Manual for the Seismic of Steel and Concrete Buildings to Eurocode 8
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Transcript of Manual for the Seismic of Steel and Concrete Buildings to Eurocode 8
-
5/21/2018 Manual for the Seismic of Steel and Concrete Buildings to Eurocode 8
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Manualfortheseismicdesigno
fsteelandconcretebuildingstoEurocode8
May2010
Guidepourlaconceptionparasismiquedesbtimentsenacierouenbtons
elonlEurocode8
mai2010
Manual for the seismic
design of steel and concrete
buildings to Eurocode 8
May 2010
Guide pour la conception
parasismique des btiments
en acier ou en bton
selon lEurocode 8mai 2010
Supporting sponsor
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Ac
know
led
gemen
ts
Permission
toreproduceextractsfromBSEN199
8-1:2004isgranted
byBSI.BritishStandardscanbeobtainedinPDF
orhardcopyformats
fromtheBS
Ionlineshop:www.bsigroup.com/Sho
porbycontacting
BSICustom
erServicesforhardcopiesonly:Tel:+
44(0)2089969001,
Email:[email protected]
Figure8.1isprovidedcourtesyofMEEDDAT,figur
e8.2isprovided
courtesyof
theBritishGeologicalSurveyandfigure8.3isprovided
courtesyof
theEuropeanSeismologicalCommission.Figures10.24,
10.26,10.2
7,10.29and10.30areprovidedcourtesyofCERIB.
Figures11.
7and11.8areadaptedfromANSI/AIS
C358.
LaFigure8
.1estreproduiteaveclaimableautoris
ationduMEEDDAT,
lafigure8.2
estreproduiteaveclaimableautorisationduBritish
Geological
Surveyetlafigure8.3estreproduitea
veclaimable
autorisation
delaEuropeanSeismologicalComm
ission.Lesfigures
10.24,10.2
6,10.27,10.29et10.30sontreproduitesaveclaimable
autorisation
duCERIB.Lesfigures11.7et11.8so
ntadaptesde
lANSI/AISC
358.
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Manualfortheseismicd
esign
ofsteela
ndconcretebuildings
toEuroco
de8
May2010
Guidepo
urlaconception
parasism
iquedesbtiments
enacierouenbton
selonlEurocode8
mai2
010
Supportingsponso
r
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Som
maire
Tablea
ux
x
Termin
ologieetNotations
xi
Avant-
Propos
xxi
1
Objectifetdomainedapplication
1
1.1
Objectif
1
1.2
SystmedesEurocodes
2
1.3
DomainedapplicationduManuel
3
1.3.1
Gnralits
3
1.3.2
BasesduManuel
5
1.3.3
Autresprescriptionsgnrales
5
1.3.4
AutresexclusionsdudomainedapplicationduManuel
6
1.4
Contenu
7
2
Documentsderfrence
8
2.1
AutresEurocodes
8
2.2
Avant-proposetAnnexesNationaux
8
2.3
DocumentationadditionnelledelAFNORetduBSI
8
2.4
AutresmanuelsdeconceptionselonlesEurocodes
9
2.5
Autressourcesdinformation
9
2.5.1
GuidesdeconceptionselonlesEurocod
es
9
2.5.2
Sitesweb
9
2.5.3
GuidesAFPS
10
3
AnnexesNationalesetParamtresDterminsNationalement
11
3.1
ObjectifsdesAnnexesNationales
11
3.2
TraitementdesParamtresDterminsNationale
ment
11
3.3
AnnexesNationalesfranaises
11
3.4
AnnexesNationalesbritanniques
12
4
Objectifsdeperformance
13
4.1
Introduction
13
4.2
Prescriptiondenoneffondrement
13
4.3
Prescriptiondelimitationdedommage
14
5
Principesdeconception
15
5.1
Caractristiquessouhaitablespourdesbtimentsrsistantausisme
15
5.2
lmentsprimairesetsecondaires
16
5.3
Structuresetzonesdissipatives
16
v
The
InstitutionofStructuralEngineersGuidepourlaconceptionparasismiquedesbtimentsenacierouenbtonselonlEC8
Contents
Tables
x
TerminologyandNotatio
ns
xi
Foreword
xxi
1
Aima
ndscope1
1.1
Aim
1
1.2
TheEurocodesystem
2
1.3
ScopeofManual
3
1.3.1
General
3
1.3.2
BasisoftheManual
5
1.3.3
Othergene
ralrequirements
5
1.3.4
OtherexclusionsfromthescopeofthisManual
6
1.4
Contents
7
2
Referencedocuments
8
2.1
OtherEurocodes
8
2.2
NationalForewords
andAnnexes
8
2.3
AFNORandBSIsup
portingdocumentation
8
2.4
OtherEurocodemanuals
9
2.5
Othersourcesofinf
ormation
9
2.5.1
Designers
guidestotheEurocodes
9
2.5.2
Websites
9
2.5.3
AFPSguides
10
3
NationalAnnexes
andNationallyDeterminedParameters
11
3.1
PurposeoftheNationalAnnexes
11
3.2
TreatmentofNation
allyDeterminedParameters
11
3.3
FrenchNationalAnnexes
11
3.4
UKNationalAnnexe
s
12
4
Performanceobjectives
13
4.1
Introduction
13
4.2
Nocollapserequirement
13
4.3
Damagelimitationrequirement
14
5
Designfundamentals
15
5.1
Desirablecharacteristicsofearthquakeresistantbuildings
15
5.2
Primaryandsecond
aryelements
16
5.3
Dissipativestructuresandzones
16
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13
Jointssismiques
162
14
Limitationdesdommages
163
15
lmentsnonstructuraux
165
15.1
Considrationsgnrales
165
15.2
Protectiondeslmentsnonstructurauxsensible
slacclration
165
15.2.1
Introduction
165
15.2.2
Procduresimplifie
165
15.2.3
Coefficientsismique
166
15.2.4
Coefficientsdimportance
167
15.2.5
Coefficientdecomportement
167
15.3
Protectiondeslmentsnonstructurauxsensible
saudplacementrelatif
168
15.3.1
Gnralits
168
15.3.2
Maonneriesderemplissageaucontactdossaturesenacierouen
bton
169
Rfre
nces
171
AnnexeA:Exemplesdecalculdesrayonsdetorsionetdurayondegiration
175
ix
The
InstitutionofStructuralEngineersGuidepourlaconceptionparasis
miquedesbtimentsenacierouenbtonselonlEC8
Sommaire
13
Seismicjoints162
14
Damagelimitation
163
15
Non-structuralele
ments
165
15.1
Generalconsiderations
165
15.2
Protectionofaccele
ration-sensitivenon-structuralelements
165
15.2.1
Introduction
165
15.2.2
Simplifiedprocedure
165
15.2.3
Seismicco
efficient
166
15.2.4
Importancefactors
167
15.2.5
Behaviourfactors
167
15.3
Protectionofdrift-sensitivenon-structuralelements
168
15.3.1
General
168
15.3.2
Masonryin
fillincontactwithconcreteandsteelmomentre
sistingframes
169
References
171
AppendixA:Exampleca
lculationsoftorsionalradiiandradiusofgyration
175
TheInstitutionofStr
ucturalEngineersManualfortheseismicdesignofsteelandconcretebuildingstoEurocode8
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1.4
Contenu
Lepr
sentManuelcouvrelesaspectsdeconceptionparasismiquesuivants.
Que
lquesprincipesgnrauxdeconception
etdecalculsismique.
Des
mthodessimplifiesdecalculsismique.
Des
exigencespourledimensionnementfinaldesfondationsetdes
lm
entsstructurelsdanslesconditionsde
sollicitationsismique,venant
enc
omplmentdecellesrequisessouscha
rgementspermanents
ouv
ariables.Danscertainscas,seuleunep
artiedesdtailsde
dimensionnementestprsentedansceMa
nuele
tilconvientalorsdese
repo
rterauxdocumentsdonnsenrfrenc
e.
7
The
InstitutionofStructuralEngineersGuidepourlaconceptionparasismiquedesbtimentsenacierouenbtonselonlEC8
1.4
Objectifetdomainedapplication
1.4
Contents
ThisManualcoversth
efollowingdesignstages.
Somegeneralprinciplesofseismicdesignandanalysis.
Simplemethodsofseismicanalysis.
Requirementsforthefinalsizingoffoundationsandstructuralmembersfor
seismicloadingconditions,additionaltothoserequiredforp
ermanentand
variableloadingcon
ditions.Insomecases,fulldetailsneededfordesign
arenotgivenandreferenceismadetosupportingdocumen
ts.
TheInstitutionofStructuralEngineersManualfortheseismicdesignofsteelandconcretebuildingstoEurocode8
7
1.4
Aimandscope
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Autres
siteswebpertinents:
www.planseisme.fr
www.sisfrance.net
www.lesgrandsateliers.fr
2.5.3
GuidesAFPS
Guide
desdispositionsconstructivesparasism
iquesdesouvragesenacier,
bton,boisetmaonnerie20
Conceptionparasismiquedesbtiments21
Mtho
desenDplacement:PrincipesCodificationApplicationCahier
Techn
iqueAFPSn2622
10
TheInstitutionofStructuralEngineersGuidepourlaconceptionparas
ismiquedesbtimentsenacierouenbtonselonlEC8
2.5
Docum
entsderfrence
Otherrelevantwebsitesincludethefollowing:
www.planseisme.fr
www.sisfrance.net
www.lesgrandsateliers.fr
2.5.3
AFPSguides
Guidedesdispositionsconstructivesparasismiquesdesouvragesenacier,
bton,boisetmaonnerie20
Conceptionparasismiquedesbtiments21
MthodeenDplacem
ent:PrincipesCodificationApplicationCahier
TechniqueAFPSn26
22
TheInstitutionofStru
cturalEngineersManualfortheseismicdesignofsteelandconcrete
buildingstoEurocode8
10
2.5
R
eferencedocuments
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4.3
Prescriptiondelimitationdedom
mage
LEC8
prescritquelastructuredoittreconu
eetconstruitepourrsister
uneactionsismiqueayantuneprobabilitdeseproduireplusgrandeque
lactionsismiquedecalcul,sansquilseprodu
isededommageprovoquant
deslim
itationsdusage,dontlecotseraitdisproportionnparrapportau
cotd
elastructureelle-mme.EnFrance,lactionsismiquepourlalimitation
dedommageestdfinieparlarglementation
,sansrfrenceunepriode
deretour.LAnnexeNationalebritanniquelEC8Partie1stipule:En
labsencedunespcificationparticulireauprojet,ilconvientdadopter
lesvaleursrecommandes.Desdirectivescomplmentairessontdonnes
danslePD6698.IlestindiqudanslePD6698:20081quedanslaplupart
descasleniveaudemouvementsismiqueappropripourlalimitationde
domm
ageestsuffisammentfaibleauRoyaum
e-Unipourquecettatlimite
nesoitpasdterminant.
Lesr
glesdeconceptiondonnesauChapitre14duprsentManuelvisent
principalementrespecterlaprescriptiondelimitationdedommage.
14
Th
eInstitutionofStructuralEngineersGuidepourlaconceptionparas
ismiquedesbtimentsenacierouenbtonselonlEC8
4.3
Objectifsdeperformance
4.3
Damagelimitationrequirement
EC8requiresthatthe
structureshouldbedesignedandconstructedto
withstandaseismicactionhavingalargerprobabilityofoccur
rencethan
thedesignseismicaction,withouttheoccurrenceofdamage
andthe
associatedlimitations
ofuse,thecostsofwhichwouldbedisproportionately
highincomparisonwiththecostsofthestructureitself.InFrance,
theseismicactionsfordamagelimitationaredefinedbyregulation,
withoutreferencetoa
givenreturnperiod.TheUKNationalAn
nexto
EC8Part1states:In
theabsenceofaprojectspecificassessment,
adopttherecommend
edvalues.FurtherguidanceisgiveninPD6698.
PD6698:20091notes
thatinmostcases,thelevelofdesignm
otions
appropriatefordamag
elimitationconsiderationsintheUKissufficientlylow
thatthislimitstatewillnotgovern.
ThedesignrulesgiveninChapter14ofthisManualareprimarilyintendedto
meettherequirement
fordamagelimitation.
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cturalEngineersManualfortheseismicdesignofsteelandconcrete
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4.3
Performanceobjectives
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Notes
a
Lesbtime
ntsayantuneformeenplandiffrentepeuvent
tredivissenblocsdeforme
rectangulairecompacteenintroduisantdesjointsstructurels
,sousrservequeceuxci
aientunela
rgeuradquate(Chapitre13).
bDanscescas,u
nevrificationdtailleselonlaSection6.3.3estncessaireaustadede
lavantprojetprliminaire.
cLavrificationdesrglespluscompltesdelaSection6.3.3
esttoujoursrequiseaustade
finaldudim
ensionnement.
Fig6.1
Dfinitiond
elexcentricitentrecentredemasseetcentrederaideur
Note
Xestlaplusgran
delongueurXHY
Centrederaideur
Centred
emasses
eoy
eox
X
Y
27
TheInstitutionofStructuralEngineersGuidepourlaconceptionparas
ismiquedesbtimentsenacierouenbtonselonlEC8
6.3
Rgularitenplanetenlvation
Notes
aBuildingswithotherplanshapesmaybedividedintomorecompactre
ctangular
shapesbytheintroduc
tionofstructuraljoints,p
rovidedthejointwidthsareadequate
(Chapter13).
bForthesecases,adetailedchecktoSection6.3.3
isrequiredatprelim
inarydesign
stage.
cCheckstothemoreco
mpleterulesofSection6.3.3
arealwaysrequiredforfinal
design.
Fig6.1
Definitionofmass-stiffnesseccentricity
Note
Xistakenasthelongerside,
soXHY
Centreofstiffness
Centreofmass
eoy
eox
X
Y
TheInstitutionofStru
cturalEngineersManualfortheseismicdesignofsteelandconcrete
buildingstoEurocode8
27
6.3
Regularity
inplanandelevation
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(
)
(
)
x
EI
xEI
y
EI
yEI
cs
yy
cs
xx
.
.
//
//
(6.3)
2
2
2
2
(
)
{(
)
(
)
}
(
)
{(
)
(
)
}
r
EI
xx
EI
yy
EI
r
EI
xx
EI
yy
EI
x
y
cs
y
cs
x
y
x
cs
y
cs
x
.
.
-
+
-
-
+
-
/
/
/
/
(6.4)
Leray
ondegirationlsestlaracinecarredurapportdumomentpolaire
dinertiemassiquelamasse,lemomentpolairedinertiemassiquetant
calculparrapportaucentredemasse.Pour
unbtimentrectangulairede
cts
letbetunedistributionuniformedema
sse,lEquation6.5sapplique.
(
)/
l
l
b
12
s
2
2
=
+
(6.5)
Fig6.3
Calculapproximatifdesrayonsdetorsionpou
rlesbtimentspossdantunseul
typede
systmedecontreventement
y
x
Raideurlaflexion,
directionx
EIx
Raideurlaflexion,
directiony
EIy
Coordonnesducentredell
ment
x,y
Coordonnes
du
centrederaid
eurxcs,
ycs
30
TheInstitutionofStructuralEngineersGuidepourlaconceptionparas
ismiquedesbtimentsenacierouenbtonselonlEC8
6.3
Rgularitenplanetenlvation
(
)
(
)
x
EI
xEI
y
EI
yEI
cs
yy
cs
xx
.
.
//
//
(6.3)
2
2
2
2
(
)
{(
)
(
)
}
()
{(
)
(
)
}
r
E
I
xx
EI
yy
EI
r
EI
xx
EIy
y
EI
x
y
cs
y
cs
x
y
x
cs
y
cs
x
.
.
-
+
-
-
+
-
/
/
/
/
(6.4)
Theradiusofgyration
lsisthesquarerootoftheratioofthepo
larmoment
ofinertiatothemass,
thepolarmomentofinertiabeingcalculatedabout
thecentreofmass.Fo
rarectangularbuildingofsidelengthslandb,anda
uniformmassdistribution,Equation6.5applies.
(
)/
l
l
b
12
s
2
2
=
+
(6.5)
Fig6.3
Approximatecalculationoftorsionalradiiforbuildingswithauniformtypeoflateral
loadresistingsystem
y
x
Flexuralstiffnessinxdirection
EIx
Flexuralstiffnessinydirection
EIy
Co-ordinatesofcentroidofelement
x,y
Centreofstiffness
co-ordinatesxcs,
ycs
TheInstitutionofStructuralEngineersManualfortheseismicdesignofsteelandconcretebuildingstoEurocode8
30
6.3
Regularity
inplanandelevation
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Fig6.4
Retraitsrguliers
(a)
L2
L3
L1
L4
0,1
5H
(d)
L2
L1
(b)(Leretra
italieuau-dessusde0,1
5H)
H
Critrepour(a):0
hs
/5
bfHhs
/15
109
TheInstitutionofStructuralEngineersGuidepourlaconceptionparasismiquedesbtimentsenacierouenbtonselonlEC8
10.7
Btimentsenbton
(1)Theconcretelocatedattheendsofthewalls(boundaryelement)is
confinedoveralengthlc,definedin(2)below.Thisbounda
ryelement
canincludeflange
sperpendiculartothewall.
Noconfinedboundaryelementisrequiredoverwallflange
swith
thicknessbfHhs/
15andwidthlfHhs/5,wherehsdenote
stheclear
storeyheight(Figu
re10.17).Nonetheless,confinedboundaryelements
mayberequireda
ttheendsofsuchflangesduetoout-of-planebending
ofthewall.
(2)Thelengthoftheb
oundaryelementisgivenas:
(.
;
.
;
(
.
/
))
max
l
l
b
x
015
1
50
1
00035
,
c
w
w
u
cu
c2
f
=
-
(10.38)
where:
xuistheneutrala
xisdepth;xucorrespondstotheultimatecurvature
andisgivenby:
(
)
x
v
blb
u
d
v
w
c0
~
=
+
(10.39)
Fig10.17
Wallflangewithoutconfinedboundaryelement
lf
bf
bwo
lf>
hs
/5
bfHhs
/15
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10.7
Concretebuildings
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mur.Lesdispositionsdarmaturesverticalesm
inimalestouslesniveaux
doiven
tconduireunebonnedistributiondelafissurationsurlahauteur
dechaquemur.LaFigure10.20proposeundiagrammelogiquepourle
dimensionnement.Desinformationscomplm
entairessurlecomportement
desmurslongsenbtonfaiblementarmspe
uventtretrouvesdans
Coin48e
tBisch49.
Fig10.20
Diagram
mepourledimensionnementdesmurslongsen
btonfaiblementarms
Danstoutesectionhorizontaledfavorab
ledumur
=>
MEd,
NEd,
V'Ed
VEd=V'Ed(1+q)/2
VEdGVRd,c
VERIFICATIONdeNdyn
VERIFICATIONDESREPRISESDEBETO
NNAGE
(toutessections)
PASDARMATURE
DEFFORTTRANCHANT
DISPOSITIONSCONSTRUCTIVES
VERIFICATIONSELONUN
MODELEDETREILLIS
OUI
N
ON
VERIFICATIONDEFLEXION
COMPOSE
EavecFISSURE
HOR
IZONTALE
113
TheInstitutionofStructuralEngineersGuidepourlaconceptionparasismiquedesbtimentsenacierouenbtonselonlEC8
10.7
Btimentsenbton
wall.Figure10.20providesasuggestedflowchartfordesign
.Additional
informationconcernin
gthebehaviouroflightlyreinforcedwallsmaybe
foundinCoin48andB
isch49.
Fig10.20
Flowchartforthedesignoflargelightlyreinforcedwalls
Inanyunfavourablehorizontalsectionofthe
wall
=>
MEd,
NEd,
V'Ed
VEd=V'Ed(1+q)/2
VEdGVRd,c
VERIFICATIONofNdyn
VERIFICATIONOFCONSTRUCTIONJOINTS
(allsections)
NOSHE
AR
REINFORCE
MENT
DETAILING
VE
RIFICATIONACCORDING
TOALATTICEMODEL
YES
NO
VERIFICATIONO
FBENDING
WITHAXIAL
FORCE
withHORIZONT
ALCRACK
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10.7.5
Informationcomplmentairesurlaconceptiondesmursenbtonarm
Ilestn
otquuneinformationcomplmentaire
surlecomportementdes
murslancsestdonnedansCAMUS50e
tsurlesmurstrapusfortement
arms
dansSAFE51.
10.8
Faonnagedesarmaturesdecon
finement
Pourlesarmaturesdeconfinementutilisescommearmaturestransversales
danslespoutres,lespoteauxoulesmurs,descadresfermsavecdes
extrm
itscoudes135etayantdesretoursdelongueur10dbwdoivent
treutiliss(Figure10.22(a)).
Ilestrecommanddutiliserdespinglesavec
uncrochet180une
extrm
itetunretour135lautreextrmit(Figure10.22(b)).Des
recom
mandationssupplmentairessurlesdis
positionsconstructivesdes
armaturesdansleGuideAFPS20.
Fig10.22
Faonnagedesarmaturesdeconfinement
45
10dbw
Epingle
(a)Cadressismiques
(b)Epinglessismiques
10dbw
45
maxi
117
TheInstitutionofStructuralEngineersGuidepourlaconceptionparasismiquedesbtimentsenacierouenbtonselonlEC8
10.8
Btimentsenbton
10.7.5
Furtherinformationonreinforcedconcretewalldesign
Itmaybeobservedthatfurtherinformationonthedesignofslenderductile
shearwallsisgivenby
CAMUS50andonsquatheavilyreinforc
edwallsis
givenbySAFE51.
10.8
Detailingofconfinementreinforcement
Forhoopsusedastra
nsversereinforcementinbeams,columnsorwalls,
closedstirrupswith135hooksandextensionsoflength10dbwshouldbe
used(Figure10.22(a)).
Itisrecommendedtha
tcrosstiesshouldbedetailedwitha18
0hookatone
endanda135hookattheother(Figure10.22(b)).Reference
maybemade
toanAFPSguide20forfurtherguidanceonreinforcementdeta
iling.
Fig10.22
Detailingofconfinementreinforcement
45
45
maxi
10dbw
Crosstie
(a)Seismichoops
(b)Seismiccrossties
10dbw
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Fig10.25
Exempledepoteauxeninteractionavecla
maonnerieetncessitantdes
dispositionsconstructivesspcifiques
A
B
C
D
E
F
Note
L
espoteauxA,B,
C,D,EetFdoiventetrecon
uscommedeszonescritiques
s
urtouteleurhauteur,saufaurez-de-chaussee
oucettedispositionest
a
pplicableatouslespoteauxperipheriques.
Fig10.26
Remplissagepartielenmaonneriedispositiondesarmaturesdeffort
tranchantdanslespoteaux
>1,5
hc
lcl
hc
1.5
hc
lcl
hc