平安寨大橋59.5+110+59.5m連續(xù)剛構(gòu)橋設(shè)計(jì)計(jì)算書

PAGE云陽縣黃石高鐵新城廣場路道路及管網(wǎng)工程、高鐵大道工程（二期）勘察設(shè)計(jì)平安寨大橋59.5+110+59.5m連續(xù)剛構(gòu)橋設(shè)計(jì)計(jì)算書工程編號：計(jì)算：校對：審查：核定：日期：2020年08月設(shè)計(jì)單位：59.5+110+59.5m連續(xù)剛構(gòu)橋計(jì)算書PAGE11一、概述橋梁分為左右對稱兩幅，兩幅橋之間間距0.02m。橋斷面由單箱雙室斷面組成，橋箱梁頂寬均為16.89m；墩頂箱梁高7.5m，跨中及兩端梁高3.5m（箱梁高度變化成二次拋物線形式），頂板厚0.3m，底板厚0.3~0.9m（箱梁底板厚度變化成二次拋物線形式），并在箱體角部設(shè)置腋角；外側(cè)翼緣懸挑3.0m，翼緣端部厚度0.2m，翼緣根部厚度0.6m；箱梁腹板厚度跨中為0.6m，在梁端漸變?yōu)?.9m。箱梁兩側(cè)橋臺支點(diǎn)處端橫隔梁寬2.0m，墩頂0#塊寬10.0m。除0號塊外劃分為14對梁段，16號及17號梁段為合攏段，15號梁段為現(xiàn)澆段。其中0號塊長10m，1至5號塊長3.0m，6至9號塊長3.5m，10至14號塊長4.0m，邊跨現(xiàn)澆段長9m；邊、中跨合攏段長度均為2.0m；0、1號梁段在墩頂托架上現(xiàn)澆施工，2～14號梁段采用掛籃懸臂澆筑施工，懸澆段最大節(jié)段重量為約243噸，掛藍(lán)自重（含機(jī)具和施工人員重）按100噸考慮。單幅橋面布置：4.5m（人行道）+11.5m（車行道）+1.0m（中分帶）=17.0m。箱梁混凝土強(qiáng)度等級為C55,橋梁按縱、豎、橫向配置預(yù)應(yīng)力，縱向按全預(yù)應(yīng)力混凝土構(gòu)件設(shè)計(jì)。二、計(jì)算依據(jù)1．《公路橋涵設(shè)計(jì)通用規(guī)范》（JTGD60-2015）2.《公路工程技術(shù)標(biāo)準(zhǔn)》（JTGB01-2014）3.《城市橋梁設(shè)計(jì)規(guī)范》（CJJ11-2011）4.《公路鋼筋混凝土及預(yù)應(yīng)力混凝土橋涵設(shè)計(jì)規(guī)范》（JTG3362-2018）5.《公路橋梁抗風(fēng)設(shè)計(jì)規(guī)范》（JTG/T3360-01-2018）6.《城市橋梁抗震設(shè)計(jì)規(guī)范》（CJJ166-2011）三、計(jì)算方法箱梁縱向計(jì)算按平面桿系理論，并采用“MIDAS”計(jì)算。將結(jié)構(gòu)對象作為平面梁單元劃為結(jié)構(gòu)離散圖，根據(jù)橋梁實(shí)際施工過程和方案劃分施工階段，進(jìn)行荷載組合，求得結(jié)構(gòu)在施工階段和運(yùn)營階段時的應(yīng)力、內(nèi)力和位移，按規(guī)范中所規(guī)定的各項(xiàng)容許指標(biāo)，驗(yàn)算主梁是否滿足要求。四、設(shè)計(jì)計(jì)算參數(shù)混凝土、鋼絞線等材料的彈性模量、設(shè)計(jì)抗壓（拉）強(qiáng)度參數(shù)等基本參數(shù)均按《公路鋼筋混凝土及預(yù)應(yīng)力混凝土橋涵設(shè)計(jì)規(guī)范》（JTG3362-2018）取值?；炷罜55彈性模量：3.55×104MPa容重：26.0kN/m3線膨脹系數(shù)：1.0×10-5泊松比：0.2強(qiáng)度標(biāo)準(zhǔn)值：fck＝35.5MPa；ftk＝2.74MPa強(qiáng)度設(shè)計(jì)值：fcd＝24.4MPa；ftd＝1.89MPa預(yù)應(yīng)力鋼絞線規(guī)格：1×7（七股），d＝15.2mm,15（17）根一束抗拉標(biāo)準(zhǔn)強(qiáng)度：fpk＝1860Mpa，抗拉設(shè)計(jì)強(qiáng)度：fpd＝1260Mpa彈性模量1.95×105Mpa容重：78.5kN/m3線膨脹系數(shù)：1.2×10-5，泊松比：0.3張拉控制應(yīng)力：σcon＝0.72fpk（≤0.75fpk）＝0.72×1860＝1339Mpa管道摩阻系數(shù)：μ＝0.17局部偏差系數(shù)：κ＝0.0015錨具變形、鋼筋回縮和接縫壓縮值合計(jì)：12mm（兩端張拉）松弛系數(shù)：ζ＝0.3（低松弛）恒荷載一期恒載自重：由軟件自動計(jì)算，下部齒塊：0.75×25=18.75KN/個，上部齒塊：0.83×25=20.75KN/個。二期恒載橋面布置：4.5m（人行道）+11.5m（車行道）+1.0m（中分帶）=17.0m。80mm厚瀝青+80mm厚砼：24.5×0.16×11.5=45.08KN/m人行道及防撞欄桿：9+5+4.5×（0.61+0.79）/2×0.5×25=53.38KN/m中分帶：0.53×1×25=13.25KN/m合計(jì)取111.71KN/m掛籃型式和臨時荷載掛籃按1000KN計(jì)算，合攏單側(cè)壓重350KN，作用點(diǎn)距懸臂端部0.5米。收縮徐變考慮10年（3650天）活荷載汽車：城市—A級汽車活載按,3列車隊(duì)布置，車道橫向折減0.78。另考慮活載的不均勻性，計(jì)入偏載系數(shù)1.2。汽車沖擊系數(shù)據(jù)軟件特征值計(jì)算出基本頻率后計(jì)算。溫度荷載根據(jù)連續(xù)梁的特點(diǎn)，本次計(jì)算考慮梯度溫度的影響及均勻溫差的影響，參照《公路橋涵設(shè)計(jì)通用規(guī)范》（JGJD60-2015）第4.3.10條取值，如下圖所示（反溫差為正溫差乘以-0.5）；考慮整體升溫25℃,降溫25℃計(jì)算。圖1溫度梯度計(jì)算簡圖風(fēng)荷載下部結(jié)構(gòu)計(jì)算時考慮風(fēng)荷載，風(fēng)荷載取值按照《公路橋梁抗風(fēng)設(shè)計(jì)規(guī)范》（JTG/T3360-01-2018）5.3.1條計(jì)算如下：（下圖片為舊規(guī)范，同新規(guī)范5.3.1）Vg：等效陣風(fēng)速取27.5×1.29=35.48m/sH：=5.5（梁均高）+1.1（護(hù)欄高）=6.6mCH=2.1-（17/5.5）/10=1.8計(jì)算得主梁側(cè)向每米風(fēng)荷載為：FH=0.5*1.25*35.482*1.8*6.6=9347N/m=9.35KN/m。橋墩橫向風(fēng)壓參考橫梁取值：FH=0.5*1.25*35.482*1.8*6.0=8497N/m=8.50KN/m。7．荷載組合7.1內(nèi)力組合①承載能力極限狀態(tài)內(nèi)力組合△組合I：基本組合；按規(guī)范JTGD60-2015第4.1.5條規(guī)定；按此組合驗(yàn)算結(jié)構(gòu)的承載能力極限狀態(tài)的強(qiáng)度。②正常使用極限狀態(tài)內(nèi)力組合△組合I：長期效應(yīng)組合；按規(guī)范JTGD60-2015第4.1.6條規(guī)定?！鹘M合II：短期效應(yīng)組合；按規(guī)范JTGD60-2015第4.1.6條規(guī)定；按此組合驗(yàn)算鋼筋混凝土結(jié)構(gòu)的裂縫寬度。7.2應(yīng)力組合△組合I：長期效應(yīng)組合，僅供部分預(yù)應(yīng)力A類構(gòu)件的抗裂安全驗(yàn)算（參照規(guī)范JTGD62–2004第6.3.1條），組合原則按規(guī)范JTGD60-2015第4.1.6條規(guī)定，但組合時只考慮直接作用荷載，不考慮間接作用，例如不計(jì)汽車沖擊等；符合規(guī)范JTGD62-2004第6.3.1條規(guī)定?！鹘M合II：短期效應(yīng)組合，對預(yù)應(yīng)力混凝土構(gòu)件而言是按照抗裂驗(yàn)算的要求進(jìn)行組合計(jì)算的，組合原則按規(guī)范JTGD60-2015第4.1.6條規(guī)定，并滿足規(guī)范JTGD62–2004第6.3.1條有關(guān)規(guī)定?！鹘M合III：標(biāo)準(zhǔn)組合，所有應(yīng)力組合時各種荷載的分項(xiàng)組合系數(shù)都為1.0，參與組合的荷載類型為規(guī)范JTGD60-2015第4.1.6條中短期效應(yīng)組合中規(guī)定的所有荷載類型，只是荷載分項(xiàng)系數(shù)都為1.0。各組合荷載分項(xiàng)系數(shù)根據(jù)《公路橋涵設(shè)計(jì)通用規(guī)范》取值，安全等級按一級考慮。五、結(jié)構(gòu)模型描述1．結(jié)構(gòu)計(jì)算簡圖全橋主梁共劃分成85個單元，如圖2所示：圖2結(jié)構(gòu)計(jì)算簡圖2．模擬支點(diǎn)信息（永久支撐）支點(diǎn)節(jié)點(diǎn)水平剛性豎向剛性轉(zhuǎn)動剛性2010830108711188111注：1表示具有剛性約束，0表示不具有約束3.結(jié)構(gòu)配筋描述頂板束采用15.2-15，邊跨頂板束、腹板束采用15.2-15，中跨底板束采用15.2-17，邊跨底板束采用15.2-15，鋼筋配置詳見設(shè)計(jì)圖紙。4.施工階段描述第0階段：澆筑下部橋墩構(gòu)造。第一階段：臨時支持上澆筑0#塊塊、張拉相應(yīng)鋼束，并架設(shè)懸澆掛籃。第二階段：鋼束注漿、移動掛籃。第三階段：在掛籃上對稱澆筑1#塊、張拉1#塊鋼束。第四階段：鋼束注漿、移動掛籃。第五階段：在掛籃上對稱澆筑3#塊、張拉3#塊鋼束。......第13階段：在掛籃上對稱澆筑14#塊、張拉14#塊鋼束。同時支架現(xiàn)澆邊跨現(xiàn)澆段。第14階段：拆除掛藍(lán)、在勁性合攏鋼架上澆筑合攏邊跨合攏段。第15階段：張拉底板鋼束、拆除現(xiàn)澆段支架、合攏中跨合攏段，第16階段：實(shí)施橋面二期恒載。第17階段：收縮徐變完成。六．施工階段驗(yàn)算根據(jù)施工階段劃分表中各施工工序，進(jìn)行了詳細(xì)計(jì)算。最大懸臂階段即13階段，成橋階段即17階段主梁的內(nèi)力、上下緣應(yīng)力如下。最大懸臂階段箱梁正應(yīng)力圖示最大10.5MPa，最小0.3MPa最大懸臂階段箱梁主拉應(yīng)力圖示最小-0.5MPa成橋階段箱梁正應(yīng)力圖示最大9.9MPa成橋階段箱梁主拉應(yīng)力圖示最小0.7MPa《公路鋼筋混凝土及預(yù)應(yīng)力混凝土橋涵設(shè)計(jì)規(guī)范》（JTG3362-2018）第7.2.8條：預(yù)應(yīng)力混凝土受彎構(gòu)件，在預(yù)應(yīng)力和構(gòu)件自重等施工荷載作用下截面邊緣混凝土的法向應(yīng)力應(yīng)符合下列規(guī)定：壓應(yīng)力≤0.70＝0.70×34.4（100％設(shè)計(jì)強(qiáng)度）＝24.08MPa（C55）拉應(yīng)力不應(yīng)超過1.15＝1.15×-2.74（100％設(shè)計(jì)強(qiáng)度）＝-3.15MPa（C55）從上計(jì)算，可知，橋梁施工階段應(yīng)力驗(yàn)算滿足規(guī)范要求。七、正常使用階段驗(yàn)算1.正常使用極限狀態(tài)應(yīng)力驗(yàn)算1.1使用階段正截面抗裂1.2使用階段斜腹板抗裂1.3使用階段正截面壓應(yīng)力標(biāo)準(zhǔn)值組合下截面法向壓應(yīng)力最大16.0Mpa≤17.75Mpa。1.4使用階段主壓應(yīng)力驗(yàn)算知正常使用階段，應(yīng)力驗(yàn)算滿足規(guī)范要求。八.承載能力極限狀態(tài)強(qiáng)度驗(yàn)算（1）正截面抗彎驗(yàn)算如下：承載力組合墩頂最小、大彎矩及抗力圖示墩頂最小彎矩-1235502KN·m,截面抗力-1769810KN·m,富裕量43%。中跨跨中最大彎矩211252KN·m,截面抗力258679KN·m,富裕量22%。邊跨跨中最大彎矩51388KN·m,截面抗力208482KN·m，富裕量300%。通過上述計(jì)算，知箱梁正截面抗彎承載力滿足規(guī)范要求。驗(yàn)算位置最小/最大組合名稱組成結(jié)果安全系數(shù)rMu

(kN.m)Mn

(kN.m)受壓區(qū)高度x

(m)ξb*h0

(m)2a'

(m)0.000[1]MaxcLCB4My-MaxOK99999025382.33OK01.75950.09990.000[1]MincLCB27My-MinOK99999025382.33OK01.75950.09991.000[1]MaxcLCB20My-MaxOK500.937-253.761127118.4OK0.20521.18420.10011.000[1]MincLCB8My-MinOK60.0739-2116.04127118.4OK0.20521.18420.10010.000[2]MaxcLCB22My-MaxOK500.937-253.761127118.4OK0.20521.18420.10010.000[2]MincLCB8My-MinOK60.0739-2116.04127118.4OK0.20521.18420.10011.000[2]MaxcLCB16My-MaxOK16.372310411.21170455.4OK0.1121.09830.09991.000[2]MincLCB29My-MinOK178.6235954.2716170455.4OK0.1121.09830.09990.000[3]MaxcLCB16My-MaxOK16.371410411.21170446.1OK0.1121.09830.09990.000[3]MincLCB29My-MinOK178.6138954.2716170446.1OK0.1121.09830.09991.000[3]MaxcLCB16My-MaxOK10.525316660.58175357.8OK0.11811.1390.09991.000[3]MincLCB29My-MinOK72.22252428.023175357.8OK0.11811.1390.09990.000[4]MaxcLCB16My-MaxOK10.524616660.58175345.7OK0.11811.1390.09990.000[4]MincLCB29My-MinOK72.21752428.023175345.7OK0.11811.1390.09991.000[4]MaxcLCB16My-MaxOK8.098722372.45181187.7OK0.12241.17740.09991.000[4]MincLCB29My-MinOK51.04383549.651181187.7OK0.12241.17740.09990.000[5]MaxcLCB16My-MaxOK8.098322372.45181179.4OK0.12241.17740.10.000[5]MincLCB29My-MinOK51.04153549.651181179.4OK0.12241.17740.11.000[5]MaxcLCB16My-MaxOK5.432735206.93191268.3OK0.12791.23890.11.000[5]MincLCB29My-MinOK38.18225009.357191268.3OK0.12791.23890.10.000[6]MaxcLCB16My-MaxOK5.490335206.93193295.7OK0.19231.23890.10.000[6]MincLCB29My-MinOK38.58695009.357193295.7OK0.19231.23890.11.000[6]MaxcLCB16My-MaxOK3.97750212.97199697.4OK0.19771.2870.13041.000[6]MincLCB29My-MinOK2139.464-77.3297165444.1OK0.25331.28620.11960.000[7]MaxcLCB16My-MaxOK4.017750212.97201738.5OK0.20171.28750.10.000[7]MincLCB29My-MinOK2713.582-77.3297209840.5OK0.42561.26380.11.000[7]MaxcLCB16My-MaxOK4.062251388.48208751.4OK0.21.31430.18751.000[7]MincLCB29My-MinOK14.4439-14320.6206845.4OK0.38251.25420.15850.000[8]MaxcLCB16My-MaxOK4.0151388.48206067.1OK0.20321.31560.10010.000[8]MincLCB29My-MinOK15.8132-14320.6226454.8OK0.44711.29230.09991.000[8]MaxcLCB32My-MaxOK5.330940120.71213881OK0.20431.35940.24721.000[8]MincLCB13My-MinOK5.8014-39148.4227116.3OK0.39971.30230.19880.000[9]MaxcLCB32My-MaxOK5.312640120.71213145.6OK0.20831.36180.10.000[9]MincLCB13My-MinOK6.3282-39148.4247736.9OK0.45011.34010.11.000[9]MaxcLCB32My-MaxOK11.429418164.67207610.6OK0.20871.38160.31011.000[9]MincLCB13My-MinOK3.4495-77435.2267115.6OK0.3751.41920.23590.000[10]MaxcLCB32My-MaxOK11.053118164.67200775.7OK0.21821.36940.10010.000[10]MincLCB13My-MinOK3.9103-77435.2302792.5OK0.45841.41310.09991.000[10]MaxcLCB32My-MaxOK21.6442-16004.7346409.5OK0.4361.49040.27161.000[10]MincLCB13My-MinOK2.7191-127397346409.5OK0.4361.49040.27160.000[11]MaxcLCB32My-MaxOK24.0056-16004.7384201.4OK0.57181.48790.10.000[11]MincLCB13My-MinOK3.0158-127397384201.4OK0.57181.48790.11.000[11]MaxcLCB32My-MaxOK7.7849-55969435713.1OK0.50741.57290.27891.000[11]MincLCB13My-MinOK2.4078-180957435713.1OK0.50741.57290.27890.000[12]MaxcLCB32My-MaxOK8.4917-55969475273.2OK0.64341.57170.09990.000[12]MincLCB13My-MinOK2.6264-180957475273.2OK0.64341.57170.09991.000[12]MaxcLCB32My-MaxOK5.0966-105505537715.1OK0.59681.66980.30421.000[12]MincLCB13My-MinOK2.203-244085537715.1OK0.59681.66980.30420.000[13]MaxcLCB32My-MaxOK5.4967-105505579934OK0.70141.670.10.000[13]MincLCB13My-MinOK2.376-244085579934OK0.70141.670.11.000[13]MaxcLCB32My-MaxOK3.9635-164798653177.1OK0.6361.77910.32881.000[13]MincLCB13My-MinOK2.0596-317142653177.1OK0.6361.77910.32880.000[14]MaxcLCB32My-MaxOK4.2342-164798697792.9OK0.76811.78050.10.000[14]MincLCB13My-MinOK2.2003-317142697792.9OK0.76811.78050.11.000[14]MaxcLCB28My-MaxOK3.3521-232684779967.9OK0.65491.90120.36191.000[14]MincLCB13My-MinOK1.9448-401061779967.9OK0.65491.90120.36190.000[15]MaxcLCB28My-MaxOK3.5643-232684829358.7OK0.87331.90360.10010.000[15]MincLCB13My-MinOK2.0679-401061829358.7OK0.87331.90360.10011.000[15]MaxcLCB28My-MaxOK3.0633-297521911391.9OK0.76582.00930.35921.000[15]MincLCB13My-MinOK1.8858-483291911391.9OK0.76582.00930.35920.000[16]MaxcLCB28My-MaxOK3.2359-297521962753.7OK0.95782.01190.10.000[16]MincLCB13My-MinOK1.9921-483291962753.7OK0.95782.01190.11.000[16]MaxcLCB28My-MaxOK2.8633-3695611058151OK0.8552.12880.39231.000[16]MincLCB13My-MinOK1.8379-5757301058151OK0.8552.12880.39230.000[17]MaxcLCB28My-MaxOK3.0107-3695611112643OK1.06462.13220.10010.000[17]MincLCB13My-MinOK1.9326-5757301112643OK1.06462.13220.10011.000[17]MaxcLCB23My-MaxOK2.7185-4493601221579OK0.94522.25880.39831.000[17]MincLCB13My-MinOK1.7988-6791171221579OK0.94522.25880.39830.000[18]MaxcLCB23My-MaxOK2.8473-4493601279457OK1.14162.26310.09990.000[18]MincLCB13My-MinOK1.884-6791171279457OK1.14162.26310.09991.000[18]MaxcLCB23My-MaxOK2.633-5335571404868OK1.02612.40240.41871.000[18]MincLCB13My-MinOK1.7694-7939701404868OK1.02612.40240.41870.000[19]MaxcLCB23My-MaxOK2.7482-5335571466296OK1.2292.40720.09990.000[19]MincLCB13My-MinOK1.8468-7939701466296OK1.2292.40720.09991.000[19]MaxcLCB23My-MaxOK2.563-6266711606150OK1.13852.55350.43781.000[19]MincLCB13My-MinOK1.7432-9213941606150OK1.13852.55350.43780.000[20]MaxcLCB23My-MaxOK2.6636-6266711669172OK1.26682.55890.10.000[20]MincLCB13My-MinOK1.8116-9213941669172OK1.26682.55890.11.000[20]MaxcLCB23My-MaxOK2.5395-6939821762398OK1.20822.686611.000[20]MincLCB13My-MinOK1.7364-10149831762398OK1.20822.686610.000[21]MaxcLCB23My-MaxOK2.5421-6939821764167OK1.20822.68430.10.000[21]MincLCB13My-MinOK1.7381-10149831764167OK1.20822.68430.11.000[21]MaxcLCB23My-MaxOK2.4007-7365631768248OK1.21032.68820.11.000[21]MincLCB13My-MinOK1.6463-10740571768248OK1.21032.68820.10.000[22]MaxcLCB23My-MaxOK2.4007-7365631768248OK1.21032.68820.10.000[22]MincLCB13My-MinOK1.6463-10740571768248OK1.21032.68820.11.000[22]MaxcLCB23My-MaxOK2.2885-7733341769795OK1.21032.68930.11.000[22]MincLCB13My-MinOK1.5731-11250501769795OK1.21032.68930.10.000[23]MaxcLCB23My-MaxOK2.2885-7733341769795OK1.21032.68930.10.000[23]MincLCB13My-MinOK1.5731-11250501769795OK1.21032.68930.11.000[23]MaxcLCB23My-MaxOK2.2024-8035931769796OK1.21032.68930.11.000[23]MincLCB13My-MinOK1.5166-11669581769796OK1.21032.68930.10.000[24]MaxcLCB28My-MaxOK2.1278-8317361769796OK1.21032.68930.10.000[24]MincLCB13My-MinOK1.4324-12355031769796OK1.21032.68930.11.000[24]MaxcLCB28My-MaxOK2.2144-7992271769795OK1.21032.68930.11.000[24]MincLCB13My-MinOK1.4859-11910731769795OK1.21032.68930.10.000[25]MaxcLCB28My-MaxOK2.2144-7992271769795OK1.21032.68930.10.000[25]MincLCB13My-MinOK1.4859-11910731769795OK1.21032.68930.11.000[25]MaxcLCB28My-MaxOK2.3278-7596241768248OK1.21032.68820.11.000[25]MincLCB13My-MinOK1.5553-11369471768248OK1.21032.68820.10.000[26]MaxcLCB28My-MaxOK2.3278-7596241768248OK1.21032.68820.10.000[26]MincLCB13My-MinOK1.5553-11369471768248OK1.21032.68820.11.000[26]MaxcLCB28My-MaxOK2.4722-7136161764167OK1.20822.68430.11.000[26]MincLCB13My-MinOK1.6426-10740091764167OK1.20822.68430.10.000[27]MaxcLCB28My-MaxOK2.4722-7136161764167OK1.20822.68430.10.000[27]MincLCB13My-MinOK1.6426-10740091764167OK1.20822.68430.11.000[27]MaxcLCB28My-MaxOK2.6081-6406831670942OK1.26682.5566-0.81.000[27]MincLCB13My-MinOK1.716-9737511670942OK1.26682.5566-0.80.000[28]MaxcLCB28My-MaxOK2.5136-6406881610424OK1.13852.55790.10.000[28]MincLCB13My-MinOK1.6538-9737461610424OK1.13852.55790.11.000[28]MaxcLCB28My-MaxOK2.7313-5384241470571OK1.2292.4118-0.23791.000[28]MincLCB13My-MinOK1.7624-8344141470571OK1.2292.4118-0.23790.000[29]MaxcLCB28My-MaxOK2.6166-5384271408864OK1.02612.40680.09990.000[29]MincLCB13My-MinOK1.6885-8344111408864OK1.02612.40680.09991.000[29]MaxcLCB28My-MaxOK2.8926-4437001283455OK1.14162.2677-0.21891.000[29]MincLCB13My-MinOK1.8154-7069651283455OK1.14162.2677-0.21890.000[30]MaxcLCB28My-MaxOK2.7616-4437021225311OK0.94522.26330.09990.000[30]MincLCB13My-MinOK1.7332-7069621225311OK0.94522.26330.09991.000[30]MaxcLCB28My-MaxOK3.13-3566701116379OK1.06462.1369-0.19831.000[30]MincLCB13My-MinOK1.8893-5909051116379OK1.06462.1369-0.19830.000[31]MaxcLCB28My-MaxOK2.9764-3566721061592OK0.8552.13320.10010.000[31]MincLCB13My-MinOK1.7966-5909021061592OK0.8552.13320.10011.000[31]MaxcLCB28My-MaxOK3.4803-277619966201.5OK0.95782.0165-0.19221.000[31]MincLCB13My-MinOK1.9893-485697966201.5OK0.95782.0165-0.19220.000[32]MaxcLCB28My-MaxOK3.2943-277621914570OK0.76582.01390.10.000[32]MincLCB13My-MinOK1.883-485694914570OK0.76582.01390.11.000[32]MaxcLCB28My-MaxOK4.0433-205908832546.1OK0.87331.9083-0.15911.000[32]MincLCB13My-MinOK2.1315-390587832546.1OK0.87331.9083-0.15910.000[33]MaxcLCB28My-MaxOK3.8044-205909783365OK0.65491.90670.10010.000[33]MincLCB13My-MinOK2.0056-390584783365OK0.65491.90670.10011.000[33]MaxcLCB28My-MaxOK5.3603-130814701203.9OK0.76811.7863-0.16181.000[33]MincLCB13My-MinOK2.4054-291517701203.9OK0.76811.7863-0.16180.000[34]MaxcLCB28My-MaxOK5.0171-130818656325.9OK0.65481.78470.10.000[34]MincLCB13My-MinOK2.2515-291512656325.9OK0.65481.78470.11.000[34]MaxcLCB28My-MaxOK9.0537-64336.3582483.8OK0.78091.676-0.12881.000[34]MincLCB13My-MinOK2.8479-204530582483.8OK0.78091.676-0.12880.000[35]MaxcLCB28My-MaxOK8.3991-64340540398.8OK0.60111.67540.10.000[35]MincLCB13My-MinOK2.6422-204526540398.8OK0.60111.67540.11.000[35]MaxcLCB32My-MaxOK85.4758-5583.54477257.9OK0.72771.5777-0.10431.000[35]MincLCB13My-MinOK3.696-129128477257.9OK0.72771.5777-0.10430.000[36]MaxcLCB32My-MaxOK78.3633-5586.13437748.1OK0.55561.57850.09990.000[36]MincLCB13My-MinOK3.3901-129125437748.1OK0.55561.57850.09991.000[36]MaxcLCB32My-MaxOK4.233145276.61191658.5OK0.22221.4429-0.1891.000[36]MincLCB13My-MinOK5.9073-65260.9385513.7OK0.60261.4939-0.0790.000[37]MaxcLCB32My-MaxOK4.579145274.97207320.7OK0.22221.4540.10.000[37]MincLCB13My-MinOK5.335-65262.6348177OK0.46541.49660.11.000[37]MaxcLCB16My-MaxOK2.2137100459.9222392.2OK0.23111.3765-0.17031.000[37]MincLCB25My-MinOK22.51445OK0.54681.4199-0.07170.000[38]MaxcLCB16My-MaxOK2.3561100458.9236686.9OK0.22781.38210.10010.000[38]MincLCB25My-MinOK19.8912-13501.3268556.3OK0.4171.42520.09991.000[38]MaxcLCB16My-MaxOK1.6288146187238107OK0.22371.3627-0.111.000[38]MincLCB25My-MinOK9.90324043.84238107OK0.22371.3627-0.110.000[39]MaxcLCB16My-MaxOK1.8392146188.5268865.5OK0.24951.32480.10.000[39]MincLCB25My-MinOK11.183424041.5268865.5OK0.24951.32480.11.000[39]MaxcLCB16My-MaxOK1.4916179655.6267977.3OK0.24951.3153-0.04711.000[39]MincLCB20My-MinOK5.381649794.73267977.3OK0.24951.3153-0.04710.000[40]MaxcLCB16My-MaxOK1.4918179657.9268016.3OK0.24021.31350.10010.000[40]MincLCB20My-MinOK5.382349795.6268016.3OK0.24021.31350.10011.000[40]MaxcLCB16My-MaxOK1.3004201469.7262000.2OK0.24021.28680.01261.000[40]MincLCB20My-MinOK3.996265562.48262000.2OK0.24021.28680.01260.000[41]MaxcLCB16My-MaxOK1.2895201474.1259803OK0.21861.28580.10.000[41]MincLCB20My-MinOK3.962765562.64259803OK0.21861.28580.11.000[41]MaxcLCB16My-MaxOK1.2318211248.5260215.6OK0.21471.27690.06961.000[41]MincLCB20My-MinOK3.592372437.73260215.6OK0.21471.27690.0696（2）斜截面抗剪驗(yàn)算截面最大設(shè)計(jì)剪力=54142KN,對應(yīng)的截面抗力=74703KN，富裕量37%，其余截面抗剪均滿足要求。九.結(jié)構(gòu)撓度驗(yàn)九.結(jié)構(gòu)撓度驗(yàn)算短期組合下橋梁結(jié)構(gòu)撓度示意圖如下：成橋階段結(jié)構(gòu)撓=69mm≤L/600=110/600=183mm。故撓度驗(yàn)算滿足規(guī)范要求。十.橋梁動力計(jì)算結(jié)果模型中將結(jié)構(gòu)自重和二期衡載轉(zhuǎn)化為Z方向的質(zhì)量，算得前6階基頻如下：模態(tài)號頻率 (cycle/sec)周期(sec)11.7172080.58234122.8555970.35018933.7727990.26505544.580670.21830957.0038060.1427868.5090910.117521一階自振頻率圖形二階自振頻率圖形三階自振頻率圖形四階自振頻率圖形五階自振頻率圖形六階自振頻率圖形十一.橋梁預(yù)拱度計(jì)算結(jié)果考慮混凝土收縮徐變后10年，算得施工預(yù)拱度如上圖所示，計(jì)算得跨中最大預(yù)拱度約50mm。根據(jù)目前主流對預(yù)拱度的研究文獻(xiàn)，最終預(yù)拱度建議值為恒載+1/2活載+70mm的收縮預(yù)抬值。最終各個階段施工預(yù)抬值由施工監(jiān)控單位等據(jù)實(shí)際情況計(jì)算確定。十一.頂板橫向計(jì)算對于箱形截面,由于橫隔板相隔較遠(yuǎn),邊板和中板均按單向板計(jì)算。故取跨中單位長度的橫向框架進(jìn)行分析。橫向計(jì)算模型（一）恒載內(nèi)力橋面板自重由軟件自動計(jì)算；二期恒載按防撞欄桿8KN/m，車行道0.16×24.5=3.92KN/m，人行道(4.5×0.615×0.5×25+5+8)/4.4=10.82KN/m。中分帶：0.53×1×25=13.25KN/m。（二）活載內(nèi)力(橫向按城-A級標(biāo)準(zhǔn)重車加載)翼板，按懸臂板計(jì)算，據(jù)《公預(yù)規(guī)》第4.2.5條：人群荷載：qr=4.0KN/m；人行道側(cè)：無中分帶側(cè)：車輪荷載：軸重p=200KN，輪重100KN；a=a1+2h+2c=0.2+2×0.16+(0.16+1.51)×2=3.86m；b=b1+2h=0.6+2×0.16=0.92m。qc=p/ab=100/3.86/0.92=28.16KN/m。車輪