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Advances in Materials Science and Engineering
Volume 2014, Article ID 191360, 10 pages
http://dx.doi.org/10.1155/2014/191360
Research Article

Temperature Effect on Mechanical Properties and Damage Identification of Concrete Structure

College of Transportation, Jilin University, Changchun 130025, China

Received 16 July 2014; Accepted 13 November 2014; Published 25 November 2014

Academic Editor: Peter Majewski

Copyright © 2014 Yubo Jiao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Static and dynamic mechanical properties of concrete are affected by temperature effect in practice. Therefore, it is necessary to investigate the corresponding influence law and mechanism. This paper demonstrates the variation of mechanical properties of concrete at temperatures from −20°C to 60°C. Temperature effects on cube compressive strength, splitting tensile strength, prism compressive strength, modulus of elasticity, and frequency are conducted and discussed. The results indicate that static mechanical properties such as compressive strength (cube and prism), splitting tensile strength, and modulus of elasticity have highly linear negative correlation with temperature; this law is also applied to the first order frequency of concrete slab. The coupling effect of temperature and damage on change rate of frequency reveals that temperature effect cannot be ignored in damage identification of structure. Mechanism analysis shows that variation of elastic modulus of concrete caused by temperature is the primary reason for the change of frequency.