橋梁工程畢業(yè)設(shè)計(jì)

1、摘 要在本設(shè)計(jì)中，根據(jù)參考圖紙的要求，依據(jù)現(xiàn)行鐵路橋梁設(shè)計(jì)規(guī)范提出了預(yù)應(yīng)力混凝土連續(xù)梁橋、預(yù)應(yīng)力混凝土連續(xù)剛構(gòu)、簡支梁橋三種橋型方案。按照“實(shí)用、經(jīng)濟(jì)、安全、美觀”的橋梁設(shè)計(jì)原則，經(jīng)過對各種橋型的比選最終選擇 48m+80m+48m 的預(yù)應(yīng)力混凝土連續(xù)梁橋?yàn)楸敬蔚耐扑]設(shè)計(jì)橋型。 本設(shè)計(jì)利用 Midas 軟件進(jìn)行結(jié)構(gòu)分析，根據(jù)橋梁的尺寸擬定建立橋梁基本模型，然后進(jìn)行內(nèi)力分析，計(jì)算配筋結(jié)果，進(jìn)行施工各階段分析及截面驗(yàn)算。同時，必須要考

2、慮混凝土收縮、徐變次內(nèi)力和溫度次內(nèi)力等因素的影響。本設(shè)計(jì)主要是預(yù)應(yīng)力混凝土連續(xù)梁橋的上部結(jié)構(gòu)設(shè)計(jì)，設(shè)計(jì)中主要進(jìn)行了橋梁總體布置及結(jié)構(gòu)尺寸擬定、橋梁荷載內(nèi)力計(jì)算、橋梁預(yù)應(yīng)力鋼束的估算與布置、橋梁預(yù)應(yīng)力損失及應(yīng)力的驗(yàn)算、次內(nèi)力的驗(yàn)算、內(nèi)力組合驗(yàn)算、主梁截面應(yīng)力驗(yàn)算。最后，經(jīng)過分析驗(yàn)算表明該設(shè)計(jì)計(jì)算方法正確，內(nèi)力分布合理，符合設(shè)計(jì)任務(wù)的要求。關(guān)鍵字：連續(xù)梁橋；連續(xù)剛構(gòu)；簡支梁橋；結(jié)構(gòu)分析；驗(yàn)算AbstractIn this design, a

3、ccording to the referencing drawings requirements，according to the current Railway bridge design specification of prestressed concrete continuous girder bridge forward, Prestressed concrete continuous rigid-frame structu

4、re, simple supported girder bridge. According to the “practical, beautiful, safe, economic and convenient for construction of bridge design principles, structure after the bridge of various final choice of 48m + 80 + 48m

5、 prestressed concrete continuous girder bridge design for this recommendation.This design using the Midas software analysis the structure，according to the size of the bridge, the basic model establishment bridge worked，t

6、hen force analysis，calculation 1. 概述...........................................................................................................................................................41. 1 預(yù)應(yīng)力混凝土連續(xù)梁橋概述...........

7、..............................................................................................41. 2 技術(shù)標(biāo)準(zhǔn)....................................................................................................................

8、.....................51. 3 橋址處自然條件.............................................................................................................................61. 4 采用材料...................................................

9、......................................................................................71. 5 設(shè)計(jì)規(guī)范及標(biāo)準(zhǔn).........................................................................................................................

10、....82. 方案比選...................................................................................................................................................82. 1 構(gòu)思宗旨...................................................

11、.......................................................................................82. 2 比選標(biāo)準(zhǔn)...........................................................................................................................

12、..............82. 3 設(shè)計(jì)方案.........................................................................................................................................82.3.1 設(shè)計(jì)方案一: 變截面預(yù)應(yīng)力混凝土連續(xù)梁橋 ...............................

13、..................................82.3.2 設(shè)計(jì)方案二：預(yù)應(yīng)力混凝土連續(xù)剛構(gòu)橋 .......................................................................102.3.3 設(shè)計(jì)方案三：預(yù)應(yīng)力混凝土簡支梁橋 .................................................................

14、..........112. 4 方案比選結(jié)果...............................................................................................................................123. 截面尺寸擬定和主梁施工階段的劃分.................................................

15、................................................133.1 設(shè)計(jì)特點(diǎn)及受力特點(diǎn)....................................................................................................................133.1.1 設(shè)計(jì)特點(diǎn).............................

16、..............................................................................................133.1.2 受力特點(diǎn)..................................................................................................................

17、.........143.2 截面形式及截面尺寸.....................................................................................................................143.2.1 主截面....................................................................

18、...........................................................143.2.2 橫截面...............................................................................................................................143.2.3 腹板和其它細(xì)部構(gòu)造......

19、.................................................................................................153. 3 毛截面結(jié)合特性計(jì)算...........................................................................................................

20、........163. 4 主梁分段與施工階段劃分...........................................................................................................173.4.1 分段原則...........................................................................

21、.................................................173.4.2 具體分段............................................................................................................................173.4.3 主梁施工方法及注意事項(xiàng)................

22、................................................................................174. 主梁作用效應(yīng)計(jì)算...............................................................................................................................

23、..194.1 恒載內(nèi)力計(jì)算.................................................................................................................................194.2 活載內(nèi)力計(jì)算.................................................................

24、...............................................................204.3 溫差次內(nèi)力及支座沉降次內(nèi)力計(jì)算............................................................................................234.3.1 溫差應(yīng)力計(jì)算..............................

25、......................................................................................234.3.2 支座沉降計(jì)算....................................................................................................................254.

26、4 內(nèi)力組合.........................................................................................................................................265. 預(yù)應(yīng)力鋼束的估算與布置.............................................................

27、........................................................305.1 預(yù)應(yīng)力鋼筋估算.............................................................................................................................305.2 截面鋼束用量的估算公式.........

28、....................................................................................................315.3 預(yù)應(yīng)力鋼束的布置..........................................................................................................

29、...............336. 預(yù)應(yīng)力損失與有效預(yù)應(yīng)力計(jì)算.............................................................................................................366.1 基本理論....................................................................

30、....................................................................366.2 預(yù)應(yīng)力損失計(jì)算............................................................................................................................366.3 主梁截面幾何特性.

31、.......................................................................................................................387. 截面驗(yàn)算............................................................................................