【正文】 ............................................................ 11 材料特性 ............................................................................................................................................. 11 單元特性 ............................................................................................................................................. 12 施工荷載 ............................................................................................................................................. 12 二期恒載 ............................................................................................................................................. 12 計算模型 ............................................................................................................................................. 12 恒載計算結(jié)果 ..................................................................................................................................... 13 活載內(nèi)力計算 ............................................................................................................................................. 16 計算方法 ............................................................................................................................................. 16 活載動力系數(shù)的計算 ......................................................................................................................... 16 第 4 章 預應(yīng)力鋼束設(shè)計 ........................................................................................................... 19 預 應(yīng)力鋼束估算 ......................................................................................................................................... 19 計算原理 ............................................................................................................................................. 19 預應(yīng)力鋼束估算 ................................................................................................................................. 23 西南交通大學本科畢業(yè)設(shè)計 （論文） 第 X 頁 縱向向預應(yīng)力鋼束布置 ............................................................................................................................. 24 縱向預應(yīng)力鋼束的受力特點 ............................................................................................................ 24 縱向預應(yīng)力鋼束布置原則 ................................................................................................................ 25 縱向預應(yīng)力束的布置 ......................................................................................................................... 25 豎向預應(yīng)力鋼束布置 ................................................................................................................................. 26 橫向預應(yīng)力鋼束布置 ................................................................................................................................. 26 普通鋼筋的布置 ......................................................................................................................................... 27 第 5 章 截面特性計算 ............................................................................................................... 28 計算原理 ...................................................................................................................................................... 28 凈截面幾何特性 ................................................................................................................................. 28 換算截面幾何特性 ............................................................................................................................. 29 截面幾何特性計算 ..................................................................................................................................... 30 第 6 章 預應(yīng)力損失及有效應(yīng)力 ................................................................................................. 32 管道摩阻損失 ............................................................................................................................................. 32 錨具變形損失 ............................................................................................................................................. 33 混凝土彈性壓縮損失 ................................................................................................................................. 33 預應(yīng)力鋼筋應(yīng)力松弛損失 ......................................................................................................................... 34 混凝土的收縮徐變損失 ............................................................................................................................. 34 關(guān)鍵截面預應(yīng)力損失計算 ......................................................................................................................... 35 第 7 章 次內(nèi)力計算 .................................................................................................................. 38 預加力次內(nèi) 力計算 ..................................................................................................................................... 38 混凝土徐變次內(nèi)力計算 ............................................................................................................................. 42 溫度次內(nèi)力計算 ......................................................................................................................................... 43 溫度對結(jié)構(gòu)的影響 ............................................................................................................................. 43 結(jié)構(gòu)溫度場的確定 ............................................................................................................................. 43 基礎(chǔ)沉降次內(nèi)力計算 ................................................................................................................................. 45 第 8 章 內(nèi)力組合計算 ............................................................................................................... 47 荷載的分類 .................................................................