东南大学学报（自然科学版）2025，Vol.55Issue(5)：1426-1434,9.DOI:10.3969/j.issn.1001-0505.2025.05.024
ECC面层加固URM墙抗剪性能研究
Study on shear performance of URM wall reinforced with ECC surface layer
摘要
Abstract
In order to study the shear behaviors of unreinforced masonry(URM)walls strengthened with engi-neered cementitious composites(ECC),compression-shear tests were conducted on 16 ECC-strengthened specimens and 2 unreinforced control specimens considering factors including single/double-side reinforcement and overlay thickness.The influence of ECC on the shear performance of URM walls was comparably ana-lyzed.Considering the global stiffness coefficient and the strength utilization coefficient of the surface layer,a shear capacity calculation formula based on the global assumption was developed using the superposition method.The results demonstrate that ECC surface reinforcement transforms the brittle failure of URM walls into ductile failure.The specimens with a thick of 25 mm exhibit the highest enhancement ratios for the cracking shear strength,ultimate shear strength,and cracking shear modulus,increasing by 115.78%,85.36%,and 90.34%for single-side reinforcement,and 153.73%,110.56%,and 136.23%for double-side reinforcement compared with those of unreinforced specimens,respectively.The average ratios of the calculated values to the experimental values for single-and double-sided reinforcement obtained using the proposed formula are 92.9%and 91.4%,respectively,and the standard deviations are 2.82%and 4.80%,respectively.This calculation method provides valuable reference for practical applications of ECC strengthening technology in URM walls.关键词
工程水泥基复合材料/无筋砌体墙/抗剪性能/压剪试验/抗剪承载力计算公式Key words
engineered cementitious composites(ECC)/unreinforced masonry(URM)wall/shear perfor-mance/compression-shear test/shear capacity calculation formula分类
建筑与水利引用本文复制引用
陈伟宏,罗劲,韩春晖,吴应雄..ECC面层加固URM墙抗剪性能研究[J].东南大学学报（自然科学版）,2025,55(5):1426-1434,9.基金项目
福建省自然科学基金资助项目(2022J01557) （2022J01557）
国家自然科学基金资助项目(52378495) （52378495）
福建省2024年度交通运输科技资助项目(YB202411). （YB202411）
