【正文】 ....... 68 截面作用效應(yīng)計(jì)算 ...................................................................... 71 截面配筋計(jì)算 ............................................................................. 72 行車道板計(jì)算 ................................................................................... 72 懸臂板（邊梁）荷載效應(yīng)計(jì)算 ................................................. 72 連續(xù)板荷載效應(yīng)計(jì)算 ................................................................. 74 行車道板截面設(shè)計(jì)、配筋與承載力驗(yàn)算 ................................. 76 支座的選取 .................................................................................... 78 第 2 章 橋梁下部結(jié)構(gòu)及基礎(chǔ)計(jì)算 .................................................................. 79 下部結(jié)構(gòu)及基礎(chǔ)布置 ........................................................................ 79 設(shè)計(jì)標(biāo)準(zhǔn)及上部構(gòu)造 .................................................................. 79 水文地質(zhì)條件 .............................................................................. 79 橋墩尺寸 .......................................................................................79 材料 ...............................................................................................80 設(shè)計(jì)依據(jù) .......................................................................................80 蓋梁計(jì)算 .............................................................................................80 荷載計(jì)算 .......................................................................................80 內(nèi)力計(jì)算 .......................................................................................89 截面配筋設(shè)計(jì)與承載力校核 .......................................................91 橋墩墩柱設(shè)計(jì) .....................................................................................93 荷載計(jì)算 .......................................................................................93 截面配筋設(shè)計(jì)及應(yīng)力驗(yàn)算 ...........................................................96 鉆孔樁設(shè)計(jì) .........................................................................................98 荷載計(jì)算 ......................................................................................98 樁長(zhǎng)計(jì)算 .....................................................................................100 樁的內(nèi)力計(jì)算（ m 法） ...........................................................101 樁身截面配筋與承載力驗(yàn)算 ....................................................103 墩頂縱向水平位移驗(yàn)算 .............................................................104 結(jié)論 ...................................................................................................................106 參考文獻(xiàn) ...........................................................................................................107 致謝 ...................................................................................................................108 第 1 章 橋梁上部結(jié)構(gòu)計(jì)算 設(shè)計(jì)資料及構(gòu)造布置 設(shè)計(jì)資料 1．橋梁跨徑橋?qū)? 標(biāo)準(zhǔn)跨徑： 45m（墩中心距離）； 主梁全長(zhǎng)： ； 計(jì)算跨徑： ； 橋面凈空：凈 —9m+2 = 2．設(shè)計(jì)荷載 公路 Ⅰ 級(jí)，人群荷載 ，每側(cè)人行柱、防撞欄重力作用分別為 。 關(guān)鍵詞 預(yù)應(yīng)力混凝土 ； 簡(jiǎn)支梁橋 ； 橋墩 ； 重力式橋臺(tái) ； 鉆孔灌注樁 Abstract Bridge is one of the most important traffic facilities,the design is about a reinforce concrete simply supported gieder bridge, that has Four bridge deck slab’s breadth is 9+2 meter ,The clearance under bridge superstructure is 5 meter and each span to 45 design is three parts as follows:(1) the design of deck all of the factors,we decided use of prestressed bridge Tsimple prestressed bridge has mang good qualities,such as it has small weight when installed, it is very simply when not use so much is suitable for the small bridge deck slab is posed of 5 Tsimple beams,and the hollow slab is wideth, meter heigh and the load is not simple,the bridge deck slab’scalauation,using the method of changing the space problem into plane design problem to draw we have to introduce the transverse load distribution loads that imposedon the bridge are as follows: constructure gravity prestressing soil gravity,concrete structure’s shrinkage and creep that casued influence force,the car load and impact force,trailer load pedestrian load and lateral earth basic principle is that we neglect the link effect of the transversal constraction between the main supposed the bridge deck slab as simplysupported girder that is supported on the main draw the influence line that which point is the most adverse,from witch we can know the transverse load foundation’s sedimentation,to ensure it suit to the require of the bridge’s underside structure is installed under the foundation soil,its main use is to support the upside structure and transfer the load from the upside structure to the require of the standard. Keywords Reinforce concrete。畫(huà)出最不利位置的影響線，據(jù)影響線得到橫向分布系數(shù) M，取最大的橫向分布系數(shù)作為主梁的控制設(shè)計(jì)。橋面荷載計(jì)算鑒于作用于橋面上荷載的復(fù)雜性，目前廣泛采用的辦法是將空間問(wèn)題轉(zhuǎn)化為平面問(wèn)題求解。橋面凈寬 9+2 米，橋下凈空 5 米，跨徑為 45 米。本設(shè)計(jì)為四跨預(yù)應(yīng)力混凝土簡(jiǎn)支橋梁。橋面采用 5 片寬度為 米，梁高為 米，跨度為 米的預(yù)應(yīng)力 T型梁?；驹硎羌俣ê雎灾髁褐g橫向結(jié)構(gòu)的聯(lián)系作用，橋面板視為沿橫向支撐在主梁上的簡(jiǎn)支梁。對(duì)基礎(chǔ)需要進(jìn)行基礎(chǔ)底面應(yīng)力驗(yàn)算和基礎(chǔ)沉降計(jì)算 ,以保證其滿足規(guī)范要求 。 gravity abutment。 按后張法施工工藝制作主梁，采用內(nèi)徑 70mm、外徑 77mm 的預(yù)埋波紋管和夾片錨具。tkff MPaMPa 持久狀態(tài) 標(biāo)準(zhǔn)荷載組合 容許壓應(yīng)力 容許主壓應(yīng)力 短期效應(yīng)組合 容許拉應(yīng)力 容許主拉應(yīng)力 ckckst pctkfff??? MPaMPaMPaMPa 0 ? 鋼 絞 線 標(biāo)準(zhǔn)強(qiáng)度 彈性模量 抗拉設(shè)計(jì)強(qiáng)度 最大控制應(yīng)力 con? pkppdpkfEff MPaMPaMPaMPa 51860 1012601395? 持久狀態(tài)應(yīng)力 標(biāo)準(zhǔn)荷載組合 MPa 1209 料 重 度 鋼筋混凝土 瀝青混凝土 鋼絞線 123??? 333kN/mkN/mkN/m 鋼筋與混凝土的彈性模量比 Ep? 無(wú)量綱 橫截面布置 1．主梁間距與主梁片數(shù) 主梁間距通常應(yīng)隨梁高與跨徑的增大而加寬為經(jīng)濟(jì) ,同時(shí)加寬翼板對(duì)提高主梁截面效率指標(biāo) ? 很有效，故在許可條件下應(yīng)適當(dāng)加寬 T 梁翼板。當(dāng)建筑高度不受限制時(shí)，增大梁高往往是較經(jīng)濟(jì)的方案，而混凝土用量增加不多。 在預(yù)應(yīng)力混凝土梁中腹板內(nèi)主拉應(yīng)力較小，腹板的厚度一般由布置孔管的構(gòu)造決定，同時(shí)從腹板本身穩(wěn)定條件出發(fā)，腹板厚度不宜小于其高度的 1/15。 按照以上擬訂的外形尺寸，就可繪出預(yù)制梁跨中截面圖（見(jiàn)圖 ）。梁端部區(qū)段由于錨頭集中力的作用而引起較大局部應(yīng)力，也為布置錨具的需要，在距梁端 1980mm 范圍內(nèi)將腹板加厚到與馬蹄同寬。本設(shè)計(jì)在橋梁中點(diǎn) 、三分點(diǎn)、六 分點(diǎn) 和 支點(diǎn)處設(shè)置七 道橫隔梁。 永久作用效應(yīng)計(jì)算 1．永久作用集度 (1) 預(yù)制梁自重