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1、FACTAUNIVERSITATISoSeries:ArchitectureandCivilEngineeringVol.5,N2,2007,pp.141-148COMPOSITETIMBER-CONCRETEROADBRIDGESTRUCTUREUDC624.21:624.011.1(045)=20DragoslavStojić,TomaKajganovićUniversityofNiš,FacultyofCivilEngineeringandArchitecture,SerbiaAbstract.Thisworkpresentspreliminarydesigno
2、ftheroadbridgemadeoflaminatedtimber.Thesupportingsystemofthemainbearingelementsismadeofthelaminatedtimberinthesystemofarchwiththreejoints;thebridgeslabisdesignedascontinuousslab,madeofnineequalfields;eachpartismadeascompositetimber-concretebeam,wheretheroadslabismadeofconcreteandtheneed
3、lepiecesaremadeoftimber.FundamentisbasedonHWpiles.AlltheelementsaredesignedtoEUROCODE.Keywords:theroadbridge,compositeconstruction,EUROCODE.1.INTRODUCTIONAsinusingnewmaterialsasinusingtraditionalmaterials,moderncivilengineeringstandsinfrontofconstructorswithnewtechnologiesandinnovatingm
4、ethodsduringmanufacturingandproducing,consideringoptimalestheticandrationaldemands.Adequateandrationaluseofmaterialsinconstructionsledtoinventionofcompositebeams.Themostusedcompositebeamsaresteel-concreteelements,butwecanuseothertypesofmaterials,liketimber-concreteelements.Timber,aswell
5、assteel,hasrespectabletensestrength,soitcanbecombinedwithconcrete.Comparedtoclassicaltimberconstructions,compositetimber-concreteelementshavehigherstiffness,fireproofness,stabilityandseismicresistance,andcomparedwithcompositesteel-concreteelements,timber-concreteelementshavelessdeadweig
6、ht.2.BRIDGELAYOUTThesupportingbeamofthemainbearingelementismadeinthesystemofarchwiththreejoints.Wholeconstructionismadeoffourarchesinthedistanceof167cmbetweenthem.ReceivedNovember22,2007142D.STOJIĆ,T.KAJGANOVIĆThesupportingbearisdesignedlikerectangle,dimensions0,4x1,2m,witharchspan48,32
7、m.Itismadeoffirstclasslaminatedtimber.Bridgewideis8,0m,lengthis72m.Bucklingofsupportingbeamsisstoppedbycompositeneedlepieces,dimensions0,2x0,6mandbysteelcrossmembers,diameter2cm.25.008.001,5%1,5%R55.2,5%201.112,5%31.00023.527.008.0060.0060.0060.0060.0015.04120.0040.0040.0040.00
