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

Publisher's version (útgefin grein) 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 o...

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Bibliographic Details
Published in:Structural Concrete
Main Authors: Eiriksson, Haukur, Bessason, Bjarni, Unnthorsson, Runar
Other Authors: 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), School of Engineering and Natural Sciences (UI), Verkfræði- og náttúruvísindasvið (HÍ), Háskóli Íslands (HÍ), University of Iceland (UI)
Format: Article in Journal/Newspaper
Language:English
Published: Wiley-Blackwell 2018
Subjects:
DIC
Experimental observation
Gauge lengths
Lateral strain
Lüder's behavior
Necking
Poisson's ratio
Ribbed reinforcement bars
Stress–strain curves
Byggingarverkfræði
Burðarþol
Iceland
Online Access:https://hdl.handle.net/20.500.11815/1372
https://doi.org/10.1002/suco.201800042
Description
Summary:Publisher's version (útgefin grein) 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. This work was supported by a doctoral grant from the Eimskip University Fund of the University of Iceland, by the University of Iceland Research Fund, and by the Ludvigs Storr Trust Fund. Peer Reviewed

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