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  • 12/01/2016 ConcreteAnchorFoundationBoltDesignCalculationswithExampleasperACI318AppendixDPart2BreakoutStrengthinTension

    http://blog.mechguru.com/machinedesign/exampleofconcreteanchorboltdesigncalculationpart2determiningconcretebreakoutstrengthofanchorinte 1/6

    MechGuruHomeCategoriesEngineeringdesignManufacturingEngineeringFluidEngineeringEngineeringCalculatorMaterialEngineeringHowitWorksThermalEngineeringEngineeringMathEngineeringSoftwaresVehicleDesignAppliedMathElectronics

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    ExampleofConcreteAnchorBoltDesignCalculationPart1:DeterminingSteelStrengthofAnchorBoltinTension

    ExampleofConcreteAnchorBoltDesignCalculationPart3:DeterminingPulloutStrengthofAnchorinTension

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    ExampleofConcreteAnchorBoltDesignCalculationPart2:DeterminingConcreteBreakoutStrengthofAnchorinTensionWewilldiscusshowtocalculatetheconcretebreakoutstrengthaccordingtotheACI318codeinthispartoftheconcreteanchorfoundationboltdesigncalculationexample.Pleasereferpart1ofthecalculationtounderstandthedesignproblemstatementandthecalculationsfortheanchorboltmaterialsstrength.

    IfyourefertheFig.1andtheFig.2oftheproblemstatementthenitwillcleartoyouthatthedistancebetweentwosurroundinganchors(inourcaseitis6inch)islessthanthreetimestheeffectiveembedmentdepth(inourcaseitis10inch).So,asperACIcodes,theanchorarrangementcanbetermedasgroupandtheACIformulaforcalculatingtheconcretebreakoutstrengthfortheanchorgroupis:

    Ncbg=(ANc/ANco)ec,Ned,Nc,Ncp,NNb..D5

    Where,

    Strengthreductionfactorforbreakoutstrengthanditsvaluefornonreinforcementintensionis0.70ANcTotalprojectedareaforthegroupofanchorsofthefailuresurfaceasapproximatedbyarectanglewithedgesboundedby1.5hef(1.5*10=15inchinourcase)andthefreeedgesoftheconcretefromthecenterlineoftheanchors.Confused?Youwillbeclearerwhilecalculatingitlittlelater.

    hefEffectiveembedmentdepthofanchor(inourcaseitis10inch).

    ANcoTotalprojectedfailureareaapproximatedbyasquareboundedby1.5hef(1.5*10=15inchinourcase)fromthecenterlineoftheanchorsatallthesides.

    ec,NModificationfactorfortheanchorgrouploadedeccentricallyintension,inourcasethereisnoeccentricloading,soec,N=1.

    ed,NModificationfactorforedgeeffectfortheanchorgroupintension,wewillcalculateitlater.

    c,NModificationfactorbasedonthepresenceandabsenceofcrackintheconcrete,wewillcalculateitlater.

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    READPREVIOUSPOST:

    ExampleofConcreteAnchorBoltDesignCalculationPart1:DeterminingSteelStrengthofAnchorBoltinTension

    Anchorboltsareusedextensivelyasfoundationbolts

    forrotatingequipmentslikemachinesandstructural

    Translate

  • 12/01/2016 ConcreteAnchorFoundationBoltDesignCalculationswithExampleasperACI318AppendixDPart2BreakoutStrengthinTension

    http://blog.mechguru.com/machinedesign/exampleofconcreteanchorboltdesigncalculationpart2determiningconcretebreakoutstrengthofanchorinte 2/6

    cp,NModificationfactorforpostweldtypesofanchor.Forcastinplaceanchorcp,N=1

    NbBasicconcretebreakoutstrengthforasingleanchorintension,wewillcalculateitlater.

    CalculationofANc

    Beforegoingtothecalculationpleaserefertheplanviewoftheanchorarrangementasbelow:

    Fig.2.1:AnchorBoltPlanforcalculatingAnc

    ANC=Areaofthesquareshownindottedline

    =(15+6+5)*(15+6+5)=676SquareInch

    CalculationofANco

    Beforegoingtothecalculationpleaserefertheplanviewoftheanchorarrangementasbelow:

    forrotatingequipmentslikemachinesandstructuralmembersliketowers.TheAmerican...

  • 12/01/2016 ConcreteAnchorFoundationBoltDesignCalculationswithExampleasperACI318AppendixDPart2BreakoutStrengthinTension

    http://blog.mechguru.com/machinedesign/exampleofconcreteanchorboltdesigncalculationpart2determiningconcretebreakoutstrengthofanchorinte 3/6

    Fig.2.2:AnchorBoltPlanforcalculatingAnco

    ANC=Areaofthesquareshownindottedline

    =(15+15)*(15+15)=900SquareInch

    Calculationofed,N

    If,Ca,min(minimumdistancesbetweentwoanchors,6inchinourcase)islessthan1.5timesthehef(1.5*10=15inchinourcase)then

    ed,N=0.7+(0.3*Ca,min)/(1.5*hef)

    =0.7+(0.3*6)/(1.5*10)

    =0.82

    Calculationofc,N

    Accordingtothecodethevalueofc,N=1whereconcretecrackislikelytooccur.

    CalculationofNb

    Nb=kchef1.5fcD7

    Where,

    Kcafactorwhichhasvalueof24forcastinconcrete.

    Afactorrelatedtothereducedmechanicalpropertiesofconcrete,fornormalweightconcrete=1

    hefEffectiveembedmentdepthofanchor(inourcaseitis10inch).

    fcSpecifiedcompressivestrengthoftheconcrete,inourcasefc=4000psi(referproblemstatement)

    So,byputtingthevalueinD7weget:

    Nb=24*1*10^1.5*4000^0.5

  • 12/01/2016 ConcreteAnchorFoundationBoltDesignCalculationswithExampleasperACI318AppendixDPart2BreakoutStrengthinTension

    http://blog.mechguru.com/machinedesign/exampleofconcreteanchorboltdesigncalculationpart2determiningconcretebreakoutstrengthofanchorinte 4/6

    =48000lb

    Now,byputtingallthevaluesinD5wegettheConcretebreakoutstrengthfortheanchorgroup

    Ncbg=(ANc/ANco)ec,Ned,Nc,Ncp,NNb

    =0.70*(676/900)*1*0.82*1*1*48000

    =20694.6131lb

    So,finallywegottheconcretebreakoutstrengthoftheanchorgroupintensionas20694.6131lb.Inthenextpart(Part3)ofthefoundationanchorboltdesigncalculationexample,wewilldiscussaboutcalculatingtheconcretepulloutforceintension.

    AboutShibashisGhoshShibashisisamechanicaldesignengineerbyprofessionandwriter/bloggerbypassion.Hehasworkedinvariousdesignprojectsinautomobile,powerplantandheavyearthmovingequipmentdomainsince2005.Inhissparetimeapartfrommaintainingthisblog,heenjoyinvestingtimebuildinghisfirstRCplane

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    1comment

    1.

    ashe

    August19,2015at1:58am(UTC5.5)

    accordingtothecommentary,ca,ministheminimumedgedistance,nottheminimumdistancebetweenboltsasyoustatedabove.

    LeaveaReply

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    ExampleofConcreteAnchorBoltDesignCalculationPart6:DeterminingConcreteBreakoutStrengthofAnchorinShearIn"Engineeringdesign"

    ExampleofConcreteAnchorBoltDesignCalculationPart3:DeterminingPulloutStrengthofAnchorinTensionPleaserefertheproblemstatementandthepart1,part2ofthiscastinplaceconcreteanchorboltdesigncalculationexamplesothatyouwillbeinphasewiththispart(part3)ofthecalculation.HerewewillcalculatethepulloutstrengthoftheIn"Engineeringdesign"

    ExampleofConcreteAnchorBoltDesignCalculationPart4:DeterminingSidefaceBlowoutStrengthofAnchorinTensionInthispartwewillcalculatethesidefaceblowoutstrengthoftheconcreteanchoraccordingtotheACI318AppendixDcodesandalsoconsolidatetheresultsofthedifferenttypesofanchorstrengthsintensionwehavecalculatedsofar.PleaseIn"Engineeringdesign"

  • 12/01/2016 ConcreteAnchorFoundationBoltDesignCalculationswithExampleasperACI318AppendixDPart3PullOutStrengthinTension

    http://blog.mechguru.com/machinedesign/exampleofconcreteanchorboltdesigncalculationpart3determiningpulloutstrengthofanchorintension/ 1/3

    MechGuruHomeCategoriesEngineeringdesignManufacturingEngineeringFluidEngineeringEngineeringCalculatorMaterialEngineeringHowitWorksThermalEngineeringEngineeringMathEngineeringSoftwaresVehicleDesignAppliedMathElectronics

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    ExampleofConcreteAnchorBoltDesignCalculationPart2:DeterminingConcreteBreakoutStrengthofAnchorinTension

    ExampleofConcreteAnchorBoltDesignCalculationPart4:DeterminingSidefaceBlowoutStrengthofAnchorinTension

    PrintthisPost

    ExampleofConcreteAnchorBoltDesignCalculationPart3:DeterminingPulloutStrengthofAnchorinTensionPleaserefertheproblemstatementandthepart1,part2ofthiscastinplaceconcreteanchorboltdesigncalculationexamplesothatyouwillbeinphasewiththispart(part3)ofthecalculation.HerewewillcalculatethepulloutstrengthoftheconcreteanchoraccordingtotheACI318AppendixDcodes.

    WhatisAnchorPulloutStrength?

    Asthenamesuggests,itistheforcerequiredtouprootaanchoroutoftheconcrete.

    Calculation

    AccordingtoACIcodes,thepulloutstrengthofthegroupofanchorsisgivenby

    Npn=8nc,PAbrgfc..D14

    Where,Strengthreductionfactorforpulloutstrengthanditsvaluefornonreinforcementintensionis0.70c,PModificationfactorforpulloutstrengthbasedonthepresenceofconcretecracks,fortheconcretewithcracksatserviceloadlevelc,P=1.

    nNumberofanchorbolts,inourcasen=4.

    AbrgNetbearingareaoftheheadofanchorboltinsquareinch,inourcaseAbrg=0.654Squareinch.

    fcTheconcretesspecifiedcompressivestrengthinpsi,inourcasefc=4000psi.

    So,byputtingallthevaluesinD14,wegetthepulloutstrengthoftheanchorgroupas

    Npn=0.7*8*4*1*0.654*4000lb

    =58598.4lb

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    ExampleofConcreteAnchorBoltDesignCalculationPart2:DeterminingConcreteBreakoutStrengthofAnchorinTension

    WewilldiscusshowtocalculatetheconcretebreakoutstrengthaccordingtotheACI318codeinthispartof...

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  • 12/01/2016 ConcreteAnchorFoundationBoltDesignCalculationswithExampleasperACI318AppendixDPart4BlowoutStrengthinTension

    http://blog.mechguru.com/machinedesign/exampleofconcreteanchorboltdesigncalculationpart4determiningsidefaceblowoutstrengthofanchorinten 1/3

    MechGuruHomeCategoriesEngineeringdesignManufacturingEngineeringFluidEngineeringEngineeringCalculatorMaterialEngineeringHowitWorksThermalEngineeringEngineeringMathEngineeringSoftwaresVehicleDesignAppliedMathElectronics

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    ExampleofConcreteAnchorBoltDesignCalculationPart3:DeterminingPulloutStrengthofAnchorinTension

    ExampleofConcreteAnchorBoltDesignCalculationPart5:DeterminingSteelStrengthofAnchorBoltinShear

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    ExampleofConcreteAnchorBoltDesignCalculationPart4:DeterminingSidefaceBlowoutStrengthofAnchorinTensionInthispartwewillcalculatethesidefaceblowoutstrengthoftheconcreteanchoraccordingtotheACI318AppendixDcodesandalsoconsolidatetheresultsofthedifferenttypesofanchorstrengthsintensionwehavecalculatedsofar.

    Pleaserefertheproblemstatementandthepart1,part2,part3ofthiscastinplaceconcreteanchorboltdesigncalculationexamplesothatyouwillbeinphasewiththispart(part4)ofthecalculation.

    WhatisSidefaceBlowOutStrength?

    Insimpleterm,itisthefailureoftheconcreteduetotheclosenessofananchorboltwiththesidesurfaceoftheconcretefoundation.Whentheanchorboltistooclosetothesidethenthepossibilitiesaretherethatbeforebreakingoutthetopconcretesurface,thesidesurfacegetbroken.Whilecalculatingsidefaceblowoutthedepthoftheanchorboltandthedistanceoftheanchorfromtheclosestedgeareconsidered.

    Calculation

    AccordingtoACIcodes,youneedtocalculatethesidefaceblowoutonlyfortheanchorswhichhasthedistancefromtheedgelesserthan0.4timesthedepthoftheanchor,or

    Ca1

  • 12/01/2016 ConcreteAnchorFoundationBoltDesignCalculationswithExampleasperACI318AppendixDPart4BlowoutStrengthinTension

    http://blog.mechguru.com/machinedesign/exampleofconcreteanchorboltdesigncalculationpart4determiningsidefaceblowoutstrengthofanchorinten 2/3

    Sidefaceblowoutstrength=NA

    Outofthesethreestrengthvaluesthesmallestonewillbethedesignstrength.

    So,thedesignstrengthintension=20694.6131lb

    Ifyourefertheproblemstatementforthisfoundationanchorboltdesigncalculationexamplethenyoucanobservethattensileload(20000lb)appliedislowerthanthecalculateddesignstrengthintension(20694.6131lb),so,thedesignissafeundertensileload.

    Inthenextpart(Part5),wewilldiscusscalculatingthematerielstrengthorsteelstrengthinshear.

    AboutShibashisGhoshShibashisisamechanicaldesignengineerbyprofessionandwriter/bloggerbypassion.Hehasworkedinvariousdesignprojectsinautomobile,powerplantandheavyearthmovingequipmentdomainsince2005.Inhissparetimeapartfrommaintainingthisblog,heenjoyinvestingtimebuildinghisfirstRCplane

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    ExampleofConcreteAnchorBoltDesignCalculationPart1:DeterminingSteelStrengthofAnchorBoltinTensionIn"Engineeringdesign"

    ExampleofConcreteAnchorBoltDesignCalculationPart3:DeterminingPulloutStrengthofAnchorinTensionPleaserefertheproblemstatementandthepart1,part2ofthiscastinplaceconcreteanchorboltdesigncalculationexamplesothatyouwillbeinphasewiththispart(part3)ofthecalculation.HerewewillcalculatethepulloutstrengthoftheIn"Engineeringdesign"

    ExampleofConcreteAnchorBoltDesignCalculationPart7:DeterminingPryoutStrengthofAnchorinTensionInthispartoftheconcreteanchorboltdesigncalculationexamplewewillcalculatetheconcretepryoutstrengthundershearforceappliedtothestructuralcastinplacefoundationanchorboltofthecolumnshownintheFigure1and2ofthePart1ofthisIn"Engineeringdesign"

  • 12/01/2016 ACI318AppendixDConcreteAnchorFoundationBoltDesignCalculationswithExampleCalculatingSteelStrengthinShear

    http://blog.mechguru.com/machinedesign/exampleofconcreteanchorboltdesigncalculationpart5determiningsteelstrengthofanchorboltinshear/ 1/3

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    ExampleofConcreteAnchorBoltDesignCalculationPart4:DeterminingSidefaceBlowoutStrengthofAnchorinTension

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    ExampleofConcreteAnchorBoltDesignCalculationPart5:DeterminingSteelStrengthofAnchorBoltinShearInthispart(part5),wewillseetheconcreteanchorboltdesigncalculationexampleforcalculatinganchormaterial(steel)strengthinshearaccordingtotheACI318appendixDcodes.Butbeforethat,pleasegothroughtheproblemstatementandpart1,part2,part3andpart4ofthisseries.

    Calculation

    TheformulafordeterminingthesteelstrengthinsheargivenintheAmericanConcreteInstitutecodeis:

    Steelstrengthinshear,Nsa=nAse,Nfuta..D19

    Where,

    Strengthreductionfactoranditsvalueforductileanchorboltinshearthevalueofitis0.65

    NsaNominalshearstrengthofthegroupofanchorinlb

    nTotalanchornumberinthegroup,inourcasethevalueis4

    Ase,NEffectivecrosssectionalareaofasingleanchor,thevalueofitforthe0.75inchanchorboltis0.334squareinch.

    futaSpecifiedtensilestrengthforasingleanchor(tobeobtainedfrommanufacturerscatalog)inpsi,inourcasethevalueis75000psi.

    Now,byputtingthevaluesintheequationD19explainedabove,wecanobtainthevalueofthesteelstrengthforthegroupofanchoris:

    Nsa=0.65*4*0.334*75000=65130lb

    Youmighthavealreadyobservedthatonlydifferencebetweencalculatingthecastinplaceanchorboltmaterialstrengthinshearandintensionisthestrengthreductionfactor.Forshearitis0.65andfortension0.75.Also,pleaserememberthatinboththecasesweused

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    ExampleofConcreteAnchorBoltDesignCalculationPart4:DeterminingSidefaceBlowoutStrengthofAnchorinTension

    InthispartwewillcalculatethesidefaceblowoutstrengthoftheconcreteanchoraccordingtotheACI318Appendix...

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  • 12/01/2016 ConcreteAnchorFoundationBoltDesignCalculationswithExampleAccordingtoACI318AppendixDBreakoutStrengthinShear

    http://blog.mechguru.com/machinedesign/exampleofconcreteanchorboltdesigncalculationpart6determiningconcretebreakoutstrengthofanchorinsh 1/6

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    ExampleofConcreteAnchorBoltDesignCalculationPart6:DeterminingConcreteBreakoutStrengthofAnchorinShearBeforedivingintotheconcreteanchorboltdesigncalculationexampleforcalculatinganchorbreakoutstrengthinshear,pleasegothroughtheproblemstatementandpart1,part2,part3,part4andpart5ofthisseries.ThecalculationexerciseiscarriedoutaccordingtotheACI318appendixDcodes.

    Calculation

    Thecodegivesthefollowingformulaforfindingoutthebreakoutstrengthinshearforagroupofanchorbolts:

    Vcbg=(AVc/AVco)ec,Ved,Vc,Vcp,VVb..D22

    Where,

    Strengthreductionfactorforbreakoutstrengthanditsvaluefornonreinforcementintensionis0.70

    Avcprojectedconcretefailureareaofthegroupofanchors,forcalculationofstrengthinshear(ininch2)asapproximatedbyarectanglewithedgesboundedby1.5*Ca1(1.5*5=7.5inchinourcase)andthefreeedgesoftheconcretefromthecenterlineoftheanchors.Wewillcalculateitlittlelater.

    Ca1Distancefromthecenterofananchorshafttotheedgeofconcreteinonedirection(ininch).ReferFig.1below.

    AvcoTotalprojectedshearfailureareaapproximatedbyasquareboundedby1.5*Ca1(1.5*5=7.5inchinourcase)fromthecenterlineofaanchoratallthesides.Wewillcalculateitlittlelater.

    ec,VModificationfactorfortheanchorgrouploadedeccentricallyinshear,inourcasethereisnoeccentricloading,soec,V=1.

    ed,VModificationfactorforedgeeffectfortheanchorgroupinshear,wewillcalculateitlater.

    c,VModificationfactorbasedonthepresenceandabsenceofcrackintheconcrete,inourcasevalueofit=1..

    cp,VModificationfactorforpostweldtypesofanchor.Forcastinplaceanchorcp,V=1

    VbBasicconcretebreakoutstrengthforasingleanchorinshear,wewillcalculateitlater.

    CalculationofAVc

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  • 12/01/2016 ConcreteAnchorFoundationBoltDesignCalculationswithExampleAccordingtoACI318AppendixDBreakoutStrengthinShear

    http://blog.mechguru.com/machinedesign/exampleofconcreteanchorboltdesigncalculationpart6determiningconcretebreakoutstrengthofanchorinsh 2/6

    Fig.1:ShowingCa1forcalculatingAvcandAvcoforAnchorGroup

    Fig.2:AnchorBoltElevationforcalculatingAvc

    Refertheabovetwofigure(Fig.1andFig.2),itshouldbeclearbynowthat

    AVC=16.5*(5+6+16.5)=453.75inch2

    CalculationofAVco

  • 12/01/2016 ConcreteAnchorFoundationBoltDesignCalculationswithExampleAccordingtoACI318AppendixDBreakoutStrengthinShear

    http://blog.mechguru.com/machinedesign/exampleofconcreteanchorboltdesigncalculationpart6determiningconcretebreakoutstrengthofanchorinsh 3/6

    Fig.3:AnchorBoltElevationforcalculatingAvco

    Byreferringtheabovefigure(Fig.3),wecancalculate

    Avco=16.5*(16.5+16.5)=544.5inch2

    Calculationofed,V

    ForCa2

  • 12/01/2016 ConcreteAnchorFoundationBoltDesignCalculationswithExampleAccordingtoACI318AppendixDBreakoutStrengthinShear

    http://blog.mechguru.com/machinedesign/exampleofconcreteanchorboltdesigncalculationpart6determiningconcretebreakoutstrengthofanchorinsh 4/6

    So,byputtingallthevalues,theaboveequation(D24)becomes

    Vb=(7*0.75*[10/0.75]0.2)*1*(4000)*111.5

    =23482.02lb

    Now,fromtheequationD22,afterputtingallthevaluesatrighthandside,

    Vcbg=(AVc/AVco)ec,Ved,Vc,Vcp,VVb

    =0.7*(453.75/544.5)*1*0.79*1*1*23482.02lb

    =10821.297lb

    TheconcretebreakoutstrengthinshearfortheanchorboltgroupaccordingtotheACIcodesiscalculatedas10821.297lb.Thenextpart(Part7)willtalkaboutConcretePulloutStrengthinShear.

    AboutShibashisGhoshShibashisisamechanicaldesignengineerbyprofessionandwriter/bloggerbypassion.Hehasworkedinvariousdesignprojectsinautomobile,powerplantandheavyearthmovingequipmentdomainsince2005.Inhissparetimeapartfrommaintainingthisblog,heenjoyinvestingtimebuildinghisfirstRCplane

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    2comments

    1.

    asad

    September7,2013at10:48am(UTC5.5)

    nycjob

    2.

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    ExampleofConcreteAnchorBoltDesignCalculationPart4:DeterminingSidefaceBlowoutStrengthofAnchorinTensionInthispartwewillcalculatethesidefaceblowoutstrengthoftheconcreteanchoraccordingtotheACI318AppendixDcodesandalsoconsolidatetheresultsofthedifferenttypesofanchorstrengthsintensionwehavecalculatedsofar.PleaseIn"Engineeringdesign"

    ExampleofConcreteAnchorBoltDesignCalculationPart2:DeterminingConcreteBreakoutStrengthofAnchorinTensionIn"Engineeringdesign"

    ExampleofConcreteAnchorBoltDesignCalculationPart7:DeterminingPryoutStrengthofAnchorinTensionInthispartoftheconcreteanchorboltdesigncalculationexamplewewillcalculatetheconcretepryoutstrengthundershearforceappliedtothestructuralcastinplacefoundationanchorboltofthecolumnshownintheFigure1and2ofthePart1ofthisIn"Engineeringdesign"

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  • 12/01/2016 ConcreteAnchorFoundationBoltDesignCalculationswithExampleasperACI318AppendixDPart7PryoutStrengthinShear

    http://blog.mechguru.com/machinedesign/exampleofconcreteanchorboltdesigncalculationpart7determiningpryoutstrengthofanchorintension/ 1/4

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    ExampleofConcreteAnchorBoltDesignCalculationPart8:InteractionofTensileandShearForces

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    ExampleofConcreteAnchorBoltDesignCalculationPart7:DeterminingPryoutStrengthofAnchorinTensionInthispartoftheconcreteanchorboltdesigncalculationexamplewewillcalculatetheconcretepryoutstrengthundershearforceappliedtothestructuralcastinplacefoundationanchorboltofthecolumnshownintheFigure1and2ofthePart1ofthisdesigncalculationseries.

    WhatisConcretePryoutStrength?

    Thisissomethingrelatedtothecomingoutoftheshortandstiffanchorsbybreakingorchippingtheconcreteatthedirectionoppositetotheappliedshearforcetothecolumn.

    DesignCalculation

    ThecodeACI318AppendixDgivesthefollowingequation:

    Vcpg=kcpNcbgD31

    Where,

    Strengthreductionfactorforpryoutstrengthanditsvaluefornonreinforcementintensionis0.70

    VcpgPryoutstrength

    kcpFactor,whichhasvalue=2fortheanchorlongerthan2.5inch.

    NcbgConcretebreakoutstrengthintension(=20694.6131lb,ReferPart2)fortheanchorgroup.

    Now,byputtingallthevalueswegetthepryoutstrength,

    Vcpg=28972.45lb

    SummaryofCalculatedStrengthValuesinShear

    Throughthepart5,Part6,andthispartwehavecomeoutwiththefollowingshearstrengthvalues:

    Nominalmaterialstrengthinfortheanchors(Vsa)=65130lb

    Concretebreakoutstrengthfortheanchorgroup(Vcbg)=10821.297lb

    Pryoutstrengthoftheanchorgroup(Vpn)=28972.45lb

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  • 12/01/2016 ConcreteAnchorFoundationBoltDesignCalculationswithExampleasperACI318AppendixDPart7PryoutStrengthinShear

    http://blog.mechguru.com/machinedesign/exampleofconcreteanchorboltdesigncalculationpart7determiningpryoutstrengthofanchorintension/ 2/4

    Outofthesethreestrengthvaluesthesmallestonewillbethedesignstrength.

    So,thedesignstrengthinshear=10821.297lb

    Fromtheproblemstatement(part1),youcanobservethatappliedfactoredshearforcetothecolumn=2300lb.

    Since,designstrengthinshearismuchlowerthanthefactoredappliedshearforce,so,theanchorboltsaresafeundershearloading.

    Inthenextpart(Part8)ofthisconcreteanchorfoundationboltdesigncalculationexamplewewillseetheinteractionoftensileandshearforcesaccordingtotheACI318D.

    AboutShibashisGhoshShibashisisamechanicaldesignengineerbyprofessionandwriter/bloggerbypassion.Hehasworkedinvariousdesignprojectsinautomobile,powerplantandheavyearthmovingequipmentdomainsince2005.Inhissparetimeapartfrommaintainingthisblog,heenjoyinvestingtimebuildinghisfirstRCplane

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    2comments

    1.

    ThilakeshKumar

    April30,2012at10:27am(UTC5.5)

    ifanybodydesigninanchorboltmodelplzuploadit.wewantsomemodels

    2.

    ThilakeshKumar

    April30,2012at10:28am(UTC5.5)

    IamlookingatrationaldesigncriteriaforAnchorbolts

    1.Edgedistance2.Embedmentlength3.Sleeverequirements4.Projectionofanchorabovegroutcalculations

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    ExampleofConcreteAnchorBoltDesignCalculationPart4:DeterminingSidefaceBlowoutStrengthofAnchorinTensionInthispartwewillcalculatethesidefaceblowoutstrengthoftheconcreteanchoraccordingtotheACI318AppendixDcodesandalsoconsolidatetheresultsofthedifferenttypesofanchorstrengthsintensionwehavecalculatedsofar.PleaseIn"Engineeringdesign"

    ExampleofConcreteAnchorBoltDesignCalculationPart3:DeterminingPulloutStrengthofAnchorinTensionPleaserefertheproblemstatementandthepart1,part2ofthiscastinplaceconcreteanchorboltdesigncalculationexamplesothatyouwillbeinphasewiththispart(part3)ofthecalculation.HerewewillcalculatethepulloutstrengthoftheIn"Engineeringdesign"

  • 12/01/2016 ConcreteAnchorFoundationBoltDesignCalculationswithExampleasperACI318AppendixDPart8InteractionofTensileandShearForces

    http://blog.mechguru.com/machinedesign/exampleofconcreteanchorboltdesigncalculationpart8interactionoftensileandshearforces/ 1/3

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    ExampleofConcreteAnchorBoltDesignCalculationPart7:DeterminingPryoutStrengthofAnchorinTension

    DifferencebetweenDMADVandDMAIC

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    ExampleofConcreteAnchorBoltDesignCalculationPart8:InteractionofTensileandShearForcesInthispartoftheconcreteanchorboltdesigncalculationexamplewewillseetheinteractionoftensileandshearforcesforthestructuralcastinplacefoundationanchorboltofthecolumn.PleaserefertheFigure1and2ofthePart1ofthisanchordesignseries.

    WhattheACI318Codessays

    If,thefactoredshearload(2300lbinourcase,referpart1)>0.2*designstrengthinshear(10821.297lbinourcase,referpart7)

    And,thefactoredtensileload(20000lbinourcase,referpart1)>0.2*designstrengthintension(20694.6131lbinourcase,referpart4)

    Then,

    (factoredshearload/designstrengthinshear)+(factoredtensileload/designstrengthintension)>Findmoreaboutmeon:

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    ExampleofConcreteAnchorBoltDesignCalculationPart7:DeterminingPryoutStrengthofAnchorinTension

    Inthispartoftheconcreteanchorboltdesigncalculationexamplewewillcalculatetheconcretepryoutstrengthunder...

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