Serviceability limit state - Eurocodes

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Effective width of concrete flanges G. Hanswille Univ.-Prof. Dr.-Ing. Institute for Steel and Composite Structures University of Wuppertal-Germany L e =0,25 (L 1 + L 2 ) for b eff,2 b b L e =2L 3 for b e,1 o b e,2 eff,2 L e =0,85 L 1 for b eff,1 L e =0,70 L 2 for b eff,1 b 1 b o b 2 L 1 L 2 L 3 L 1 /4 L 1 /2 L 1 /4 L 2 /4 L 2 /2 L 2 /4 b eff,0 b eff,1 b eff,1 b eff,2 end supports: b eff = b 0 + β 1 b e,1 +β 2 b e,2 β i = (0,55+0,025 L e /b i ) ≤ 1,0 b eff,2 midspan regions and internal supports: b eff = b 0 + b e,1 +b e,2 b e,i = L e /8 L e – equivalent length 8
Effects of creep of concrete G. Hanswille Univ.-Prof. Dr.-Ing. Institute for Steel and Composite Structures University of Wuppertal-Germany primary effects Initial sectional forces redistribution of the sectional forces due to creep M c,o -M c,r -z i,c a st M L -N c,o N c,r z i,st M st,o M st,r N st,o -N st,r The effects of shrinkage and creep of concrete and non-uniform changes of temperature result in internal forces in cross sections, and curvatures and longitudinal strains in members; the effects that occur in statically determinate structures, and in statically indeterminate structures when compatibility of the deformations is not considered, shall be classified as primary effects. 9
Page 1 and 2: G. Hanswille Univ.-Prof. Dr.-Ing. I
Page 3 and 4: Serviceability limit states G. Hans
Page 7: Shear lag- effective width G. Hansw
Page 11 and 12: Modular ratios taking into account
Page 13 and 14: Effects of cracking of concrete and
Page 15 and 16: Redistribution of sectional forces
Page 19 and 20: Effects of cracking of concrete - s
Page 21 and 22: Control of cracking G. Hanswille Un
Page 23 and 24: Exposure classes according to EN 19
Page 25 and 26: N s ε Cracking of concrete - intro
Page 27 and 28: N s Determination of initial crack
Page 29 and 30: Crack width for stabilised crack fo
Page 31 and 32: Crack width and crack spacing accor
Page 33 and 34: Simplified solution for the crackin
Page 35 and 36: Control of cracking due to direct l
Page 37 and 38: Direct calculation of crack width w
Page 39 and 40: Stresses in reinforcement for final
Page 43 and 44: Deformations and pre-cambering G. H
Page 45 and 46: More accurate method for the determ
Page 47 and 48: Differential equations in case of i
Page 49 and 50: Mean values of stiffness of headed
Page 51 and 52: Comparison of the exact method with
Page 53 and 54: Deflection in case of incomplete in
Page 55 and 56: Limitation of Stresses G. Hanswille
Page 57 and 58: Local effects of concentrated longi
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Serviceability limit state - longit
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Vibration- General G. Hanswille Uni
Page 63 and 64:
Vibration - Example vertical vibrat
Page 65 and 66:
Vibration - vertical vibrations due
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Vibration -vertical vibrations due
Page 69 and 70:
G. Hanswille Univ.-Prof. Dr.-Ing. I
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Serviceability limit state - Eurocodes

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