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Simplified model for estimating the punching resistance of reinforced corete slabs

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Abstract

A method for predicting the punching strength of symmetric slab—column connections in flat slab structures is presented. The rational simplified model used was derived from a more complete one previously proposed by the author. This model leads to a single equation which is all that is required for design, agrees with the observed slab behaviour and correlates well with test results.

Résumé

On présente une méthode de prédiction de la résistance au poinçonnement de raccordements dalle-poteau dans des structures de planchers-dalles. On a utilisé un modèle simplifié rationnel dérivé d'un modèle plus complexe proposé précédemment par l'auteur. Ce modèle aboutit à une seule équation dont on se sert surtout pour le calcul et qui est conforme au comportement expérimental de la dalle et présente une correspondance satisfaisante avec les résultats d'essai.

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Abbreviations

d :

Effective depth of a slab

f c :

Cylinder strength of concrete

f y :

Yield strength of steel

f 0.2 :

0.2% proof stress of prestressing cables

r :

Radius

r 0 :

Radius of a column or loaded area

r p :

Radius of a peripheral load or reaction

x :

Neutral axis depth

z :

Lever arm

A :

Area

E :

Elastic modulus

F :

Force

P :

Column load

n c :

Stress concentration factor

ϱ:

Geometrical ratio of reinforcement

Δϕ:

Small sectorial angle

b:

Bearing

c:

Concrete

e:

Effective

r:

Radial

s:

Steel

t:

Tangential

u:

Ultimate

y:

Yield

p:

Prestress

o:

Ordinary

References

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Authors and Affiliations

  1. Department of Civil Engineering, COPPE, Federal University of Rio de Janeiro, Rio de Jaeiro, Brazil

    Ibrahim A. E. M. Shehata

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  1. Ibrahim A. E. M. Shehata
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Shehata, I.A.E.M. Simplified model for estimating the punching resistance of reinforced corete slabs. Materials and Structures 23, 364–371 (1990). https://doi.org/10.1007/BF02472716

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  • DOI: https://doi.org/10.1007/BF02472716

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