Scatter of Constitutive Models of the Mechanical Properties of Concrete: Comparison of Major International Codes

An investigation on the scatter of code-type constitutive models that relate compressive strength (fc) with tensile strength (fct) and Young’s modulus (Ec) of standard concrete specimens is presented. The influence of the mix design on the accuracy of the fc vs. fct and fc vs. Ecrelationships is dis...

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Bibliographic Details
Published inJournal of Advanced Concrete Technology Vol. 17; no. 3; pp. 102 - 125
Main Authors Pacheco, João, Brito, Jorge de, Chastre, Carlos, Evangelista, Luís
Format Journal Article
LanguageEnglish
Published Tokyo Japan Concrete Institute 19.03.2019
Japan Science and Technology Agency
Subjects
Compressive strength
Constitutive models
Limit states
Mathematical models
Mechanical properties
Modulus of elasticity
Morphology
Random variables
Reliability analysis
Scattering
Uncertainty
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Summary:An investigation on the scatter of code-type constitutive models that relate compressive strength (fc) with tensile strength (fct) and Young’s modulus (Ec) of standard concrete specimens is presented. The influence of the mix design on the accuracy of the fc vs. fct and fc vs. Ecrelationships is discussed, with emphasis on the lithological type and morphology of the coarse aggregates. The uncertainty of the constitutive models is analysed in probabilistic terms and random variables that model the uncertainty of the fc vs. fct and fc vs. Ec relationships are proposed for reliability analyses of serviceability limit states. The suitability of the models proposed is assessed through preliminary conservative estimates of their design values.
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ISSN:1346-8014
1347-3913
DOI:10.3151/jact.17.102