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Title
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High-Temperature Mechanical Properties of Concrete
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Type
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JournalPaper
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Keywords
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constitutive models, strength of concrete, fire, residual compressive and tensile strengths, stress-strain relatioships,elastic modulus, elevated temperature.
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Abstract
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Structural fire safety capacity of concrete is very complicated because concrete materials have considerable variations. In this paper, constitutive models and relationships for concrete subjected to fire are developed, which are intended to provide efficient modeling and to specific fire –performance criteria of the behavoir of concrete structures exposed to fire.thay are developed for unconfind concrete specimens that include residual compressive and tensile strengths, compressive elastic modolus, compressive and tensile stress-strain relationshps at elevated temperatures. In this paper, the proposed relationships at elevated temperatues are compared with experimental results tests and previus existing models. It affords to find several advantages and drawbacks of present stress-strain relationships and using these resuls to establish more accurate and general compressive and tensile stress-strain relationships. Additional experimental test results are needed in tension and the other main parameters at elevated temperatures to establish well-founded models and to improve the proposed relationships. The developed models and relationships are general, rational, and have good agreement with experimental data
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Researchers
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MORTEZA BASTAMI (First Researcher), Farhad Aslani (Second Researcher), Mohammad Esmaeilnia omran (Third Researcher)
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