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《工程(英文)》 >> 2022年 第16卷 第9期 doi: 10.1016/j.eng.2022.01.011

动态荷载作用下钢纤维混凝土细观模拟方法及应用综述

a School of Civil Engineering, Southeast University, Nanjing 210096, China
b Department of Civil and Airport Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
c Science and Technology on Near-Surface Detection Laboratory, Wuxi 214035 China
d College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China

收稿日期: 2020-11-22 修回日期: 2022-01-20 录用日期: 2022-01-26 发布日期: 2022-03-22

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摘要

近年来钢纤维混凝土(SFRC)因对动态和冲击荷载具有优异力学响应而备受关注。现有的试验结果表明,嵌入混凝土基体中的高强度钢纤维具有很强的桥接效应,可以增强纤维与基体之间的结合力,有助于改善SFRC 开裂后性能和残余强度。为了更好地了解钢纤维在基体中的行为表现,以及进一步掌握SFRC在动态荷载作用下的失效机理,细观模拟方法已被广泛用于模拟SFRC材料和结构件的动态响应。细观模拟方法假设SFRC 由不同的细观组分组成,包括钢纤维、粗骨料、砂浆基体和界面过渡区(ITZ)。本文全面综述了动态荷载下SFRC的最新细观模型和模拟过程,系统对比了不同数值模拟研究中SFRC细观模型的生成方法,包括钢纤维、粗骨料及其之间的ITZ。全面总结了不同细观组分的材料模型及纤维与混凝土基体间的相互作用关系。此外,列举了不同动态荷载(即压缩、拉伸和接触爆炸)作用下SFRC细观模拟应用实例。最后,重点分析了现有SFRC细观模拟方法存在的不足,对于SFRC的未来研究及发展具有重要意义。

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