|本期目录/Table of Contents|

[1]刘家良,苗吉军,王升旭,等.不同冷却条件下高温混凝土性能变化的试验研究与数值分析[J].建筑科学与工程学报,2025,42(05):125-134.[doi:10.19815/j.jace.2024.01002]
　LIU Jialiang,MIAO Jijun,WANG Shengxu,et al.Experimental study and numerical analysis on performance changes of high-temperature concrete under different cooling conditions[J].Journal of Architecture and Civil Engineering,2025,42(05):125-134.[doi:10.19815/j.jace.2024.01002]
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不同冷却条件下高温混凝土性能变化的试验研究与数值分析(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
42卷
期数:
2025年05期
页码:
125-134
栏目:
建筑材料
出版日期:
2025-09-30

文章信息/Info

Title:
Experimental study and numerical analysis on performance changes of high-temperature concrete under different cooling conditions
文章编号:
1673-2049(2025)05-0125-10
作者:
刘家良1,苗吉军1,王升旭1,刘延春1,刘才玮1,辛鲁超2
(1. 青岛理工大学 土木工程学院,山东 青岛 266520; 2. 临沂城建建设集团有限公司,山东 临沂 276002)
Author(s):
LIU Jialiang1, MIAO Jijun1, WANG Shengxu1, LIU Yanchun1, LIU Caiwei1, XIN Luchao2
(1. School of Civil Engineering, Qingdao University of Technology, Qingdao 266520, Shandong, China; 2. Linyi Urban Construction Group Co., Ltd, Linyi 276002, Shandong, China)
关键词:
混凝土;  冷却方式;  抗压强度;  温度差;  数值分析
Keywords:
concrete;  cooling method;  compressive strength;  temperature difference;  numerical analysis
分类号:
TU528
DOI:
10.19815/j.jace.2024.01002
文献标志码:
A
摘要:
为了研究高温混凝土在冷却过程中的热量传输规律和力学性能变化,设计了40组120块150 mm×150 mm×150 mm标准混凝土立方体试块,以混凝土受火温度、冷却方式、喷水冷却时间为变量,分别对混凝土进行加热试验、冷却试验和抗压强度试验。根据试验结果,提出了相应的温度数值模型,研究不同冷却方式过程中高温混凝土的传热规律。结果表明:高温混凝土水冷却的降温速度明显快于自然冷却,100 ℃可作为混凝土水冷却过程的分界点,当温度下降至100 ℃后,浸水冷却和喷水冷却的降温速率显著放缓; 在喷水冷却前期,喷水引起的“热冲击”会导致混凝土产生巨大的内外温差,造成显著的力学性能损失,随着试验进行,混凝土温差缓慢消失,因此在冷却后期,抗压强度逐渐恢复; 经过迭代优化降温过程中混凝土的边界条件与热工参数,提出的ABAQUS有限元模型计算值与试验值吻合度良好,可为高温混凝土水冷却热量传输提供理论参考。
Abstract:
In order to study the heat transfer law and mechanical performance changes of high-temperature concrete during the cooling process, 40 sets of 120 standard concrete cube specimens(150 mm×150 mm×150 mm)were designed. The concrete was subjected to heating tests, cooling tests, and compressive strength tests with variables such as fire temperature, cooling method, and water spray cooling time. Based on the experimental results, a corresponding temperature numerical model was proposed to study the heat transfer law of high-temperature concrete during different cooling methods. The results show that the cooling rate of high-temperature concrete water cooling is significantly faster than natural cooling. 100 ℃ can be used as the boundary point for the concrete water cooling process. When the temperature drops to 100 ℃, the cooling rate of immersion cooling and spray cooling slows down significantly. In the early stage of water spray cooling, the “thermal shock” caused by water spray will result in a huge temperature difference between the inside and outside of the concrete, causing significant loss of mechanical properties. As the experiment progresses, the temperature difference of concrete slowly disappears. Therefore, in the later stage of cooling, the compressive strength gradually recovers. After iterative optimization of the boundary conditions and thermal parameters of concrete during the cooling process, the calculated values of the proposed ABAQUS finite element model has a good agreement with the experimental values, providing theoretical reference for the heat transfer of high-temperature concrete water cooling.

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备注/Memo

备注/Memo:
收稿日期:2024-01-02 投稿网址:http://jace.chd.edu.cn
基金项目:国家自然科学基金项目(52178487); 山东省自然科学基金项目(ZR2021ME228)
作者简介:刘家良(1991-),男,工学博士研究生,E-mail:18724766182@163.com。
通信作者:苗吉军(1970-),男,工学博士,教授,博士生导师,E-mail:msyu_990421@sina.com。
Author resumes: LIU Jialiang(1991-), male, doctoral student, E-mail: 18724766182@163.com; MIAO Jijun(1970-), male, PhD, professor, E-mail: msyu_990421@sina.com.
更新日期/Last Update: 2025-09-25