Title A Finite Element-Based Methodology for the Thermo-mechanical Analysis of Early Age Behavior in Concrete Structures
Authors Cifuentes, H., MONTERO CHACÓN, FRANCISCO DE PAULA, Galan, J., Cabezas, J., Martinez-De la Concha, A., MONTERO CHACÓN, FRANCISCO DE PAULA
External publication No
Means Ind. J. Concr. Struct. Mater.
Scope Article
Nature Científica
JCR Quartile 3
SJR Quartile 1
JCR Impact 1.82000
Area International
Web https://www.scopus.com/inward/record.uri?eid=2-s2.0-85069980143&doi=10.1186%2fs40069-019-0353-0&partnerID=40&md5=2ce9bfeb7530bd57a4359dd880c6d9d9
Publication date 01/08/2019
ISI 000478067200001
Scopus Id 2-s2.0-85069980143
DOI 10.1186/s40069-019-0353-0
Abstract This paper presents a general procedure based on fracture mechanics models in order to analyze the level of cracking and structural safety in reinforced concrete elements at early ages, depending on the stripping time. Our procedure involves the development of a thermo-mechanical numerical model based on the finite element method that accounts for the change in the mechanical properties of concrete with time. Moreover, fracture mechanisms are analyzed by means of a material damage model, which is characterized via specific experimental results obtained for standard specimens and notched beams under three-point bending testing. The loading conditions are both thermal and mechanical, and are obtained from the hydration process for a given concrete dosage. The presented methodology allows for the determination of the optimal stripping time, whereas it helps assessing the analysis of the cracking and the stress states of the elements under consideration. A practical application, namely the analysis of a retaining wall, is used to validate our methodology, showing its suitability in engineering practice.
Keywords heat of hydration; early age cracking; thermo-mechanical model; fracture mechanics of concrete
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