主讲曾绍武陕西铁路工程第讲连续梁钢筋课件讲解

主讲：曾绍武

陕西铁路工程职业技术学院第23讲连续梁钢筋构造Continuationof23lecturesoncontinuousconstructionofbeamreinforcementstructureSpeaker:ZengShaowuShaanxiRailwayEngineeringVocationalandTechnicalCollege任务1.纵向应力筋布置形式及要求任务2.横向应力筋布置形式及要求任务3.竖向预应力筋布置形式及要求本节任务TasksinthissectionTask1.LayoutformandrequirementsoflongitudinalstressbarsTask2.LayoutformandrequirementsoftransversestressbarsTask3.Layoutformandrequirementsofverticalprestressedreinforcement1.直线型：顶推法施工时所采用的布置方式。任务1：纵向应力筋布置形式及要求望城沩江桥4x38+2x38(m)两联等高度连续梁桥；WangchengWeijiangBridge4x38+2x38(m)doubleequalheightcontinuousbeambridge;单箱双室湖南；SingleboxdoubleroomHunan;主跨38米；梁高2.5m多点顶推法施工Themainspanis38meters;Beamheight2.5mMultiplepointpushingmethodconstructionTask1:Layoutformandrequirementsoflongitudinalstressbars1.Lineartype:Thelayoutmethodusedduringtheconstructionofthepushingmethod.2.先简支后连续布置形式b)2.Simplesupportfollowedbycontinuouslayout顶板直线布置预应力Straight-linelayoutofprestressedroof简支梁接头架设好SetupproperlySimplysupportedbeamjoint6*35m=210m连续湿接头变连续BecomingcontinuousContinuouswetjoint3.曲线布置预应力—连续箱梁3.Curvedlayoutprestressed-continuousboxgirder适合于悬臂法施工Suitableforcantileverconstruction4.连续曲线布置---整体现浇梁法4.Continuouscurvelayout-integralcast-in-placebeammethod以悬臂施工连续梁为例介绍连续梁三向预应力布置及作用Takingcantileverconstructionofcontinuousbeamsasanexampletointroducethethree-dimensionalprestressedarrangementandfunctionofcontinuousbeams纵向预应力钢筋类型Typeoflongitudinalprestressedsteelbars纵向预应力钢筋Longitudinalprestressedsteelbars任务1解析：纵向预应力沿着梁体纵向布置，主要抵抗纵向弯矩，钢丝束。Task1Analysis:Longitudinalprestressingisarrangedalongthelongitudinaldirectionofthebeambody,mainlyresistinglongitudinalbendingmomentsandsteelwirebundles.任务2：横向预应力钢筋类型及作用？任务2解析：横向预应力沿着梁顶翼缘板横向布置，主要抵抗横向弯矩，扁锚钢绞线。Task2:Typesandfunctionsoftransverseprestressedsteelbars?Task2Analysis:Thetransverseprestressisarrangedhorizontallyalongthetopflangeplateofthebeam,mainlyresistingthetransversebendingmoment,andtheflatanchorsteelstrand.任务3:解析：竖向预应力沿着梁体竖向布置，主要抵抗剪力，精轧螺纹钢。任务3.竖向预应力筋布置形式及要求Task3.LayoutformandrequirementsofverticalprestressedreinforcementTask3:Analysis:Verticalpre-stressisarrangedverticallyalongthebeambody,mainlytoresistshearforce,andprecisionrolledthreadedsteelisused.竖向预应力筋Verticalprestressedreinforcement纵向应力筋布置形式及要求；Layoutformandrequirementsoflongitudinalstressbars;横向应力筋布置形式及要求；Layoutformand