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


2/209

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

TheInstitutionofSt

ructuralEngineersManualfortheseismicdesignofsteelandconcre

tebuildingstoEurocode8

v


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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

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ix

Contents


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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


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.




14

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



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




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



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


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

TheInstitutionofStruct

uralEngineersManualfortheseismicdesignofsteelandconcretebuildingstoEurocode8

109

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


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


113

10.7

Concretebuildings


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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


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


117

10.8

Concretebuildings


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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