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Uniaxial and lateral strain behavior of ribbed reinforcement bars inspected with digital image correlation

Uniaxial and lateral strain behavior of ribbed reinforcement bars inspected with digital image correlation


Title: Uniaxial and lateral strain behavior of ribbed reinforcement bars inspected with digital image correlation
Author: Eiriksson, Haukur   orcid.org/0000-0001-9354-2965
Bessason, Bjarni   orcid.org/0000-0002-7963-0763
Unnthorsson, Runar   orcid.org/0000-0002-1960-0263
Date: 2018-05-30
Language: English
Scope: 1992-2003
University/Institute: Háskóli Íslands (HÍ)
University of Iceland (UI)
School: School of Engineering and Natural Sciences (UI)
Verkfræði- og náttúruvísindasvið (HÍ)
Department: Umhverfis- og byggingarverkfræðideild (HÍ)
Faculty of Civil and Environmental Engineering (UI)
Faculty of Industrial Eng., Mechanical Eng. and Computer Science (UI)
Iðnaðarverkfræði-, vélaverkfræði- og tölvunarfræðideild (HÍ)
Series: Structural Concrete;19(6)
ISSN: 1464-4177
1751-7648 (eISSN)
DOI: 10.1002/suco.201800042
Subject: DIC; Experimental observation; Gauge lengths; Lateral strain; Lüder's behavior; Necking; Poisson's ratio; Ribbed reinforcement bars; Stress–strain curves; Byggingarverkfræði; Burðarþol
URI: https://hdl.handle.net/20.500.11815/1372

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Citation:

Eiriksson, HJ, Bessason, B, Unnthorsson, R. Uniaxial and lateral strain behavior of ribbed reinforcement bars inspected with digital image correlation. Structural Concrete. 2018; 19: 1992– 2003. https://doi.org/10.1002/suco.201800042

Abstract:

Knowledge about the plastic behavior of reinforcement steel bars in reinforced concrete (RC) structures is important, especially for seismic design. This paper presents the results of experimental tests where the main aim was to map the plastic deformations of long ribbed reinforcement bars, both in the axial and lateral directions, in order to provide useful information about the behavior of reinforcement bars inside concrete. The study showed that the digital image correlation (DIC) technique is very suitable for this kind of tests. The uniaxial stress–strain curves for side‐by‐side and different gauge lengths (1d, 3d, 5d, 10d) were identical all the way to the max stress, but after that the segment including the neck dominated the strain development. The Poisson's ratio increased rapidly during the yielding phase to 0.44–0.49 and was constant all the way to rupture. The location of the neck could be predicted at the end of the yielding phase.

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