BETON ARME Eurocode 2 - LMDC


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WebModule d’élasticité sécant du béton (déformation instantanée) : 3

PDF Le bØton armØ selon l™Eurocode 2

L’Eurocode 2 définit le cadre général pour le dimensionnement ou la vérification des structures en béton Il ne peut être utilisé sans une culture de la mécanique clas-sique du solide (équilibre des forces des moments etc ) et de la physique des ma-tériaux (fluage fissuration écrouissage etc )

Unit Weight γ

The unit weight of concrete γ is specified in EN1991-1-1 Annex A. For plain unreinforced concrete γ = 24 kN/m3. For concrete with normal percentage of reinforcement or prestressing steel γ = 25 kN/m3. eurocodeapplied.com

Characteristic Compressive Strength Fck

The characteristic compressive strength fck is the first value in the concrete class designation, e.g. 30 MPa for C30/37 concrete. The value corresponds to the characteristic (5% fractile) cylinder strength according to EN 206-1. The strength classes of EN1992-1-1 are based on the characteristic strength classes determined at 28 days. The variation

Characteristic Compressive Cube Strength Fck,Cube

The characteristic compressive cube strength fck,cubeis the second value in the concrete class designation, e.g. 37 MPa for C30/37 concrete. The value corresponds to the characteristic (5% fractile) cube strength according to EN 206-1. eurocodeapplied.com

Mean Compressive Strength FCM

The mean compressive strength fcm is related to the characteristic compressive strength fckas follows: fcm = fck+ 8 MPa The variation of mean compressive strength fcm(t) with time t is specified in EN1992-1-1 §3.1.2(6). eurocodeapplied.com

Design Compressive Strength FCD

The design compressive strength fcd is determined according to EN1992-1-1 §3.1.6(1)P: fcd = αcc ⋅ fck / γC where γC is the partial safety factor for concrete for the examined design state, as specified in EN1992-1-1 §2.4.2.4and the National Annex. The coefficient αcc takes into account the long term effects on the compressive strength and of unfavo

Characteristic Tensile Strength

The tensile strength under concentric axial loading is specified in EN1992-1-1 Table 3.1. The variability of the concrete tensile strength is given by the following formulas: eurocodeapplied.com

Design Tensile Strength Fctd

The design tensile strength fctd is determined according to EN1992-1-1 §3.1.6(2)P: fctd = αct ⋅ fctk,0.05 / γC where γC is the partial safety factor for concrete for the examined design state, as specified in EN1992-1-1 §2.4.2.4and the National Annex. The coefficient αct takes into account long term effects on the tensile strength and of unfavorabl

Modulus of Elasticity ECM

The elastic deformation properties of reinforced concrete depend on its composition and especially on the aggregates. Approximate values for the modulus of elasticity Ecm (secant value between σc = 0 and 0.4fcm) for concretes with quartzite aggregates, are given in EN1992-1-1 Table 3.1according to the following formula: Ecm [MPa] = 22000 ⋅ (fcm / 1

Poisson Ratio Ν

According to EN1992-1-1 §3.1.3(4) the value of Poisson's ratio ν may be taken equal to ν = 0.2 for uncracked concrete and ν= 0 for cracked concrete. eurocodeapplied.com

Coefficient of Thermal Expansion α

According to EN1992-1-1 §3.1.3(5) the value of the linear coefficient of thermal expansion α may be taken equal to α = 10⋅10-6 °K-1, unless more accurate information is available. eurocodeapplied.com

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