【正文】 4 1 1 01 2 2 ?? ? ? ? ? ? ? ? ? (m4 ) T 形截面抗扭慣矩近似等于各個矩形截面的抗扭慣矩之和，即： TxI = 3iii tbc? 式中： ic —— 矩形截面抗扭慣矩剛度系數(shù)（見表 1 1）； ib ， it —— 相應(yīng)各矩形的寬度和厚度。 （ 4） 材料 鋼筋：主筋用 HRB335 鋼筋，其他選用 R235 鋼筋； 混凝土：標號 C30。 In the design of the bridge, the upper structure calculation emphatically analyses the bridge in the use of engineering zhongheng load and live load, the force of gravity coefficient and the overall volume, set in the load calculation of internal force. Using lever principle, eccentricpressed method live load transverse distribution coefficient, and using the maximum load method of live load load. The beams of the calculation, the steel, and the prestress loss of prestressed girder and phase of the section of strength and deformation calculating anchorage zone, and local strength calculation and theoretical calculation. The structure based on the double bored pile pier, using slab rubber bearings, and on the piers and pile foundation were calculated and checked. This design all design drawings adopt cad drawing, puter files, typesetting, printing and paper Keywords: Partial prestressed concrete； The beam bridge； Bored piles；Tapered anchor 3 目 錄 1 引橋計算 ............................................................... 4 設(shè)計資料 ........................................................... 5 .......................................................... 6 主梁的荷載橫向分布系數(shù) .......................................... 6 梁端剪力橫向分布系數(shù)計算（按杠桿法） ........................... 10 ....................................................... 11 永久作用效應(yīng) .................................................... 11 可變作用效應(yīng) .................................................... 13 、配筋與驗算 ..................... 18 配置主筋 ........................................................ 18 持久狀況截面承載能力極限狀態(tài)計算 ............................... 19 根據(jù)斜截面抗剪承載力進行斜筋配置 ................................ 19 箍筋配置 ........................................................ 21 斜截面抗剪承載能力驗算 .......................................... 22 持久狀況正常使用極限狀態(tài)下裂縫寬度驗算 ............................ 24 持久狀況正常使用極限狀態(tài)下的撓度驗算 .............................. 25 2 主橋計算 .............................................................. 27 ........................................................... 27 橫截面布置 ....................................................... 27 主梁間距與主梁片數(shù) .............................................. 27 主梁跨中截面主要尺寸 ............................................ 28 檢驗截面效率指標 ............................................... 29 橫截面沿跨長變化 ............................................... 30 ................................................... 31 永久作用集度 .................................................... 31 永久作用效應(yīng) ................................................... 32 可變作用效應(yīng)計算（修正剛性橫梁法） ............................. 33 主梁作用效應(yīng)組合 ............................................... 40 力鋼束的估算及其布置 ........................................... 41 跨中截面鋼筋的估算和確定 ....................................... 41 主梁截面幾何特性計算 .............................................. 45 鋼束預(yù)應(yīng)力損 失估算 ................................................ 46 預(yù)應(yīng)力鋼筋張拉（錨下）控制應(yīng)力 con? ............................. 46 鋼束應(yīng)力損失 ................................................... 47 錨具變形、鋼絲回縮引起的應(yīng)力損失 2()l? ........................... 48 預(yù)應(yīng)力鋼筋分批張拉時混凝土彈性壓縮引起的應(yīng)力損失 4()l? ........... 49 鋼筋松弛引起的預(yù)應(yīng)力損失 5()l? ................................... 50 混凝土收縮、徐變引起的損失 6()l? ................................. 50 4 主梁截面承載能力與應(yīng)力驗算 ........................................ 52 持久狀況截面承載能力極限狀態(tài)正截面承載能力計算 .................. 52 應(yīng)力驗算 ....................................................... 54 抗裂性驗算 ........................................................ 59 作用短期效應(yīng)組合作用下的正截面抗裂驗算 ......................... 59 作用短期效應(yīng)組合作用下的斜截面抗裂驗算 ......................... 59 （撓度）計算 ............................................... 60 荷載短期效應(yīng)組合下主梁撓度驗算 ................................. 61 預(yù)加應(yīng)力引起的上拱度計算 ....................................... 61 預(yù)拱度的設(shè)置 ................................................... 62 錨固區(qū)局部承壓計算 .............................................. 62 支座計算 .......................................................... 63 選定支座的平面尺寸 ............................................. 63 確定支座的厚度 ................................................ 64 驗算支座的偏轉(zhuǎn) ................................................ 64 驗算支座的抗滑穩(wěn)定性 .......................................... 65 3 鉆孔灌注樁、單排雙柱式橋墩的計算 ...................................... 66 ........................................................... 66 蓋梁計算 .......................................................... 66 荷載計算 ....................................................... 66 可變荷載計算 ................................................... 68 內(nèi)力計算 ........................................................ 74 截面配 筋設(shè)計與承載力校核 ........................................ 76 ....................................................... 77 荷載計算 ....................................................... 77 截面配筋計算及應(yīng)力驗算 ......................................... 80 鉆孔樁計算 ........................................................ 81 荷載計算 ........................................................ 81 樁長計算 ........................................................ 83 樁的內(nèi)力計算（ m法） ............................................ 83 樁身截面配筋與承載力驗算 ....................................... 85 墩頂縱向水平位移驗算 ............................................ 86 參考文獻 ................................................................ 89 致謝 .................................................................... 90 5 1 引橋計算 設(shè)計資料 （ 1） 橋面凈空 凈 — + 2。 本次畢業(yè)設(shè)計為 一級公路橋設(shè)計，橋梁分為主橋和引橋，引橋主梁用混凝土簡支T 形梁，主橋主梁選用了后張法預(yù)應(yīng)力混凝土簡支 T形梁。