An anisotropic thermomechanical damage model for concrete at transient elevated temperatures

Article

Baker, Graham and deBorst, Rene. 2005. "An anisotropic thermomechanical damage model for concrete at transient elevated temperatures." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 363 (1836), pp. 2603-2628. https://doi.org/10.1098/rsta.2005.1589
Article Title

An anisotropic thermomechanical damage model for concrete at transient elevated temperatures

ERA Journal ID39720
Article CategoryArticle
AuthorsBaker, Graham (Author) and deBorst, Rene (Author)
Journal TitlePhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Journal Citation363 (1836), pp. 2603-2628
Number of Pages26
Year2005
Place of PublicationLondon
ISSN1364-503X
1471-2962
Digital Object Identifier (DOI)https://doi.org/10.1098/rsta.2005.1589
Web Address (URL)http://www.journals.royalsoc.ac.uk/content/p2521x2x0p721p19/fulltext.pdf
Abstract

The behaviour of concrete at elevated temperatures is important for an assessment of integrity (strength and durability) of structures exposed to a high-temperature
environment, in applications such as fire exposure, smelting plants and nuclear installations. In modelling terms, a coupled thermomechanical analysis represents a
generalization of the computational mechanics of fracture and damage. Here, we develop a fully coupled anisotropic thermomechanical damage model for concrete under high stress and transient temperature, with emphasis on the adherence of the model to the laws of thermodynamics. Specific analytical results are given, deduced from thermodynamics, of a
novel interpretation on specific heat, evolution of entropy and the identification of the complete anisotropic, thermomechanical damage surface. The model is also shown to be stable in a computational sense, and to satisfy the laws of thermodynamics.

Keywordsthermodynamics; anisotropic damage; concrete; elevated temperatures; coupled problems
ANZSRC Field of Research 2020510304. Thermodynamics and statistical physics
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Byline AffiliationsFaculty of Engineering and Surveying
Delft University of Technology, Netherlands
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