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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Sørensen, Jesper Harrild
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
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Publications (6/6 displayed)
- 2024Full-scale tests of two-storey precast reinforced concrete shear walls:Investigation of strength and deformation capacitycitations
- 2024Full-scale tests of two-storey precast reinforced concrete shear wallscitations
- 2023MINIMASS: a new approach for low-carbon, low-cost 3D printed concrete beams
- 2022Compression Strength of Reinforced Concrete Cubes Pre-Cracked by Uniaxial and Biaxial Tension
- 2021Keyed shear connections with looped U‐bars subjected to normal and shear forces Part I: Experimental investigationcitations
- 2021Keyed shear connections with looped U‐bars subjected to normal and shear forces Part Icitations
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document
Compression Strength of Reinforced Concrete Cubes Pre-Cracked by Uniaxial and Biaxial Tension
Abstract
This paper concerns an experimental investigation of the strength reduction in reinforced concrete with multiple orthogonal crack planes. For this purpose, a special cross-shaped test specimen design, containing a cubical core with an orthogonal reinforcement mesh, has been developed. The design allowed for introduction of cracks by uniaxial tension in direction 1 with subsequent introduction of cracks in direction 2 prior to compression test of the core (in direction 3). Compression strength of cubes at six different levels of deterioration due to cracking, with tensile strains ranging from approximately ε<sub>1</sub> = ε<sub>2</sub> = 0.25 % - 5.00 %, was tested and compared to the strength of cubes with cracks induced only in direction 1. For reference, reinforced as well as unreinforced cubes without premade cracks were also tested. The test results showed that pre-cracked cubes experienced a strength reduction compared to those without pre-cracking. The strength reduction was of greater magnitude for specimens that were biaxially pre-cracked compared to the uniaxially pre-cracked specimens when ε1 had similar value in both cases, e.g. (<sub>𝜀1</sub>; <sub>𝜀2</sub>) ≈ (2%; 0) and (<sub>𝜀1</sub>; <sub>𝜀2</sub>) ≈ (2%;2%), respectively. The obtained results cannot directly be interpreted as a strength reduction solely due to cracking because in the tests, the reinforcement provided a confinement effect. Nevertheless, the experimental results indicate that the compression strength reduction due to cracking can be expressed by an expression, which has the same format as those used for plane stress conditions, provided that the expression depends on the sum of the applied transverse strains (<sub>ε1</sub> +<sub>ε2</sub>).