EN 13084-2:2001

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Freistehende Schornsteine - Teil 2: BetonschornsteineCheminées indépendantes - Partie 2: Cheminées en bétonFree-standing chimneys - Part 2: Concrete chimneys91.100.30Beton in betonski izdelkiConcrete and concrete products91.060.40Dimniki, jaški, kanaliChimneys, shafts, ductsICS:Ta slovenski standard je istoveten z:EN 13084-2:2001SIST EN 13084-2:2004en01-april-2004SIST EN 13084-2:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13084-2December 2001ICS 91.060.40English versionFree-standing chimneys - Part 2: Concrete chimneysCheminées indépendantes - Partie 2: Cheminées en bétonFreistehende Schornsteine - Teil 2: BetonschornsteineThis European Standard was approved by CEN on 29 September 2001.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13084-2:2001 ESIST EN 13084-2:2004

Analysis of stresses due to thermal and other actions.19SIST EN 13084-2:2004

Limitations of crack widths.23SIST EN 13084-2:2004

c
cv
c
fcm 0,67
, in N/mm2(1)SIST EN 13084-2:2004

6 + 1,0
6 + 0,6 = tcc(1d)ctis the wall thickness factor;ttct400,1246,2(1e)fcmis the mean compressive strength of concrete;fcm
=
fck + 8
in Newtons per square millimetres(1f)fckis the characteristic compressive strength (cylinders) of concrete in Newtons per square millimetres; is the density of concrete;for normal-weight concrete: = 2200 kg/m3for light-weight concrete:
is the design value of the density of concrete corresponding to the density class in accordance with Table 3.105of ENV 1992-1-4:1994;is the eccentricity; = MN
tMis the design value of the bending moment in the cross-section concerned in Newton metres;Nis the design value of the axial force in the cross-section concerned in Newtons;tis the wall thickness of the cross-section concerned in metres;SIST EN 13084-2:2004

thermal effects.If effects on the stability are expected, the influences from creep, shrinkage and cracking shall be taken intoaccount.6.2 Ultimate limit state6.2.1 Partial safety factorsThe partial safety factors for actions are:a) permanent actions unfavourable effectG
= 1,35 favourable effectG
= 1,0b) wind actionsW
= 1,5c) thermal effectsF
= 1,5d) seismic actionsE
= 1,0The partial safety factors for materials are:e) concreteC
= 1,5f) steel reinforcementS
= 1,156.2.2 Ultimate limit steel strainThe ultimate limit strain of steel is defined by ENV 1992-1-1.6.2.3 Moments of 2nd order6.2.3.1 GeneralFor the determination of moments of 2nd order the mean values of the material properties may be used. In theconcrete compression zone, the following linear material law has to be used: E = cm(3)whereis the stress;Ecmis the modulus of elasticity of concrete;is the strain.SIST EN 13084-2:2004

+ (0)
(85 - 0,14
)
1 + 2,4
1 - ()()2(4) for windshields without continuous vertical reinforcement with the value of
according to equation (6) notexceeding 0,6:MzMzII() = (1 +
)
()2(5)whereMII (z)is the design value of the 2nd order bending moment at height zMI (0)is the design value of the 1st order bending moment at the chimney baseMI (z)is the design value of the 1st order bending moment at height zzis the height at the considered cross-section above the top level of
the foundationhis the height of chimney above the top level of the foundation =
cm hNEI(6) = 0,5 if the horizontal joints do not open deeper than the centre of gravity = 0,75 if the horizontal joints open deeper than the centre of gravityNis the design value of the
axial force at the chimney baseEcmis the modulus of elasticity of concretelis the 2nd moment of area at the chimney base of the uncracked cross-section ignoring reinforcement83tdIm(6a)SIST EN 13084-2:2004

= MII
0,54
(1 - 2) / (Esoil
R3)(7) for a foundation on end bearing pilesppp IIkxM2(8)whereMIIis the design value of the 2nd order bending moment acting on the foundation referred to underside of thefoundationRis the radius of the circular raft foundationEsoilis the modulus of elasticity of the soilis the Poisson's ratio;
= 0,5p is the factor for pile interference in a grid s / d
6 + 11 = ppp(8a)xpis the distance of a pile to the axis of rotationkpis the spring constant of an end bearing piledpis the pile diameterspis the minimum spacing between the piles6.2.3.4 Superposition of effects from
thermal and other actionsThe superposition of thermal stresses and stresses from other actions is pa
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