【正文】 西北民族大學(xué)土木工程學(xué)院 20m 裝配式預(yù)應(yīng)力混凝土簡(jiǎn)支 T 形梁橋 20 米裝配式預(yù)應(yīng)力混凝土簡(jiǎn)支 T 形梁橋設(shè)計(jì)畢業(yè)論文目 錄1 .設(shè)計(jì)資料及構(gòu)造布置 .............................................................................................................................................1 設(shè)計(jì)資料 ...........................................................................................................................................................1 ..............................................................................................................................................................3 主梁間距與主梁片數(shù) ...................................................................................................................................... 3 主梁跨中截面主要尺寸擬訂 ...........................................................................................................................33．主梁作用效應(yīng)計(jì)算 ...............................................................................................................................................7 永久作用效應(yīng)計(jì)算 ...........................................................................................................................................7 可變作用效應(yīng)計(jì)算 .........................................................................................................................................10 車道荷載的取值 .............................................................................................................................................18 計(jì)算可變作用效應(yīng) .........................................................................................................................................19 溫度荷載計(jì)算 .................................................................................................................................................24 .........................................................................................................................................25 主梁內(nèi)力包絡(luò)圖 .............................................................................................................................................264 預(yù)應(yīng)力鋼束的估算及其布置 ................................................................................................................................26 跨中截面鋼束的估算和確定 .........................................................................................................................26 預(yù)應(yīng)力鋼束布置 .............................................................................................................................................27 鋼束計(jì)算 .........................................................................................................................................................305 計(jì)算主梁截面幾何特性 ........................................................................................................................................34 截面面積及慣矩計(jì)算 .....................................................................................................................................34 換算截面幾何特性計(jì)算 .................................................................................................................................36 主梁截面特性值總表 ................................................................................................................................... 39 ............................................................................................................................................41 預(yù)應(yīng)力鋼束與管道壁之間的摩擦引起的預(yù)應(yīng)力損失 .................................................................................41 由錨具變形、鋼束回縮引起的預(yù)應(yīng)力損失 .................................................................................................42 混凝土彈性壓縮引起的預(yù)應(yīng)力損失 .............................................................................................................43 由鋼束應(yīng)力松弛引起的預(yù)應(yīng)力損失 .............................................................................................................43 混凝土收縮和徐變引起的預(yù)應(yīng)力損失 .........................................................................................................44 成橋后張拉 N3 號(hào)鋼筋混凝土彈性壓縮引起的預(yù)應(yīng)力損失 ......................................................................49 ................................................................................................................................54 持久狀況承載能力極限狀態(tài)承載力驗(yàn)算 .....................................................................................................55 .........................................................................................................62 持久狀況構(gòu)件的應(yīng)力驗(yàn)算 .............................................................................................................................70西北民族大學(xué)土木工程學(xué)院 20m 裝配式預(yù)應(yīng)力混凝土簡(jiǎn)支 T 形梁橋 短暫狀況構(gòu)件的應(yīng)力驗(yàn)算 .............................................................................................................................79 主梁端部的局部承壓驗(yàn)算 .............................................................................................................................82 主梁變形驗(yàn)算 .................................................................................................................................................86 結(jié)構(gòu)剛度驗(yàn)算 .................................................................................................................................................90 預(yù)拱度的設(shè)置 .................................................................................................................................................91 ............................................................................................................................................................91 計(jì)算跨中橫隔梁的彎矩影響線系數(shù)坐標(biāo) .....................................................................................................91