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충남대학교

충남대학교 건설재료시공학연구실

Building material & construction lab.

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국외전문학술

Yoon, M., Kim, G., Kim, Y., Lee, T., Choe, G., Hwang, E., & Nam, J. (2017). Creep behavior of high-strength concrete subjected to elevated temperatures. Materials, 10(7), 781.
Yoon, M., Kim, G., Kim, Y., Lee, T., Choe, G., Hwang, E., & Nam, J. (2017). Creep behavior of high-strength concrete subjected to elevated temperatures. Materials, 10(7), 781.
작성자 관리자
조회수 171 등록일 2017.07.11
주저자 Minho Yoon
교신저자 042-821-7731
공동저자 Gyuyong Kim, Youngsun Kim, Taegyu Lee, Gyeongcheol Choe, Euichul Hwang, Jeongsoo Nam
학술지명 Materials
Abstract
Strain is generated in concrete subjected to elevated temperatures owing to the influence of factors such as thermal expansion and design load. Such strains resulting from elevated temperatures and load can significantly influence the stability of a structure during and after a fire. In addition, the lower the water-to-binder (W–B) ratio and the smaller the quantity of aggregates in high-strength concrete, the more likely it is for unstable strain to occur. Hence, in this study, the compressive strength, elastic modulus, and creep behavior were evaluated at target temperatures of 100, 200, 300, 500, and 800 C for high-strength concretes with W–B ratios of 30%, 26%, and 23%. The loading
conditions were set as non-loading and 0.33fcu. It was found that as the compressive strength of the concrete increased, the mechanical characteristics deteriorated and transient creep increased. Furthermore, when the point at which creep strain occurred at elevated temperatures after the occurrence of transient creep was considered, greater shrinkage strain occurred as the compressive strength of the concrete increased. At a heating temperature of 800 C, the 80 and 100 MPa test specimens showed creep failure within a shrinkage strain range similar to the strain at the maximum load.


doi: 10.3390/ma10070781