土木工程論文編號(hào):TM001    論文字?jǐn)?shù):22593,頁(yè)數(shù):104

目 錄
第1章　概　述........................................................................ 1
1.1 設(shè)計(jì)資料........................................................................  1
1.1.1 設(shè)計(jì)資料及構(gòu)造布置 .............................................................1
1.1.2 施工方法 .......................................................................2
1.1.3 設(shè)計(jì)依據(jù) .......................................................................2
1.2 設(shè)計(jì)特點(diǎn)........................................................................  2
第2章 橋梁結(jié)構(gòu)總體布置................................................................4
2.1 立面布置........................................................................  4
2.2 截面布置........................................................................  4
2.2.1 截面形式........................................................................4
2.2.2 主梁跨中截面主要尺寸擬定........................................................4
2.2.3 主梁間距和主梁片數(shù)..............................................................5
2.2.4 橫截面沿跨長(zhǎng)的變化..............................................................6
2.2.5 橫隔梁的設(shè)置 ...................................................................6
2.2.6 主梁尺寸計(jì)算....................................................................7
第3章 結(jié)構(gòu)內(nèi)力計(jì)算....................................................................12
3.1 主梁內(nèi)力計(jì)算 .....................................................................12
3.1.1 預(yù)制主梁自重（第一期恒載）......................................................12
3.1.2第二期恒載.......................................................................13
3.2 活載內(nèi)力計(jì)算 .....................................................................14
3.2.1 活載沖擊系數(shù)....................................................................14
3.2.2 車道折減系數(shù)....................................................................14
3.2.3 計(jì)算活載內(nèi)力 ...................................................................19
第4章 預(yù)應(yīng)力鋼束估算及其布置 .........................................................24
4.1預(yù)應(yīng)力鋼束的估算 ..................................................................24
4.1.1鋼絞線及錨具 ....................................................................24
4.1.2 跨中截面的鋼束估算與確定........................................................24
4.1.3 支點(diǎn)截面所需抵抗負(fù)彎矩的上部預(yù)應(yīng)力鋼束的估算結(jié)合確定 ...........................25
4.2 預(yù)應(yīng)力鋼束的布置 .................................................................26
4.2.1 連續(xù)梁預(yù)應(yīng)力鋼束的配置原則......................................................26
4.2.2 跨中截面鋼束布置 ...............................................................27
4.2.3 錨固截面的鋼束布置..............................................................27
4.2.4 鋼束起彎角和線形的確定 .........................................................28
4.3 鋼束計(jì)算..........................................................................29
4.3.1鋼束起彎點(diǎn)到跨中截面的距離計(jì)算 ..................................................29
4.3.2 控制截面的鋼束重心位置計(jì)算......................................................29
4.3.3 鋼束長(zhǎng)度計(jì)算....................................................................31
第5章 計(jì)算主梁截面幾何特性............................................................33
5.1 截面面積及慣矩計(jì)算................................................................33
5.1.1 凈截面幾何特性計(jì)算..............................................................33
5.1.2 換算截面幾何特性計(jì)算............................................................33
5.2 各階段截面對(duì)重心軸的靜矩計(jì)算......................................................36
第6章 次內(nèi)力的計(jì)算....................................................................43
第7章 鋼筋預(yù)應(yīng)力損失計(jì)算..............................................................45
7.1 預(yù)應(yīng)力鋼筋與管道壁之間的摩擦......................................................45
7.2 由錨具變形、鋼筋回縮和接縫壓縮引起的預(yù)應(yīng)力損失（考慮反摩擦）......................46
7.3 混凝土的彈性壓縮損失..............................................................48
7.4 由預(yù)應(yīng)力鋼筋松弛引起的應(yīng)力損失....................................................49
7.5 混凝土的收縮和徐變引起的損失......................................................50
第8章 主梁截面強(qiáng)度與應(yīng)力驗(yàn)算..........................................................53
8.1 持久狀況承載能力極限狀態(tài)計(jì)算......................................................53
8.1.1 正截面抗彎承載能力驗(yàn)算..........................................................53
8.1.2 斜截面抗彎強(qiáng)度驗(yàn)算..............................................................59
8.1.3 斜截面抗剪承載力驗(yàn)算 ...........................................................59
8.1.4 局部承壓驗(yàn)算 ...................................................................64
8.2 持久狀態(tài)正常使用極限狀態(tài)計(jì)算......................................................66
8.2.1 抗裂驗(yàn)算........................................................................66
8.2.2 撓度驗(yàn)算 .......................................................................74
8.3 持久狀況構(gòu)件的應(yīng)力計(jì)算............................................................76
8.3.1 受壓區(qū)混凝土最大壓應(yīng)力和受拉區(qū)預(yù)應(yīng)力鋼筋最大拉應(yīng)力驗(yàn)算..........................76
8.3.2 混凝土的主壓應(yīng)力驗(yàn)算............................................................83
第9章 行車道板計(jì)算....................................................................85
9.1 懸臂板荷載效應(yīng)計(jì)算 ...............................................................85
9.1.1 恒載效應(yīng)........................................................................85
9.1.2 活載效應(yīng)........................................................................87
9.2 連續(xù)板荷載計(jì)算....................................................................88
9.2.1 恒載效應(yīng)........................................................................88
9.2.2 活載效應(yīng)........................................................................90
9.2.3 荷載組合........................................................................92
9.3 截面設(shè)計(jì)配筋與強(qiáng)度驗(yàn)算 ...........................................................92
致 謝.................................................................................94
參考文獻(xiàn) .............................................................................95
附 錄 1...............................................................................96
附 錄2 ..............................................................................102
第1章　概　述
1.1 設(shè)計(jì)資料
題目：7*30m公路預(yù)應(yīng)力混凝土連續(xù)梁橋上部結(jié)構(gòu)設(shè)計(jì)
1.1.1 設(shè)計(jì)資料及構(gòu)造布置
1. 設(shè)計(jì)資料
橋孔布置形式：7-30=210m
標(biāo)準(zhǔn)跨徑：30m；梁長(zhǎng)：29.90m；計(jì)算跨徑：29.20m
橋?qū)挘簽榉蛛x式 左右幅均為12.25m 凈—11.25m
設(shè)計(jì)荷載：公路—Ⅰ級(jí)