《压型钢板组合楼板》PPT课件

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1、Chapter3Compositefloorwithsteelprofiled压型钢板-混凝土组合楼板ByProfessorShimingChenLectureNotesforPresentation2013OBJECTIVE/SCOPETodescribethedesignofone-wayspanningcompositeslabs,formedusingprofiledsteelsheetingandaconcretetopping,includingconsiderationofultimateandserviceabilitylimitstatedesi

2、gnforbuildingstructures.压型钢板、压型钢板分类压型钢板-混凝土组合楼板应用范围设计方法构造3.1Introduction压型钢板-混凝土组合楼板是指将压型钢板与混凝土通过某种构造措施组合成整体而共同工作的受力构件。Compositeflooringsystemconsistsofacold-formed,profiledsteelsheetwhichacts,notonlyasthepermanentformworkforanin-situcastconcreteslab,butalsoasthetensilereinforcementTh

3、eessentialcompositeactionbetweenthesteeldeckandtheconcreteslabisprovidedbysomeformofinterlockingdevice,capableofresistinghorizontalshearandpreventingverticalseparationatthesteel/concreteinterface.Compositeslabwithprofiledsteelsheetitprovidesaworkingplatformforconstruction.itactsasform

4、workfortheconcreteslab.itconstitutesbottomreinforcementfortheslab.ProfiledSteelsheeting(apatternof‘embossments’)板面的齿槽与压痕可提供界面粘结力；界面的摩擦粘结等Constructionstage:placetheprofiledsteelsheetingoverthesupportbeamsConstructionstage:weldstudsthroughthesteelsheetingwithportableweldinggunConstructi

5、onstage:placethelightsteelreinforcement/steelmeshConstructionstage:castconcreteTypesofProfiledSheet压型钢板类型Re-entranttypes闭口型压型钢板Trapezoidaltypes开口型压型钢板Advantagesidentifiedasthefollows:Thesteeldeckactsaspermanentshutteringforthein-situcastconcreteslab,withaconsequentsavingintimeandlabor

6、.Itonceinposition,immediatelyprovidesaplatformtosupportconstructionloadsandasafe,sturdyworkingsurface.Itactsasthetensilereinforcement.Thesteeldeckgeometrycanresultinareductionoflaborabout30%intheamountofconcretefillrequiredforthefloor,significantreductionindeadweightloads.3.2.DESIGNPR

7、INCIPLES设计验算DesignSituations（设计工况）Twodistinctstructuralstatesmustbechecked:firstly,thetemporarystateofexecution,whenonlythesheetingresiststheappliedloads（constructionstage施工阶段）;secondly,thepermanentstate,aftertheconcreteisbondedtothesteelgivingcompositeaction（compositestage正常使用阶段）.Rel

8、evant