Mesoscale finite element analysis for uniaxial compressive failure and size effect of concrete at cryogenic temperature

被引：0
|
作者：
Yu W. [1 ]
Jin L. [1 ]
Zhang R. [1 ,2 ]
Du X. [1 ]
机构：
[1] Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing
[2] Department of Civil Engineering, Tsinghua University, Beijing
来源：
Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica | 2021年 / 51卷 / 03期
关键词：
Compressive strength; Concrete; Cryogenic temperature; Finite element analysis; Mesoscale; Size effect;
D O I：
10.1360/SST-2021-0026
中图分类号：
学科分类号：
摘要：
Considering the characteristics of concrete mesocomponents, a mesoscale finite element analysis method is proposed in this paper. The static uniaxial compressive response of geometrically similar concrete cubes with different structural sizes at room and cryogenic temperatures is simulated. The degradation behavior of nominal strength of concrete under uniaxial compression at cryogenic temperature and the corresponding size effect are discussed.The results showed that as temperature decreases, the uniaxial nominal compressive strength significantly increases, the brittleness of concrete increases, and the size effect becomes more obvious. When the temperature reaches -120℃, the compressive strength and brittleness of concrete are the highest, exhibiting the strongest size effect. As the temperature is decreased further, the compressive strength decreases slightly within a narrow range. The classical Type- 2 size effect law can describe the size effect results obtained using the finite element analysis at different temperatures. © 2021, Science Press. All right reserved.
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页码：305 / 314
页数：9
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