Download - Limit State Table: Connection Available Strength · Sidewalls 4 Local Crippling of HSS Chord Sidewalls 5 Local Buckling of HSS Chord Sidewalls 6 Local Yielding of HSS Branch(es) Due

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Limit State Table: Connection Available StrengthTruss | Rectangular HSS-to-HSS Truss Connections

Bej=10

Bbj/tbj

Fybjtbj Bbi ≤ Bbi( )Fybitbi

Bei=10B/t

Fyt Bbi ≤ Bbi( )Fybitbi

TRUSSLIMITSTATETABLE2.12.20

Page1of1

ROWNO.COLNO.

1 PlastificationoftheHSSChordConnectingFace

2 ShearYielding(Punching)oftheHSSChordConnectingFace

3 LocalYieldingofHSSChordSidewalls

4LocalCripplingofHSSChordSidewalls

5 LocalBucklingofHSSChordSidewalls

6LocalYieldingofHSSBranch(es)DuetoUnevenLoadDistribution

7 ShearYieldingofHSSChordSidewall

LIMIT STATE TABLE: CONNECTION AVAILABLE STRENGTH

AISCSpecificationandManualReferences

LimitState

AISC360-10and14thEd.Manual AISC360-16and15thEd.Manual


AISC360-10and14thEd.Manual

AISC360-16and15thEd.Manual


I J K L M N P Q

Whenβ<0.85:SpecEq.(K2-7)

TableK2.2

SubjecttolimitsinTableK2.2A

SpecSectionJ10.10,J4.5,andManualEq.(9-30):

Rn=PnsinθT=Bc=Bb

a=b=(B-Bb)/2

L=lb=Hb/sinθ

QfperSpecEq.(K2-3)withB/t<30perManual

page9-15

WhereconnectionisappliedclosetotheHSSmemberendperEq.(9-30),

Rnshallbereducedby50%

Whenβ<0.85:SpecEq.(K2-7)

TableK2.2


SpecSectionJ10.10,J4.5,andManualEq.(9-30):

Rn=PnsinθT=Bc=Bb

a=b=(B-Bb)/2

L=lb=Hb/sinθ

QfperSpecEq.(K2-3)withB/t<30perManual

page9-15

WhereconnectionisappliedclosetotheHSSmemberendperEq.(9-30),Rnshall

bereducedby50%

Spec.Eq.(K2-14)TableK2.2




_ _

For0.85<β<1-1/γorB/t<10:

SpecEq.(K2-8)TableK2.2


SpecSectionJ10.10andManualEq.(9-29)

Rn=Pnsinθ

tp=tdesofchord

Fy=Fyofchord

L=Hb/sinθ

ceff=BeSpecEq.(K1-1)butdeleting

the(Fyt/Fybtb)term(SeeNote8)

φ =0.95,Ω=1.58

WhereconnectionisappliedatadistancefromtheHSSmemberend

lessthan[B*sqrt(1-β)],Rnshallbereducedby50%.

SeeNote3

For0.85<β<1-1/γorB/t<10:

SpecEq.(K2-8)TableK2.2


SpecSectionJ10.10andManualEq.(9-29)

Rn=Pnsinθ

tp=tdesofchord

Fy=Fyofchord

L=Hb/sinθ

ceff=BeSpecEq.(K1-1)butdeletingthe

(Fyt/Fybtb)term(SeeNote8)

φ =0.95,Ω=1.58

WhereconnectionisappliedatadistancefromtheHSSmemberendlessthan

[B*sqrt(1-β)],Rnshallbereducedby50% SeeNote3

WhenBb<B-2t:Spec.Eq.(K2-15)

TableK2.2


Noneedtocheckforsquarebranches

WhenBb<B-2t:Spec.Eq.(K3-8)

TableK3.2



_ _

Whenβ=1.0:SpecEq.(K2-9)

TableK2.2


ForconnectionsgreaterthandfromHSSmemberend,SpecEq.(J10-2):

Rn=Pnsinθ

tw=2*tdeslb=Hb/sinθ

k=cornerradius≥1.5*tdes

ForconnectionslessthandfromHSSmemberend,useSpecEq.

(J10-3)


TableK2.2


ForconnectionsgreaterthandfromHSSmemberend,

SpecEq.(J10-2):

Rn=Pnsinθ

tw=2*tdeslb=Hb/sinθ

k=cornerradius≥1.5*tdes

ForconnectionslessthandfromHSSmemberend,useSpecEq.(J10-3)

_ _ _ _


TableK2.2


SpecEq.(J10-4):

Rn=Pnsinθ

tw=tf=tdeslb=Hb/sinθ

d=H-3tdes

Rnshallbedoubledfor2HSSsidewalls

Tension:Qf=1.0

Compression:QfperSpecEq(K3-14)

TableK3.2

WhereconnectionisappliedatadistancefromtheHSSmemberend

lessthanH/2,useEqn(J10-5a)

Notlistedasitwasperceivedasnon-governing

SpecEq.(J10-4):

Rn=Pnsinθ

tw=tf=tdeslb=Hb/sinθ

d=H-3tdes


Tension:Qf=1.0

Compression:QfperSpecEq(K3-14)

TableK3.2

WhereconnectionisappliedatadistancefromtheHSSmemberendlessthanH/2,

useEqn(J10-5a)

_ _ _ _

_ _


TableK2.2


SpecEq.(J10-8):

Rn=Pnsinθ

tw=tdesh=H-3tdes


WhereconnectionisappliedatadistancefromtheHSSmemberendlessthanH/2,

Rnshallbereducedby50%

_ _ _ _

Whenβ>0.85:SpecEq.(K2-12)

TableK2.2


Spec.Eq.J4-1usingBeperSpecEqn.(K1-1):

Ag=tb(2Hb+2Be-4tb)

When β>0.85:SpecEq.(K2-12)

TableK2.2


Spec.Eq.(J4-1)usingBeperSpecEqn.(K1-1):

Ag=tb(2Hb+2Be-4tb)




orifB/t>15




orifB/t>15

Spec.Eq.(K2-17)to(K2-22)TableK2.2


Spec.Eq.(K3-10)to(K3-13)TableK3.2

Beiistheeffectivewidthoftheoverlappingbranch'i'whentheheeloftheoverlappingtransversebranchwall

landsonthesurfaceofthechord.

Bejistheeffectivewidthofthe

overlappedbranch'j'whentheheeloftheoverlappingtransversebranchwalllandsonthesurfaceoftheoverlapped

branch.SeeBejequationbelow.


_ _

Forθ<90degreesandinProjectedGapRegion:

SpecSectionG5andEq.(G2-1):

Vn=Pnsinθ

Aw=2htdesh=H-3tdes

CvperSectG2.1.b

withkv=5


InProjectedGapRegionBetween

InclinedBranches,wherecosθ>Hb/H:

SpecEq.(G4-1):

Vn=Pnsinθ

Aw=2htdesh=H-3tdes

Cv2perSectG2.2

withh/tw=H/tdes,kv=5

See Note 7

IntheGapRegion:

SpecSectionG5andEq.(G2-1):

Vn=Pnsinθ

Aw=2htdes

h=H-3tdes

CvperSectG2.1.b

withkv=5


Checknotnecessaryforsquarechords

IntheGapRegion:

SpecEq.(G4-1):

Vn=Pnsinθ

Aw=2htdes

h=H-3tdes

Cv2perSectG2.2

withh/tw=H/tdes,kv=5


Checknotnecessaryforsquarechords. See Note 7

_ _

LIMITSTATETABLE:CONNECTIONAVAILABLESTRENGTHHSS-TO-HSSTRUSSCONNECTIONS

GappedK-Connections

RECTANGULARHSS-TO-HSSTRUSSCONNECTIONS

T-andY-Connections OverlappedK-ConnectionsCrossConnections

𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵= 10/𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵/𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵 𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵≤ 𝐵𝐵𝐵𝐵𝐵𝐵𝐵

𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵= 10/𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵/𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵 𝐵𝐵𝐵𝐵𝐵𝐵𝐵 𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵 ≤𝐵𝐵𝐵𝐵𝐵𝐵𝐵

See the Limit State Table Notes PDF available for download.

Bej =10 Fybjtbj Bbi < Bbi( )Bbj /tbj Fybitbi

Bei =10 Fyt Bbi < Bbi( )B/t Fybitbi