資源描述:
《某高速公路三號(hào)跨線橋設(shè)計(jì)畢業(yè)論文》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、鄭州航空工業(yè)管理學(xué)院畢業(yè)論文(設(shè)計(jì))2015屆土木工程(道路橋梁方向)專業(yè)951班級(jí)題目某高速公路三號(hào)跨線橋設(shè)計(jì)姓名周雯晶學(xué)號(hào)130995140指導(dǎo)教師李銳職稱講師二ОО15年5月12日1摘要畢業(yè)設(shè)計(jì)主要是關(guān)于小跨度預(yù)應(yīng)力混凝土簡(jiǎn)支箱梁橋上部結(jié)構(gòu)的設(shè)計(jì)。預(yù)應(yīng)力混凝土簡(jiǎn)支箱梁橋以結(jié)構(gòu)受力性能好、變形小、行車平順舒適、養(yǎng)護(hù)工程量小、抗震能力強(qiáng)等而成為最富有競(jìng)爭(zhēng)力的主要橋型之一。受時(shí)間和個(gè)人能力的限制,本次畢業(yè)設(shè)計(jì)沒(méi)有具體涉及到下部結(jié)構(gòu)。設(shè)計(jì)橋梁標(biāo)準(zhǔn)跨度為20m,橫向布置5片箱梁,橋面寬為8.5m,設(shè)計(jì)車道數(shù)為2車道?;A(chǔ)形式采用鉆孔灌注樁。設(shè)計(jì)過(guò)程如下:首先,確定主梁主要構(gòu)造及細(xì)部尺寸,它必須
2、與橋梁的規(guī)定和施工保持一致,考慮到抗彎剛度及抗扭剛度的影響,設(shè)計(jì)采用箱形梁。頂板厚度沿全橋不變?yōu)?.18m,底板厚度在跨中為0.18m,端部為0.25m。其次,計(jì)算橋梁結(jié)構(gòu)總的內(nèi)力(包括恒載和活載的內(nèi)力計(jì)算)。然后進(jìn)行內(nèi)力組合,從而估算出縱向預(yù)應(yīng)力筋的數(shù)目,然后再布置預(yù)應(yīng)力鋼絲束。再次,計(jì)算后張法中各個(gè)階段的預(yù)應(yīng)力損失。最后進(jìn)一步進(jìn)行截面強(qiáng)度的驗(yàn)算,其中包括承載能力極限狀態(tài)和正常使用極限狀態(tài)。在正常使用極限狀態(tài)驗(yàn)算中包括計(jì)算截面的混凝土法向應(yīng)力驗(yàn)算、預(yù)應(yīng)力鋼筋中的拉應(yīng)力驗(yàn)算、截面的主應(yīng)力計(jì)算,預(yù)應(yīng)力階段和使用階段主梁截面的強(qiáng)度和變形驗(yàn)算、錨固區(qū)局部強(qiáng)度驗(yàn)算和撓度的計(jì)算。設(shè)計(jì)最后結(jié)合本橋的特
3、點(diǎn)編制施工方案,主要包括上部結(jié)構(gòu)施工,下部結(jié)構(gòu)基礎(chǔ)和墩身的施工工藝等。2ABSTRACTGraduationismainlyonsmall-spanprestressedconcreteboxgirderbridgestructuredesign.Prestressedconcreteboxgirderbridgewithgoodmechanicalpropertiesofthestructure,deformationissmall,thedrivingcomfortcomfortable,asmallamountofmaintenanceengineering,seismicandst
4、rongabilitytobecomethemostcompetitiveoneofthemainbridge.Andpersonalcapacitybythetimeconstraints,thisgraduationdesignisnotspecificallyrelatedtothelowerpartofthestructure.symmetricalSpanbridgedesignstandardsforthe20m,transversestandardspanbridge5pieces,bridgethewidthof8.5m,designfor2laneslanenumber.
5、symmetricalbalancepouringconcrete.Designprocessisasfollows:First,thebeamsofthemainstructureandthesize,itmustcorrespondwiththeprovisionsofthebridgeandworkingtogethertoresistandstiffnessandtoturnthestiffnessofthedesignadoptstheboxgirder.Thethicknessofthewholebridgeis0.18m,floorthicknessinthecrossfor
6、0.18m,endsfor0.25m.Thesecondsteptoanalyzeinternalgrossforceofthestructures(includingdeadloadandlivedload),theinternalforcecompositioncanbedonebyusingthecomputeresults.Accordingtotheinternalforcecomposited,theevaluatedamountoflongitudinaltendonscanbeworkedout,thenwecandistributethetendonstothebridg
7、e.Again,afterthecalculationofthelawofthestagesinprestressed.Thelaststepsischeckingthemaincrosssection.theworkincludestheload-caringcapacityultimatestateandthenormalserviceabilityultimatestateaswellasthemainsectio