 .................................................................................. 40 跨中截面正截面承載力計(jì)算 ....................................................................... 40 斜截面抗剪承載力計(jì)算 ............................................................................... 41 預(yù)應(yīng)力損失計(jì)算 ...................................................................................................... 44 鋼束應(yīng)力損失 ............................................................................................... 44 預(yù)應(yīng)力損失值組合 ....................................................................................... 50 正常使用極限狀態(tài)計(jì)算 .......................................................................................... 50 抗裂性驗(yàn)算 ................................................................................................. 50 變形計(jì)算 ..................................................................................................... 54 持久狀 況的主應(yīng)力驗(yàn)算 .......................................................................................... 56 跨中截面混凝土法向正應(yīng)力驗(yàn)算 ............................................................... 56 跨中截面預(yù)應(yīng)力鋼筋拉應(yīng)力驗(yàn)算 ............................................................... 57 斜