AUTHOR=Qin Changjin , Dong Xiaogang , Wu Biao , Cai Lidong , Wang Shaohua , Xia Qing TITLE=Fatigue damage analysis of plain and steel fiber-reinforced concrete material based on a stiffness degradation microplane model JOURNAL=Frontiers in Materials VOLUME=11 YEAR=2024 URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2024.1505295 DOI=10.3389/fmats.2024.1505295 ISSN=2296-8016