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1、多跨預應(yīng)力簡支T型梁橋?qū)W校代碼：學號：HefeiUniversity畢業(yè)設(shè)計BACHELORDISSERTATION設(shè)計題目：多跨梁橋綜合設(shè)計學位類別：學科專業(yè)：土木工程作者姓名：王守亮導師姓名：韓振峰完成時間：2015年5月多跨梁橋綜合設(shè)計摘要梁橋是指結(jié)構(gòu)在垂直荷載作用下，支座只產(chǎn)生垂直反力而無水平反力的梁式體系橋的總稱，該類橋的特點是受力明確，計算簡單，理論與實際吻合好，施工也比較方便。預應(yīng)力混凝土T形橋梁結(jié)構(gòu)簡單，受力明確，具有節(jié)省材料，架設(shè)安裝方便，跨越能力較大等優(yōu)點。本設(shè)計為新建橋梁，屬跨
2、河橋，對其進行綜合設(shè)計。主要內(nèi)容包括：縱橫斷面布置，主梁設(shè)計，橫隔梁設(shè)計，還有行車道板設(shè)計?？v橫斷面布置：根據(jù)規(guī)范要求和工程實踐經(jīng)驗確定主梁間距與主梁片數(shù)和主梁高度及各截面主要尺寸。主梁設(shè)計：內(nèi)力計算由恒載內(nèi)力和活載內(nèi)力計算組成。恒載內(nèi)力由結(jié)構(gòu)力學可求出，而活載內(nèi)力計算時要利用按修正偏心壓力法計算得出的荷載橫向分布系數(shù)。根據(jù)計算得出的各種內(nèi)力組合確定設(shè)計控制內(nèi)力進而對預應(yīng)力鋼束數(shù)進行估算。按后張法制作主梁，采用錐型錨具和直徑50mm的抽拔橡膠管，計算各種預應(yīng)力損失得出有效預應(yīng)力，對主梁進行強度、應(yīng)力
3、和變形驗算。行車道板設(shè)計：本設(shè)計中行車道板的受力圖示為單向板。關(guān)鍵詞：T型梁砼；預應(yīng)力；灌注樁；后張法；修正偏心壓力法1IntegrateddesignofmultispangirderBridgesABSTRACTGirderbridgeisreferstothestructureunderverticalload,bearingmakesverticalreactionandnolevelisthefloorboardofthereactionsystemofbeambridge,thebrid
4、geisthefeatureofstressisclear,simplecalculation,theoryandtheactualmatchwell,constructionisconvenient.PrestressedconcreteTbridgestructureissimple,stress,savematerial,theerectionconvenientinstallation,largespanningcapacity,etc.Themaincontentofthisdesigni
5、sasfollowings:Thearrangeoflongitudinalsectionandlateralsection,Mainbeamsdesign,CrossingbeamdesigningandDrive-wayplankdesigning.Thearrangeoflongitudinalsectionandlateralsection:Accordingtothespecificationandtheexperienceofpracticalengineering,wecandecid
6、ethedistanceofgirders,thenumberofthegirders,theheightofthemainbeamsandthemainsizeofeachsection.Mainbeamsdesign:Internalforcesincludeinvariableforceandvariableforce.Wecanusethemethodofthestructuralmechanics.Tocalculatethevariableinternalforce,wecalculat
7、ethelateraldirectioncoefficientoftheloadwiththemethodofcorrectedeccentricitypressures.withtheresultofthecalculation,wecanobtainthecontrolinternalforce,andwecanapproximatelydecidethenumberofthepre-stressedconcreteband.designthemainbeamswithpost-tensioni
8、ngmethod,selectingpre-burrycorrectedtubeanchoring.Thencalculatethelossofthepre-stressandobtainthevalidpre-stressandexaminethestrength,stress,andtransformofthemainbeams.Crossingbeamdesigning:Tomakesurethatallmainbeamsreartheloadtogethera
