冻融循环对橡胶混凝土抗疲劳性能的影响

doi:10.16552/j.cnki.issn1001-1625.2024.1337

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (4): 1448-1457.DOI: 10.16552/j.cnki.issn1001-1625.2024.1337

冻融循环对橡胶混凝土抗疲劳性能的影响

薛刚¹, 姚文龙¹, 邵建文², 朱浩君¹, 许胜¹, 董伟¹

1.内蒙古科技大学土木工程学院,包头 014010;
2.鲁东大学土木工程学院,烟台 264025

收稿日期:2024-11-08 修订日期:2024-12-15 出版日期:2025-04-15 发布日期:2025-04-18
通信作者: 姚文龙,硕士研究生。E-mail:yaowenlong1999@126.com
作者简介:薛刚(1968—),男,博士,教授。主要从事新型混凝土材料与结构方面的研究。E-mail:xuegang-2008@126.com
基金资助:
2023年度自治区直属高校基本科研业务费项目(2023RCTD025);国家自然科学基金项目(51868063);山东省自然科学基金青年基金项目(ZR2024QE185)

Effect of Freeze-Thaw Cycle on Fatigue Resistance of Rubber Concrete

XUE Gang¹, YAO Wenlong¹, SHAO Jianwen², ZHU Haojun¹, XU Sheng¹, DONG Wei¹

1. School of Civil Engineering, University of Inner Mongolia Science and Technology, Baotou 014010, China;
2. School of Civil Engineering, Ludong University, Yantai 264025, China

Received:2024-11-08 Revised:2024-12-15 Published:2025-04-15 Online:2025-04-18

摘要/Abstract

摘要： 为研究冻融循环对橡胶混凝土抗疲劳性能的影响,选取粒径为30目(0.5 mm)的橡胶颗粒等体积替代砂制备橡胶混凝土,将普通混凝土试件和橡胶混凝土试件冻融不同次数后,进行等幅单轴压缩疲劳试验,分析试件的疲劳变形特征,建立考虑失效概率的疲劳寿命方程和疲劳损伤模型。结果表明:未冻融状态下,橡胶混凝土最大应变相较于普通混凝土提高约500 με,随着冻融循环次数增加,延性特征减弱,加入橡胶颗粒可以改善混凝土疲劳破坏的延性。冻融循环作用下橡胶混凝土的疲劳寿命服从对数正态分布,极限疲劳强度比普通混凝土提高约9.8%,临界损伤比普通混凝土降低约37%。在冻融循环作用下,掺入橡胶颗粒大幅度提高了混凝土的抗疲劳性能。

关键词: 橡胶混凝土, 抗疲劳性能, 疲劳寿命, 冻融循环, 疲劳损伤, 疲劳方程

Abstract: In order to study the effect of freeze-thaw cycle on the fatigue resistance of rubber concrete, rubber particles with a particle size of 30 mesh (0.55 mm) were selected to replace sand in equal volume to prepare rubber concrete. After different freeze-thaw cycles of ordinary concrete specimens and rubber concrete specimens, a constant amplitude uniaxial compression fatigue test was carried out to analyze the fatigue deformation characteristics of specimens, and the fatigue life equation and fatigue damage model considering failure probability were established. The results show that the maximum strain of rubber concrete is about 500 με higher than that of ordinary concrete under non-freeze-thaw state. With the increase of freeze-thaw cycles, the ductility characteristics are weakened. Adding rubber particles can improve the ductility of concrete fatigue failure. The fatigue life of rubber concrete under freeze-thaw cycle action obeys lognormal distribution. The ultimate fatigue strength of rubber concrete is about 9.8% higher than that of ordinary concrete, and the critical damage of rubber concrete is about 37% lower than that of ordinary concrete. Under the action of freeze-thaw cycle, the incorporation of rubber particles greatly improves the fatigue resistance of concrete.

Key words: rubber concrete, fatigue resistance, fatigue life, freeze-thaw cycle, fatigue damage, fatigue equation

中图分类号:

TU528

薛刚, 姚文龙, 邵建文, 朱浩君, 许胜, 董伟. 冻融循环对橡胶混凝土抗疲劳性能的影响[J]. 硅酸盐通报, 2025, 44(4): 1448-1457.

XUE Gang, YAO Wenlong, SHAO Jianwen, ZHU Haojun, XU Sheng, DONG Wei. Effect of Freeze-Thaw Cycle on Fatigue Resistance of Rubber Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(4): 1448-1457.

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冻融循环对橡胶混凝土抗疲劳性能的影响

Effect of Freeze-Thaw Cycle on Fatigue Resistance of Rubber Concrete

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