Fracture Mechanics when Studying the Long-Term Strength of Concrete

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The results of experimental and theoretical studies of the process of destruction of concrete by the methods of fracture mechanics are considered. Results of studies of long-term strength, durability and deformability of concrete subjected to a preliminary short-term temperature action up to 300° C and 400° C under load and without load are presented. It is shown that after short-term heating up to 300о С the long-term strength of concrete decreases insignificantly. It is established that heating up to 400° C can be considered the boundary of the structural integrity of concrete. The conditions for using the results of these studies in determining the values of a function that characterizes the change in the long-term strength of a material in the mechanics of heterogeneous structures are formulated. The function of the material destruction measure is introduced to describe the nature of the structural changes in the material at a given constant continuous load, and its change for different levels of a continuous load is considered.

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Edited by:

Dr. Denis Solovev

Pages:

957-962

Citation:

I.L. Shubin et al., "Fracture Mechanics when Studying the Long-Term Strength of Concrete", Materials Science Forum, Vol. 945, pp. 957-962, 2019

Online since:

February 2019

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$41.00

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DOI: https://doi.org/10.5267/j.esm.2017.2.002

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