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  4. Punching of edge columns with and without shear reinforcement: an experimental investigation
 
conference paper

Punching of edge columns with and without shear reinforcement: an experimental investigation

Hernández Fraile, Diego  
•
Setiawan, Andri
•
Borges dos Santos, Júlia
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June 16, 2022
Proceedings for the 6th fib International Congress 2022
6th fib International Congress 2022

Most research efforts in the past related to the punching resistance of reinforced concrete slabs have concentrated on the response of internal slab-column connections, where significant advances in the state-of-the-art have been performed. Other than internal connections, edge slab-column connections are also very common cases in flat slabs, with a strength usually governed by punching shear conditions as well. Their response is more complex than those of internal slab-column connections, due to the potential moment transfer from the slab to the column and to the uneven shear and moment fields. However, scanty experimental evidence is available due to the difficulty of testing such system under realistic conditions. As a consequence, knowledge on the phenomena governing failure is still limited and predictions of the strength are in most cases performed by adapting punching shear models for internal slab-column connections. In this paper, the main results of an experimental programme on edge slab-column connections is presented, comprising specimens both with and without shear reinforcement. A novel test setup was developed to effectively introduce the effect of continuity in the direction perpendicular to the free edge of the slab. Moreover, refined measurements were performed by using Digital Image Correlation on the concrete surfaces and Fibre-Optic Measurements in selected flexural reinforcement bars and shear reinforcement, allowing for direct measurements of displacements and strains in the critical regions. Based on the experimental observations, a discussion is held on the mechanics governing punching failures of edge slab-column connections.

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Type
conference paper
Author(s)
Hernández Fraile, Diego  
Setiawan, Andri
Borges dos Santos, Júlia
Muttoni, Aurelio  
Date Issued

2022-06-16

Publisher

Fédération Internationale du Béton (fib)

Publisher place

Oslo

Published in
Proceedings for the 6th fib International Congress 2022
ISBN of the book

978-2-940643-15-8

Total of pages

10

Volume

1

Issue

1

Start page

1439

End page

1448

Subjects

punching shear

•

edge slab-column connection

•

flat slab

•

experimental programme

•

shear reinforcement

•

Digital Image Correlation (DIC)

•

Fibre-Optic Measurement (FOM)

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
IBETON  
Event nameEvent placeEvent date
6th fib International Congress 2022

Oslo, Norway

June 12-16, 2022

Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/195449
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