【正文】 ......................................... ABSTRACT AND KEYWORDS ................................................................................... ABSTRACT: ............................................................................................................. Keywords: ................................................................................................................. 第 1 章 緒論 .................................................................................................................. 1 鋼橋的主要特點(diǎn)及適用范圍 ......................................................................... 1 我國(guó)鋼橋發(fā)展根況 .......................................................................................... 1 鋼橋的主要結(jié)構(gòu)形式 ...................................................................................... 2 梁式體系 ................................................................................................... 2 拱式體系 ................................................................................................... 2 組合體系 ................................................................................................... 2 本設(shè)計(jì)的主要研究?jī)?nèi)容 .................................................................................. 3 第 2 章 水文計(jì)算 .......................................................................................................... 5 黎湛線某橋位水文計(jì)算設(shè)計(jì)資料 .................................................................. 5 設(shè)計(jì)水位和通航水位、設(shè)計(jì)流量 .................................................................. 5 含特大洪水系列的頻率分析計(jì)算設(shè)計(jì)水位、通航水位 ................................. 6 設(shè)計(jì)水位： ............................................................................................... 8 .................................................................................................. 10 ......................................................................... 10 橋下孔徑 ........................................................................................................ 11 非粘性土橋下河槽的一般沖刷 .................................................................... 12 粘性土河灘一般沖刷 .................................................................................... 13 局部沖刷 ........................................................................................................ 14 橋墩基礎(chǔ)埋至深度計(jì)算 ................................................................................ 15 第 3 章 方案比選 ........................................................................................................ 16 概述 ................................................................................................................. 16 橋址概況 .................................................................................................. 16 主要技術(shù)標(biāo)準(zhǔn) ........................................................................................... 16 橋型選擇的基本原則 ............................................................................... 16 連續(xù)鋼桁梁方案（ 2ⅹ 24+32+3ⅹ 90+32+2ⅹ 24） m .................................. 16 總體設(shè)計(jì) .................................................................................................. 16 主桁結(jié)構(gòu) .................................................................................................. 17 預(yù)應(yīng)力混凝土變高度連續(xù)剛構(gòu)橋設(shè)計(jì)方案（ 72+90+90+90+72m） ....... 18 總體設(shè)計(jì) .................................................................................................. 18 梁體設(shè)計(jì) .................................................................................................. 18 主橋墩設(shè)計(jì) .............................................................................................. 18 施工方法： 懸臂法施工 ............................................................................. 18 連續(xù)鋼桁拱 桁梁組合結(jié)構(gòu) (100+250+100)m .............................................. 19 中南大學(xué)本科畢 業(yè)設(shè)計(jì) 目錄 總體設(shè)計(jì) .................................................................................................. 19 橫斷面設(shè)計(jì) .............................................................................................. 20 主桁構(gòu)件設(shè)計(jì) ........................................................................................... 20 橋墩設(shè)計(jì) .................................................................................................. 21 施工方法：懸臂施工 ................................................................................ 21 橋式方案推薦意見(jiàn) ........................................................................................ 21 第 4 章 主桁桿件設(shè)計(jì) ................................................................................................ 23 概述 ................................................................................................................. 23 設(shè)計(jì)資料 .................................................................................................. 23 主桁桿件設(shè)計(jì)方法及過(guò)程 ............................................................................ 24 桿件控 制內(nèi)力的計(jì)算 .................................................................................... 25 計(jì)算模型 .................................................................................................. 25 算法設(shè)計(jì)概述 ........................................................................................... 25 矩陣位移法概述 ............................................................................................ 25 矩陣位移法具體過(guò)程 .................................................................................... 26 結(jié)構(gòu)離散化： ........................................................................................... 26 單元分析 .................................................................................................. 27 整體分析 .................................................................................................. 30 位移邊界條件的引入 ................................................................................ 31 求解結(jié)構(gòu)剛度方程 ................................