Research on dynamic splitting-tensile properties of concretes with different strength at high temperature

被引：0
|
作者：
Meng L. [1 ]
Huang R.-Y. [1 ]
Jiang D. [2 ]
Xiao K.-T. [3 ]
Li P. [4 ]
机构：
[1] National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing
[2] Beijing Institute of Space Long March Vehicle, Beijing
[3] Research Institute of Chemical Defense, Beijing
[4] School of Management Science and Engineering, Anhui University of Technology, Maanshan
来源：
Gongcheng Lixue/Engineering Mechanics | 2021年 / 38卷 / 03期
关键词：
Concrete; Dynamic splitting-tensile; High-temperature; SHPB; Stress rate;
D O I：
10.6052/j.issn.1000-4750.2020.05.0310
中图分类号：
学科分类号：
摘要：
The large-diameter split Hopkinson pressure bar (SHPB) device and heating device were used to perform dynamic splitting-tensile experiments on three concrete materials with different strengths (C20, C45 and C70) at different temperatures (20 ℃, 200 ℃ and 400 ℃). The dynamic splitting strengths and corresponding failure patterns of concrete materials under the coupling effect of temperature and stress rate are obtained. The results show that the dynamic splitting strength of concrete material increases with the stress rate, but when the stress rates are similar, the dynamic splitting strength decreases significantly as the temperature increases. On this basis, the equations describing the relationship between the dynamic splitting strength and the stress rate of concrete materials at different temperatures are given, and the related material parameters are determined. Comparing the dynamic splitting strength of concrete materials under the coupling effect of stress rate and temperature, it is found that the temperature sensitivity of dynamic splitting strength decreases as the stress rate increases, and gradually decreases with the concrete material strength, but the stress rate sensitivity of dynamic splitting strength increases with the temperature. Copyright ©2021 Engineering Mechanics. All rights reserved.
引用
收藏
页码：202 / 213
页数：11
相关论文
共 25 条
  • [1] Wang Y Y, Li F Q, Xu L F, Et al., Effect of elevated temperatures and cooling methods on strength of concrete made with coarse and fine recycled concrete aggregates, Construction and Building Materials, 210, 20, pp. 540-547, (2019)
  • [2] Luo Daming, Niu Ditao, Su Li, Research progress on durability of stressed concrete under environmental actions, Engineering Mechanics, 36, 1, pp. 1-14, (2019)
  • [3] Zhao Jiankui, Fang Qin, Chen Li, Et al., Numerical analysis of fire resistance of RC beams subjected to explosion and fire load, Journal of Tianjin University (Science and Technology), 10, 48, pp. 873-880, (2015)
  • [4] Peng G F, Bian S H, Guo Z Q, Et al., Effect of thermal shock due to rapid cooling on residual mechanical properties of fiber concrete exposed to high temperatures, Construction and Building Materials, 22, 5, pp. 948-955, (2008)
  • [5] Ma Q, Guo R, Zhao Z, Et al., Mechanical properties of concrete at high temperature-A view, Construction and Building Materials, 93, pp. 371-383, (2015)
  • [6] Jin Liu, Hao Huimin, Zhang Renbo, Et al., Meso-scale simulations of dynamic compressive behavior of concrete at elevated temperature, Engineering Mechanics, 36, 6, pp. 70-78, (2019)
  • [7] Jin Liu, Yang Wangxian, Yu Wenxuan, Et al., Dynamic compressive failure and size effect in lightweight aggregate concrete based on meso-scale simulation, Engineering Mechanics, 37, 3, pp. 56-65, (2020)
  • [8] Qin Chuan, Zhang Chuhan, Study of dynamic behavior of concrete under splitting tensile tests based on mesomechanics, Rock and Soil Mechanics, 31, 12, pp. 3771-3777, (2010)
  • [9] He Donger, Zhang Zihua, Xiao Yunyi, Et al., Experimental investigation on the interfacial debonding between CFRP and post-fire concrete under rapid loading, Engineering Mechanics, 36, pp. 285-292, (2019)
  • [10] Jin Xin, Du Hongxiu, Yan Ruizhen, Experimental study on splitting tensile strength of HPC after elevated temperature, Journal of Taiyuan University of Technology, 44, 5, pp. 637-640, (2013)
123