Simulation on Temperature Response and Damage of Concrete under Large Temperature Difference Cycling

被引：0
|
作者：
Guo X. [1 ]
An M. [1 ]
Wang Y. [1 ]
Yu Z. [1 ]
Han S. [1 ]
机构：
[1] School of Civil Engineering, Beijing Jiaotong University, Beijing
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2023年 / 26卷 / 08期
关键词：
concrete; damage; large temperature difference cycling; random aggregate model; temperature response;
D O I：
10.3969/j.issn.1007-9629.2023.08.004
中图分类号：
学科分类号：
摘要：
By combination of numerical simulation and experiment，a three‑dimensional spherical random aggregate model of concrete was established. The finite element software was used to analyse the temperature response and damage accumulation process. The simulation results were verified by the large temperature difference cycling test. The results show that with the increase of temperature difference cycling times，the thermal conductivity of concrete becomes worse and the temperature gradient increases. Large tensile stress is generated at the interface between aggregate and mortar，and the damage starts from the interface. The tensile stress increases in the heating process of each cycle，with the result that the damage gradually accumulate and expand from the interface to the matrix，and at last the damage area is connected. The simulation results of temperature response and static elastic modulus loss rate are in good agreement with the experimental values. © 2023 Tongji University. All rights reserved.
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页码：845 / 852
页数：7
相关论文
共 14 条
  • [1] BAIRAGI N K, DUBAL N S., Effect of thermal cycles on the compressive strength，modulus of rupture and dynamic modulus of concreteJ, Indian Concrete Journal, 70, 8, (1996)
  • [2] ZHAO Liang, Study on the pseudo fatigue effect of concrete when suffering periodic temperature and humidityD, (2018)
  • [3] SHOKRIEH M M, SHAKOURI M，, Et al., Effects of thermal cycles on mechanical properties of an optimized polymer concreteJ, Construction and Building Materials, 25, 8, (2011)
  • [4] WANG Shuhe, SHUI Zhonghe, XUAN Dongxing, Investigation on surface cracking damage of concrete under big temperature differenceJ, Journal of Southeast University（Natural Science）, 36, S2, (2006)
  • [5] HUANG H F，, AN M Z，, WANG Y，, Et al., Effect of environmental thermal fatigue on concrete performance based on mesostructural and microstructural analysesJ, Construction and Building Materials, 207, (2019)
  • [6] ZENG Qi, Experiment and analysis of concrete after thermal cycles D, (2018)
  • [7] ZHENG Z S, WEI X S., Mesoscopic models and numerical simulations of the temperature field and hydration degree in early‑age concreteJ, Construction and Building Materials, 266, (2021)
  • [8] LIANG Minfei, FENG Kun, XIAO Mingqing, Et al., Water permeability of concrete based on materials experiment and mesoscale model, J.Journal of Building Materials, 23, 4, (2020)
  • [9] KHAN M I., Factors affecting the thermal properties of concrete and applicability of its prediction modelsJ, Building and Environment, 37, 6, (2002)
  • [10] CHEN Depeng, QIAN Chunxiang, WANG Hui, Et al., Research on determination and calculation method of specific heat capacity of cement‑based materialsJ, Journal of Building Materials, 10, 2, (2007)
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