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research article

Punching shear capacity of continuous slabs

Einpaul, Jürgen
•
Ospina, Carlos E.
•
Fernández Ruiz, Miguel
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2016
ACI Structural Journal

Provisions for punching shear design of reinforced concrete slabs are usually calibrated on the basis of results from tests on isolated specimens that simulate the slab zone within the points of contraflexure around a column. However, the punching behavior of interior slab-column connections in actual continuous slabs without transverse reinforcement may be influenced by the effects of moment redistribution and compressive membrane action, which can lead to higher punching strengths and lower deformation capacities compared to those in isolated specimens. This paper discusses these behavioral differences on the basis of experiments performed on symmetric edge-restrained slabs and investigates available test data by means of a numerical model. A simplified calculation method (based on the Critical Shear Crack Theory) that accounts for these effects is also proposed. The calculation model shows consistent agreement with the results of the numerical evaluation and is sufficiently simple to be used in design and assessment.

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Type
research article
DOI
10.14359/51688758
Web of Science ID

WOS:000388213900020

Author(s)
Einpaul, Jürgen
Ospina, Carlos E.
Fernández Ruiz, Miguel
Muttoni, Aurelio  
Date Issued

2016

Publisher

ACI Structural Journal

Published in
ACI Structural Journal
Start page

861

End page

872

Subjects

béton armé

•

modèle analytique

•

plancher-dalle

•

poinçonnement

•

théorie de la fissure critique

•

reinforced concrete

•

analytic model

•

flat slab

•

punching

•

critical crack theory

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
IBETON  
Available on Infoscience
July 25, 2016
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/128123
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