Strengthening and impact performance of reinforced concrete (RC) beams using various high-performance fiber-reinforced cementitious composites (HPFRCCs)

IF 6.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment Pub Date : 2025-04-01 DOI:10.1016/j.dibe.2025.100650

Booki Chun, Seung Won Lee, Doo-Yeol Yoo

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引用次数: 0

Abstract

This study investigates the strengthening effect of various high-performance fiber-reinforced cementitious composites (HPFRCCs) on the impact resistance of reinforced concrete (RC) beams. Four different HPFRCCs—ultra-high-performance concrete (UHPC), high-performance strain-hardening cementitious composite (HPSHCC), engineered cementitious composite (ECC), and ultra-rapid-hardening strain-hardening cementitious composite (URSHCC)—were evaluated alongside a normal-strength concrete (NSC) as a control. The results showed that RC beams strengthened with UHPC and HPSHCC achieved the highest flexural load capacities, approximately 8 % greater than the plain RC beam. While UHPC reduced flexural ductility due to its lower tensile strain capacity, HPSHCC enhanced ductility. Strengthening with HPFRCCs also led to a reduction in maximum deflection under impact, with the S-UHPC beam showing the lowest deflection. Despite impact damage, RC beams retained residual flexural strength similar to undamaged beams but exhibited reduced flexural stiffness and ultimate deflection. However, UHPC and URSHCC experienced decreased load capacity after impact due to deformation beyond their tensile strain limits. These findings highlight the effectiveness of HPFRCCs, particularly HPSHCC, in improving the impact resistance and post-damage performance of RC beams.

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来源期刊

Developments in the Built Environment Multiple-

CiteScore

7.40

自引率

1.20%

发文量

审稿时长

22 days

期刊介绍： Developments in the Built Environment (DIBE) is a recently established peer-reviewed gold open access journal, ensuring that all accepted articles are permanently and freely accessible. Focused on civil engineering and the built environment, DIBE publishes original papers and short communications. Encompassing topics such as construction materials and building sustainability, the journal adopts a holistic approach with the aim of benefiting the community.