EN1990_2_Gulvanessian

7/31/2019 EN1990_2_Gulvanessian

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Brussels,18-20February2008Disseminationofinformationworkshop

1

BackgroundandAp

plications

EUROCODES

ProfessorHaigGulvanessian

EN19

90:Eurocod

e:BasisofS

tructuralDe

sign

TheK

eyHeadEuroc

ode

AnInnovativeStructuralSafetyCodeOfPractice

EN199

0Sections1

and2

ProfessorHaigGulvanes

sianCBE

C

ivilEngineerin

gandEurocod

esConsultant

V

isitingProfess

or,ImperialCollege,London


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Brussels,18-20February20

08Disseminationofinformationworkshop

2

EUROCODES

BackgroundandApplications

Pro

fessorHaigGulvanessian

EN1990:EUR

OCODE:BASISOFSTRUCTURAL

DESIGN

Contents

Foreword

Section1

:General

Section2

:Requirements

Section3

:Principles

oflimitstates

Section4

:Basicvariables

Section5

:Structural

analysisanddes

ignassistedby

testing

Section6

:Verificatio

nbythepartialfa

ctormethod

Annex

A(n);(N):Applica

tionforbuildings

(1);bridges(2)

Annex

B(I):Managementofstructuralreliabilityfor

constructionworks

Annex

C(I):Basisforp

artialfactordesignand

reliabilityanalysis

Annex

D(I):Designassistedbytesting


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EN1990:EUR

OCODE:BASISO

FSTRUCTURAL

DESIGN

SECTION1-GENE

RAL

1.1Scop

e

1.2Norm

ativeReferen

ces

1.3Assu

mptions

1.4DistinctionbetweenPrinciplesan

d

Applicationrules

1.5Definitions

1.6Symbols


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EN1990:EUR

OCODE:BASISO

FSTRUCTURAL

DESIGN

1.1Scope

(1)EN1990establishesPrinciplesandrequirementsforthes

afety,

serviceabilityanddurab

ilityofstructures

,describesthebasisfor

theirdesignandverifica

tionandgivesgu

idelinesforrelated

aspect

sofstructuralreliability.

(2)EN1990isintendedtobeusedinconjun

ctionwithEN1991to

EN199

9forthestructur

aldesignofbuild

ingsandcivil

engine

eringworks,includinggeotechnicalaspects,struct

uralfire

design

,situationsinvolvingearthquakes,executionand

temporarystructures.

NOTEForthedesignofspeci

alconstructionworks

(e.g.nuclearinstallations,

dams,etc.),otherprovisionsthanthoseinEN1990

toEN1999mightbe

necessa

ry.

(3)EN1990isapplicablefo

rthedesignofstructureswhereo

ther

materialsorotheractionsoutsidethescopeofEN1991to

EN

1999areinvolved.

(4)EN1990isapplicablefo

rthestructurala

ppraisalofexisting

construction,indevelop

ingthedesignofrepairsandalter

ations

orinassessingchangesofuse.

NOTEAdditionaloramended

provisionsmightbenecessarywhereappropriate.


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EN1990:EUR

OCODE:BASISO

FSTRUCTURAL

DESIGN

1.3Assumptions

(1)(1)DesignwhichemploysthePrinciplesandApplication

whichemploysthePrinciplesandApplication

Rules

isdeemedtomeettherequirementsprovided

Rules

isdeemedtomeettherequi

rementsprovided

theas

sumptionsgiv

eninEN1990

toEN1999are

theas

sumptionsgiv

eninEN1990

toEN1999are

satisfied(see(2)).

satisfied(see(2)).

(2)(2)ThegeneralassumptionsofEN1990are:

thech

oiceofthestr

ucturalsystem

andthedesig

nof

thest

ructureismad

ebyappropria

telyqualifiedand

exper

iencedperson

nel;;

execu

tioniscarried

outbyperson

nelhavingthe

appro

priateskilland

experience;;

adequ

atesupervisio

nandqualitycontrolisprov

ided

indes

ignofficesandduringexecu

tionofthework,i.e.

factor

ies,plants,andonsite;


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EN1990:EUR

OCODE:BASISO

FSTRUCTURAL

DESIGN

1.3As

sumptions(cont.)

theco

nstructionma

terialsandpro

ductsareusedas

specifiedinEN1990

orinEN1991

toEN1999or

inthe

releva

ntexecutions

tandards,orreferencematerialor

produ

ctspecificatio

ns;

thestructurewillbe

adequatelymaintained;

thestructurewillbe

usedinaccordancewiththe

designassumptions

.

NOTET

heremaybec

aseswhenthe

aboveassumptions

needtobesupplemented..


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EN1990:EUR

OCODE:BASISO

FSTRUCTURAL

DESIGN

1.4DistinctionbetweenPrinciplesan

dApplication

Rules

ThePrinciples(letterP)comprise:

gen

eralstatementsanddefinitionsforwh

ichthereisnoalternative,

asw

ellas

requirementsandanalyticalmodelsforwhichnoalternativeis

permittedunlessspecificallystated.

Itispermissibletousealternativedesignrulesdifferentfromth

e

applica

tionrulesgiveninEN1990,provided

thatitisshownthatthe

alternativerulesaccordw

iththerelevantprinciplesandareatleast

equivalentwithregardtoresistance,service

abilityanddurabilitywhich

wouldbeachievedforthe

structureusingEurocodes.

NOTE

Ifanalternativedesig

nruleissubstituted

foranapplication

rule,the

resultingdesigncannotbeclaimedtobewholly

inaccordancewith

EN1990

althoughthedesignwillrem

aininaccordancew

iththePrinciplesofEN1990.

WhenE

N1990isusedin

respectofapropertylistedinanAnne

xZofa

product

standardoranETAG,theuseofanalternativedesignrulem

aynotbe

accepta

bleforCEmarking.


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EN1990:EUR

OCODE:BASISO

FSTRUCTURAL

DESIGN

1.5

Definitions

Forthest

ructuralEurocodesuite,attention

isdrawntothefo

llowing

keydefinitions,whichm

aybedifferentfromcurrentnation

al

practic

es:

Actionmeansaload,

oranimposedde

formation(e.g.

temperatureeffectsors

ettlement)

EffectsofActionsorActioneffectsa

reinternalmome

ntsand

forces,bendingmomen

ts,shearforcesa

nddeformations

caused

byactions

Strengthisamechanicalpropertyofa

material,inunits

of

stress

Resis

tanceisamechanicalpropertyofacross-sectionofa

member,oramembero

rstructure.

Execu

tioncoversalla

ctivitiescarriedo

utforthephysical

completionoftheworkincludingprocure

ment,theinspec

tion

anddo

cumentationther

eof.Thetermcov

ersworkonsite;itmay

alsosignifythefabricationofcomponentsoffsiteandtheir

subsequenterectionon

site.


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EN1990:EUR

OCODE:BASISO

FSTRUCTURAL

DESIGN

1

.6Symbols

SomeImportantTerms

Actions(F)

PermanentActions(G)

VariableActions(Q

)

AccidentalActions

(A)

SeismicAction(Ae)

Values

ofActions

RepresentativeValuesofActions

CharacteristicValu

e(Qk)

CombinationsValu

eofaVariable

Action(

Qk)

Fre

quentValueof

aVariableAction(

Q

k)

Quasi-permanentValueofaVaria

bleAction(

Q

k)


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EN1990:EUR


DESIGN

THEREQUIREMENTS

Fund

amentalrequirements(safety;serviceability;

rob

ustnessandfire)

Relia

bilitydifferentiation

Designworkinglife

Durability

QualityAssurance


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EN1990:EUR


DESIGN

Thefund

amentalrequirem

ents

inEN1990forthereliabilityof

construc

tionworksinclud

e:

Structural

safety:Astructuresh

allbe

designedandexecutedinsuch

away

thatitwill,

duringitsintendedlifewith

appropriat

edegreesofreliability,and

inanecon

omicwaysustainallactions

likelytooc

curduringexecution

and

use.Safetyofpeople,thestruct

ureand

contents.

Serviceability:Astructureshall

be

designedandexecutedinsuch

away

thatitwill,

duringitsintendedlifewith

appropriat

edegreesofreliabilityandin

aneconom

icwayremainfitfortheuse

forwhichitisrequired.Functioning,

comfortan

dappearanceofthe

structure


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EN1990:EUR


DESIGN

Explosion

at

RonanPo

int

1968

Thefund

amentalrequirem

ents:

Robustness

Astru

ctureshallbedesign

edand

execu

tedinsuchawaythatitwill

notbe

damagedbyeventssuchas

Explosions

Impactand

Consequencesofhuman

errors

toan

extentdisproportionatetothe

originalcause

No

te:

Theeven

tstobe

taken

into

accou

ntare

thoseagreed

foran

individ

ua

lpro

jec

tw

iththec

lien

tan

d

there

levan

tau

thori

ty


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EN1990:EUR


DESIGN

(A)is:

15%ofthe

floor

15%ofthe

floor

areaor

areaor

100m2

100m2

whichever

isthe

whichever

isthe

smaller,in

each

smaller,in

each

oftwoadjacent

oftwoadjacent

storeys

storeys

a)is

theplan

b)is

theelevation

Robu

stness-Limitsof

admissibledamage

(B)(B):Notional

:Notional

columnstobe

columnstobe

removed

removed


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EN1990:EUR

OCODE:BASISO

FSTRUCTURAL

DESIGN

RobustnessofBuildingsandCivilEngin

eeringWorks

Limitingpotentialdamagefromidentifie

dhazards

EN19

90givesprinciplesforlimitingpot

entialdamageby

a

nu

mberofmeansin

cluding:

avoiding,eliminatingorreducingthe

hazardstowhichthe

structurecanbes

ubjected;

selectingastructu

ralformwhichhas

lowsensitivitytot

he

hazardsconsidere

d;

selectingastructu

ralformanddesignthatcansurvive

adequatelytheaccidentalremovalof

anindividualmemberora

limitedpartofthe

structure,ortheoc

currenceofacceptable

localiseddamage;

avoidingasfaras

possiblestructuralsystemsthatcancollapse

withoutwarning;

tyingthestructura

lmemberstogethe

r.


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EN1990:EUR


DESIGN

Robustness:Acceptableextentofcollap

seintheeventof

aloca

lfailureinalarge

spanbuilding


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EN1990:EUR


DESIGNBridgeRobustness

VehicleImpact


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Thefundam

ental

requirementsinEN1990f

or

thereliabilityofconstruction

worksinclu

de:

Fire:Inthecaseoffire,thestructural

resistanceshallbeadequateforthe

requiredperiodo

ftime

GOETEBORGDISCOFIRE

GOETEBORGDISCOFIRE

30.10.1998

30.10.1998

Discoapprovedfor150people

Discoapprovedfor150people

with2stairw

ellsservingasescapeways

with2stairw

ellsservingasescapeways

BUTDISC

OWASOVERCROWDED

andFIREOC

CURREDWITHON

ESTAIRWELLUSE

D

FORSTORAGEOFCHAIRS!!

INSUFFIC

IENTESCAPEMEA

NS

&NOSMOKEDETECTION

63YOU

NGPEOPLEDIED


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Pro


EN1990:EUR


DESIGN

THEREQUIREMENTS

Fund


rob

ustnessandfire)

Relia


Designworkinglife

Durability

QualityAssurance


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EN1990:EUR

OCODE:BASISO

FSTRUCTURAL

DESIGN

Reliabilitydiffe

rentiation

Ana

ppropriated

egreeofreliabilityforth

e

ma

jorityofstru

cturesisob

tainedbyde

sign

andexecution

accordingto

Eurocodes

1to

9,withappropriatequalityassurance

me

asures

EN1

990providesguidancef

orobtaining

dif

ferentlevels

ofreliability


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EN1990:EUR

OCODE:BASISO

FSTRUCTURAL

DESIGN

Requ

irement:ReliabilityDiffe

rentiation

Thechoiceofthelevelsofreliabilityforaparticular

structureshouldtake

accountoftherelevantfactors,

including:

thepossiblecause

and/ormodeo

fattainingalim

it

state;

thepossibleconse

quencesoffailureintermsof

riskto

life,injury,potentialeconomicallosses;

pub

licperception

tofailure;

theexpenseandproceduresnecessarytoreduce

the

riskof

failure.


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EN1990:EUROC

ODE:BASISOFST

RUCTURALDESIG

N:

Chapter2:DEFINITIONOFCONSEQUENCESCLASSES

Agriculturalbuildings

wherepeopledonot

normallyenter(e.g

.for

storage),greenhou

ses

Lowconsequen

ceforlossofhumanlife,

andeconomic,

socialorenvironmental

consequencessmallornegligible

CC1

Residentialandoffice

buildings,publicbu

ildings

whereconsequenc

esof

failurearemedium

(e.g.

anofficebuilding)

Mediumconseq

uenceforlossofhuma

n

life,economic,socialorenvironmental

consequencesconsiderable

CC2

Grandstands,bridg

es,

publicbuildingswh

ere

consequencesoffailure

arehigh(e.g.aconcert

hall)

Highconsequenceforlossofhuman

life,oreconomic,socialor

environmentalconsequencesverygreat

CC3

Examplesofbuildingsandcivil

engineeringwo

rks

Description

Consequ

ences

Clas

s


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EN1990:EUR


DESIGN

Valueassociatedwith

=

1,5(SLS,

50yearsreference

Period)

Valueassociatedwith

=

3,8(ULS,50yearsreference

period)

ProbabilitiesOfFailure

Associat

edWithLimitSta

tes


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EN1990:EUROCODE:BASISOFS

TRUCTURALDESIGN

Accepted

risksofdeathduetoexposureto

varioushazards

Publicperceptiond

oesnotacceptfatalities

and

injuriesduetostructuralfailu

re(athome

,at

thew

orkplace,duringrecreationalandother

activitiesetc),for

thedesignworkinglifeofa

struc

turecompar

edtofatalitiesarisingfrom

otherhazardsandevents.


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Pro


a

Ris

k

expresssedas

apro

babilityof

deathfor

typic

al

expo

sed

personper

calendaryear


TRUCTURALDESIGN

Accepted

risksofdeathduetoexposureto

varioushazards

ariskexpressedasprobabilityofdeathfortypicalexposedpersonpercalendaryea

r

12000

600

1000

10000

20000

A

llcauses(U.K.1977)

W

holepopulation

W

omanaged30

M

anaged30

W

omanaged60

M

anaged60

20304090300

Generalaccid

ents

(U.S1969)

Poisoning

Drowning

Firesandburns

Falls

Roadaccidents

45400420

1500

1900

S

ports(U.S)

C

aveexploration(1970-1978)

G

liderflying(1970-1978)

S

cubadiving(1970-1978)

H

anggliding(1977-1979)

P

arachuting

(1978)

0,40,40,52

Naturalhazar

ds(U.S)

Hurricanes(190

1-1972)

Tornadoes(1953-1971)

Lightning(1969

)

Earthquakes(California)

85105110150180210295750

1650

2800

O

ccupations(UK)

C

hemicalandalliedindustries

S

hipbuildingandmarine

e

ngineering

A

griculture

C

onstructionindustries

R

ailways

C

oalmining

Q

uarrying

M

ining(non-coal)

O

ffshoreoilandgas(1967-1976)

D

eepseafishing(1959-1978)

0,144

Buildinghaza

rds

Structuralfailur

e(UK)

Buildingfires(A

ustralia)

Risk

(10-6p.a.)a

Hazard

Risk

(10-6p.a.)a

Hazard


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EN1990:EUR

OCODE:BASISO

FSTRUCTURAL

DESIGN

EN19

90:AnnexB:T

oolsforthem

anagementof

structuralreliability

Dependinguponthe

consequence

soffailure,themain

tools

selectedinEN

1990AnnexB

forthemanagement

ofstructuralreliabilityofconstruc

tionworksare

:

differentiation

by

(reliabilit

yindex)values;at

thisstage,this

isaspecialistactivity;

modificationo

fpartialfactors;

designsuperv

isiondifferent

iation;

inspectionduringexecution


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EN1990:EUR


DESIGN

THEREQUIREMENTS

Fund


rob

ustnessandfire)

Relia


Designworkinglife

Durability

QualityAssurance


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EN1990:EUR


DESIGN

Therequ

irementsfordesign

workinglifestates:

Thedesignworkinglifeis

the

assumed

periodforwhich

a

structure

istobeusedfor

its

intended

purposewithanticipated

maintena

ncebutwithoutm

ajor

repairbeingnecessary.

adesign

workinglifeof

50yearsforbuildings

100yearsforbridges

isrecommendedinEN1990.


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TRUCTURAL

DESIGNINDICATIVEDESIGNWORKINGLIFE

(1)Structuresorpartsofstructuresthatcanbe

dismantledwithaviewof

beingre-u

sedshouldnotbe

consideredastemporary

Monumentalbuildingstructures,high

way

andrailwaybridges,andothercivil

engineeringstructures

100

5

Buildingstructuresandothercommon

structures,notlistedelsewhereinthistable

50

4

Agriculturalandsimilarstructures

15to30

3

Replaceablestruct

uralparts,e.g.gantry

girders,bearings

10to25

2

Temporarystructures(1)

10

1

Examples

design

working

Indicativelife

(years)

Design

working

lifecategory


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Pro


EN1990:EUR

OCODE:BASISO

FSTRUCTURAL

DESIGN

Notionofdesignworking

lifeuseful

for

Th

eselectiono

fdesignact

ions

(e

.g.wind,earthquake)

Co

nsideration

ofmaterialp

roperty

deterioration

(e

.g.fatigue,c

reep)

Lif

ecyclecosting

Ev

olvemainten

ancestrategies


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Pro


EN1990:EUR


DESIGN

THEREQUIREMENTS

Fund


rob

ustnessandfire)

Relia


Designworkinglife

Durability

QualityAssurance


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EN1990:EUR

OCODE:BASISO

FSTRUCTURAL

DESIGN

Durability

Itis

anassumptionindesign

thatthe

du

rabilityofastructureorpartofitinits

environmentis

suchthatit

remainsfitf

or

useduringthe

designwork

inglifegiven

appropriatema

intenance

The

structuresh

ouldbedesignedinsucha

wa

ythatdeteri

orationshou

ldnotimpairthe

du

rabilityandperformance

ofthestruc

ture

havingduereg

ardtothean

ticipatedlevelof

ma

intenance


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EN1990:EUR

OCODE:BASISO

FSTRUCTURAL

DESIGN

Durability

Interrelatedfacto

rstobecon

sidered:

Th

eintendeda

ndfutureus

eofthestructure

Th

erequiredperformancecriteria

Th

eexpectede

nvironmentalinfluences

Th

ecomposition,propertie

sand

performanceofmaterials

Th

echoiceofs

tructuralsystem


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EN1990:EUR

OCODE:BASISO

FSTRUCTURAL

DESIGN

Durability

Interrelatedfac

torstobe

considered

(cont)

Th

eshapeofm

embersand

structural

detailing

Th

equalityofworkmanshipandlevelo

f

control

Th

eparticularprotectivem

easures

Th

emaintenan

ceduringtheintendedlife


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EN1990:EUR


DESIGN

THEREQUIREMENTS

Fund


rob

ustnessandfire)

Relia


Designworkinglife

Durability

QualityAssurance


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Pro


EN1990:EUR

OCODE:BASISO

FSTRUCTURAL

DESIGN-QualityAssurancean

dQualityControl

Inordertoprovideastructurethatcorre

spondstothe

requirementsandtot

heassumptionsmadeinthedesign,

appropriatequalitymanagementmeasuresshouldb

ein

place.

Thesemeasurescomprise:

definit

ionofthereliab

ilityrequiremen

ts,

organisationalmeasu

res,and

contro

lsatthestages

ofdesign,execution,useand

maintenance.

ENISO9001:2000isan

acceptablebasisforquality

managementmeasur

es,whererelev

ant.


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EN1990:EUR


DESIGN

EN1990:Selected

BackgroundDocume

ntsand

furtherreading

1)

ISO2394:

Genera

lprinc

iplesonre

liabilityfors

truc

tures

2)

CEN/TC250PTfo

rENV1991-1:BasisofDe

sign;

Bac

kgroun

dDocum

en

tEC1:Part

1:

Bas

iso

fDes

ign.

ECCS1996.

3)

GulvanessianH,C

algaroJ-A,HolickyM:

Des

igners

Gu

ide

toEN1990:Euroco

de:

Bas

iso

fStructu

ralDes

ign.

ThomasTelford,20

02.

4)

CalgaroJ-A,GulvanessianH:

Managemento

fre

liability

an

dris

kinthe

Euro

co

desys

tem.Conference

Safety,

RiskandReliability,MaltaTrendsinEngineering.

IABSE2001.

5)

Gulvanessian,H.,

Holick,M:Eurocodes:Us

ing

reliabilityana

lys

istocom

bineac

tione

ffec

ts,P

roceedings

oftheInstitutionofCivilEngineers,Structures

and

Buildings,ThomasTelford.August2005.

6)

CEBBulletin203/204/205CEB-FIPModelC

ode90,

CEB1991.

7)

LeonardodaVinciProjectCZ/02/B/F/PP-134007:

Imp

lemen

tationofE

uroco

des:

Han

dboo

k1:Bas

iso

f

Struc

tura

lDes

ign


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EN1990:EUR


DESIGN

Thank

youfor

yourattention

EN1990_2_Gulvanessian

Documents

Transcript of EN1990_2_Gulvanessian