@Article{sdhm.2026.085312,
AUTHOR = {Zhiyuan Chen, Fusheng Niu, Zheng He, Xinyi Wei, Xin Wang, Weining Lu, Xiuwen Zhao, Zhibin Zhou, Zhishen Wu, Hua Wang},
TITLE = {Mechanical Properties of Concrete Reinforced with Hybrid BFRP Minibars and Micro Fibers: Experimental Study and Evaluation},
JOURNAL = {Structural Durability \& Health Monitoring},
VOLUME = {},
YEAR = {},
NUMBER = {},
PAGES = {{pages}},
URL = {http://www.techscience.com/sdhm/online/detail/28386},
ISSN = {1930-2991},
ABSTRACT = {Corrosion of steel fibers and limited understanding of hybrid reinforcement mechanisms hinder the application of fiber-reinforced concrete in aggressive environments. This study presents a combined experimental and analytical investigation into the mechanical performance of a novel multi-scale hybrid fiber-reinforced concrete incorporating corrosion-resistant basalt fiber-reinforced polymer (BFRP) minibars alongside various micro fibers. A comprehensive experimental program, including compression and splitting tensile tests on multiple hybrid combinations, was conducted to systematically evaluate the effects of fiber type, volume fraction, and elastic modulus. Analytically, a modified hybrid reinforcement index model was developed and correlated with mechanical properties, revealing that a quadratic function provides a more accurate fit than traditional linear models. Furthermore, the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) method was applied for a multi-criteria performance evaluation integrating mechanical and economic indicators. Results demonstrate that compressive and splitting tensile strengths are increased from 51.87 to 68.48 MPa and from 3.18 to 4.73 MPa, by 32.0% and 48.7%, respectively, with the optimum mixture containing 0.75% micro steel fibers and 1.25% BFRP minibars. The reinforcement index was found to have an optimal range of 0.3–0.5 for maximizing performance. The findings highlight the innovation of using a modified reinforcement index coupled with TOPSIS-based multi-objective assessment, offering a reliable framework for the design of durable and high-performance fiber-reinforced concrete for long-life infrastructure applications.},
DOI = {10.32604/sdhm.2026.085312}
}