Publication

Experimental study of the size effect on punching shear of steel fiber reinforced concrete slabs

Aurelio Muttoni
2025

Abstract

As the behavior and design of steel fiber reinforced concrete slabs subjected to punching still remain an area of concern, the present work aims to provide a further contribution to the knowledge on punching behavior of slabs without transverse reinforcement. The results of an experimental program on nine slab–column connections are presented with emphasis on the influence of size effect and steel fiber content. Experimental results show that fibers can significantly increase both strength and deformation capacity. In conclusion, the evaluation of the new Eurocode 2 (Annex L) against the specimens herein tested is presented and discussed. Thanks to the use of 2D Digital Image Correlation, tiltmeters as well as the analyses of slabs after cutting, several critical considerations were made.

Official source

https://infoscience.epfl.ch/entities/publication/44a9ec80-5c4d-4740-bf3b-de93d0d3b5a0

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Aurelio Muttoni
2025

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/44a9ec80-5c4d-4740-bf3b-de93d0d3b5a0

About this result

Related concepts (25)

Rebar

Rebar (short for reinforcing bar), known when massed as reinforcing steel or reinforcement steel, is a steel bar used as a tension device in reinforced concrete and reinforced masonry structures to strengthen and aid the concrete under tension. Concrete is strong under compression, but has low tensile strength. Rebar significantly increases the tensile strength of the structure. Rebar's surface features a continuous series of ribs, lugs or indentations to promote a better bond with the concrete and reduce the risk of slippage.

Reinforced concrete

Reinforced concrete, also called ferroconcrete, is a composite material in which concrete's relatively low tensile strength and ductility are compensated for by the inclusion of reinforcement having higher tensile strength or ductility. The reinforcement is usually, though not necessarily, steel bars (rebar) and is usually embedded passively in the concrete before the concrete sets. However, post-tensioning is also employed as a technique to reinforce the concrete. In terms of volume used annually, it is one of the most common engineering materials.

Prestressed concrete

Prestressed concrete is a form of concrete used in construction. It is substantially "prestressed" (compressed) during production, in a manner that strengthens it against tensile forces which will exist when in service. This compression is produced by the tensioning of high-strength "tendons" located within or adjacent to the concrete and is done to improve the performance of the concrete in service. Tendons may consist of single wires, multi-wire strands or threaded bars that are most commonly made from high-tensile steels, carbon fiber or aramid fiber.

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Experimental study of the size effect on punching shear of steel fiber reinforced concrete slabs

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