Tensile behavior and its temporal evolution of acoustic emission damage of UHPC under alternating cryogenic and elevated environments

被引：0
作者：
He, Bei [1 ,2 ]
Zhang, Hongen [1 ,2 ]
Zhao, Mingrui [3 ]
Zhu, Xinping [1 ,2 ]
Ren, Qiang [1 ,2 ]
Zhang, Yi [1 ,2 ]
Jiang, Zhengwu [1 ,2 ]
机构：
[1] School of Materials Science and Engineering, Tongji University, Shanghai
[2] Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai
[3] Cnooc Gas and Power Group, Beijing
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2024年 / 45卷 / 09期
关键词：
acoustic emission parameter; cryogenic temperature; elevated temperature; temporal evolution; tensile behavior; ultra-high performance concrete;
D O I：
10.14006/j.jzjgxb.2023.0529
中图分类号：
学科分类号：
摘要：
To reveal the performance evolution and degradation mechanism of ultra-high performance concrete (UHPC) under extreme temperature environments, the tensile behavior of UHPC in the range of - 170 ℃ to 200 ℃ was investigated, and the temperature-variation damage and crack evolution of UHPC were in-situ monitored by acoustic emission (AE) technology. The results indicate that under the alternating cryogenic and elevated environments, the tensile failure of UHPC with straight and hooked-end steel fibers exhibits strain-hardening characteristics. In first temperature-variation cycle, the mechanical properties of UHPC show fluctuations, with the highest at cryogenic temperatures and the lowest at elevated temperatures. After multiple cycling, the mechanical properties of UHPC decrease accordingly. The AE signal generated by UHPC damage contains abundant failure characteristic parameters, and its AE peak frequency morphology differentiates at cryogenic and elevated temperatures, while that exhibits a centralized single peak distribution in other environments. Except for cryogenic temperatures, UHPC cracking in other environments is mainly tensile cracks, and the number of tensile cracks in the hooked-end fiber group is lower than that in the straight fiber group. As the cycling increasing, the number of tensile cracks in UHPC decreases. © 2024 Science Press. All rights reserved.
引用
收藏
页码：1 / 11
页数：10
相关论文
共 14 条
  • [1] JIANG Z, HE B, ZHU X, Et al., State-of-the-art review on properties evolution and deterioration mechanism of concrete at cryogenic temperature, Construction and Building Materials, 257, (2020)
  • [2] POLKA M, PIEC R, OLCEN D., Analysis of fire and explosion properties of LNG, Safety & Fire Technology, 58, 2, pp. 58-73, (2021)
  • [3] LI Y, CHEN Y, SHAO W, Et al., Service life prediction and lateral bearing capacity analysis of piles considering coupled corrosion-temperature deterioration processes [ J ], Journal of Marine Science and Engineering, 9, 6, (2021)
  • [4] AFROUGHSABET V, BIOLZI L, OZBAKKALOGLU T., High-performance fiber-reinforced concrete: a review, Journal of Materials Science, 51, pp. 6517-6551, (2016)
  • [5] HUO Y, SUN H, LU D, Et al., Mechanical properties of concrete at low and ultra-low temperatures-a review, Journal of Infrastructure Preservation and Resilience, 3, 1, pp. 1-15, (2022)
  • [6] DAHMANI L, KHENANE A, KACI S., Behavior of the reinforced concrete at cryogenic temperatures, Cryogenics, 47, 9, pp. 517-525, (2007)
  • [7] ROSTASY F, PUSCH U., Strength and deformation of lightweight concrete of variable moisture content at very low temperatures, International Journal of Cement Composites and Lightweight Concrete, 9, 1, pp. 3-17, (1987)
  • [8] KIM M-J, YOO D-Y, KIM S, Et al., Effects of fiber geometry and cryogenic condition on mechanical properties of ultra-high-performance fiber-reinforced concrete, Cement and Concrete Research, 107, pp. 30-40, (2018)
  • [9] BROWNE R, BAMFORTH P., The use of concrete for cryogenic storage: a summary of research, past, and present [ C ], First International Conference on Cryogenic Concrete, pp. 135-166, (1981)
  • [10] MIURA T., The properties of concrete at very low temperatures, Materials and Structures, 22, 4, pp. 243-254, (1989)
12