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Prediction of concrete shrinkage occurring prior to external loading and effect on short-term constitutive modeling and design

Although shrinkage effect is traditionally taken into account in the assessment of long-term deformation of concrete structures, it may significantly affect cracking resistance and deformations of reinforced concrete members subjected to short-term load. Though generally neglected, the shrinkage effect may be of high significance in constitutive modeling of tension-stiffening, particularly, when it is based on tests of reinforced concrete members. Disregarding the shrinkage effect may result in considerable errors of deflection predictions. This paper statistically investigates the accuracy of several well-known free shrinkage strain prediction techniques: Eurocode 2, ACI 209, CNIIS (Russia), Bažant & Baweja’s (B3), and Gardner & Lockman’s (GL 2000). Accuracy of shrinkage prediction models and the influence of shrinkage assessment errors on constitutive modeling and deformation prediction results are illustrated and discussed. Unlike the previous investigations, the present study considers a shrinking period characteristic to the age of a member at first loading. The manuscript reports recommendations useful for short-term constitutive and deformation analysis of reinforced concrete.

The authors gratefully acknowledge the financial support provided by the Research Council of Lithuania (Project No. MIP-083/2012) and the support provided by the Spanish Government (Ministerio de Educacion y Ciencia, Project No. BIA2010-20234-C03-02). The support provided by the European Social Fund (Project No VP1-3.1-SMM-08-K-01-020) is sincerely acknowledged. Viktor Gribniak also wishes to acknowledge the support by the Research Council of Lithuania for the Postdoctoral fellowship granted within the framework of the EU Structural Funds (Project "Postdoctoral Fellowship Implementation in Lithuania")

© Advances in Structural Engineering, 2013, vol. 16, núm. 6, p. 1061-1080

Elsevier

Author: Gribniak, Viktor
Torres Llinàs, Lluís
Kaklauskas, Gintaris
Daniunas, Alfonsas
Kacianauskas, Rimantas
Jakubovskis, Ronaldas
Date: 2013
Abstract: Although shrinkage effect is traditionally taken into account in the assessment of long-term deformation of concrete structures, it may significantly affect cracking resistance and deformations of reinforced concrete members subjected to short-term load. Though generally neglected, the shrinkage effect may be of high significance in constitutive modeling of tension-stiffening, particularly, when it is based on tests of reinforced concrete members. Disregarding the shrinkage effect may result in considerable errors of deflection predictions. This paper statistically investigates the accuracy of several well-known free shrinkage strain prediction techniques: Eurocode 2, ACI 209, CNIIS (Russia), Bažant & Baweja’s (B3), and Gardner & Lockman’s (GL 2000). Accuracy of shrinkage prediction models and the influence of shrinkage assessment errors on constitutive modeling and deformation prediction results are illustrated and discussed. Unlike the previous investigations, the present study considers a shrinking period characteristic to the age of a member at first loading. The manuscript reports recommendations useful for short-term constitutive and deformation analysis of reinforced concrete.
The authors gratefully acknowledge the financial support provided by the Research Council of Lithuania (Project No. MIP-083/2012) and the support provided by the Spanish Government (Ministerio de Educacion y Ciencia, Project No. BIA2010-20234-C03-02). The support provided by the European Social Fund (Project No VP1-3.1-SMM-08-K-01-020) is sincerely acknowledged. Viktor Gribniak also wishes to acknowledge the support by the Research Council of Lithuania for the Postdoctoral fellowship granted within the framework of the EU Structural Funds (Project "Postdoctoral Fellowship Implementation in Lithuania")
Format: application/pdf
ISSN: 1369-4332
Document access: http://hdl.handle.net/10256/11960
Language: eng
Publisher: Elsevier
Collection: MICINN/PN 2011-2013/BIA2010-20234-C03-02
Reproducció digital del document publicat a: http://dx.doi.org/10.1260/1369-4332.16.6.1061
Articles publicats (D-EMCI)
Is part of: © Advances in Structural Engineering, 2013, vol. 16, núm. 6, p. 1061-1080
Rights: Tots els drets reservats
Subject: Assaigs de materials
Materials -- Testing
Formigó armat -- Proves
Reinforced concrete -- Testing
Resistència de materials
Strength of materials
Esforç i tensió
Strains and stresses
Title: Prediction of concrete shrinkage occurring prior to external loading and effect on short-term constitutive modeling and design
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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