Shear behavior of ultra-high-performance concrete (UHPC) beams that replace the stirrups with externally web-bonded steel plates

IF 5.6 1区工程技术 Q1 ENGINEERING, CIVIL

Engineering Structures Pub Date : 2025-03-18 DOI:10.1016/j.engstruct.2025.120106

Lifeng Li , Weimeng Jin , Meng Ye , Jiahao Tang , Miao Hou

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引用次数: 0

Abstract

This study proposed a novel ultra-high-performance concrete (UHPC) beam that replaces the stirrups with externally web-bonded steel plates (UB-WSPs) to enhance construction efficiency and structural performance. Seven specimens, including five UB-WSPs and two UHPC beams with/without stirrups, were designed and tested to investigate the shear behavior of UB-WSPs. The effects of different parameters (including cross-sectional area, spacing, and inclination of steel plates) on the ultimate capacity, ductility, and failure modes were explored. The results indicate that UB-WSPs and UHPC beams with stirrups exhibited a shear capacity improvement ranging from 12.6 % to 46.4 % in comparison to UHPC beams without stirrups. While UBs-WSPs exhibited slightly lower shear capacity than UHPC beams with stirrups, they showed better ductility. Diagonal cracks intersected the WSPs, which functioned similarly to stirrups in providing shear resistance. Specimens with inclined WSPs showed equivalent shear capacity to those with vertical WSPs but exhibited a more gradual descending branch in their load-deflection curves. Additionally, the shear contribution of shear resistance components was analyzed to explore the shear mechanism of UB-WSPs. The shear contribution of WSPs to the beam was nearly double that of the stirrups to the beam. Based on the truss-arch model, a method for calculating the shear strength of UBs-WSPs was proposed and validated against the test results. These findings demonstrated the feasibility and advantages of UBs-WSPs in practical application. The UB-WSPs can improve the ductility of no-stirrup UHPC beams and simplify the construction process compared to UHPC beams with stirrups.

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来源期刊

Engineering Structures 工程技术-工程：土木

CiteScore

10.20

自引率

14.50%

发文量

1385

审稿时长

67 days

期刊介绍： Engineering Structures provides a forum for a broad blend of scientific and technical papers to reflect the evolving needs of the structural engineering and structural mechanics communities. Particularly welcome are contributions dealing with applications of structural engineering and mechanics principles in all areas of technology. The journal aspires to a broad and integrated coverage of the effects of dynamic loadings and of the modelling techniques whereby the structural response to these loadings may be computed. The scope of Engineering Structures encompasses, but is not restricted to, the following areas: infrastructure engineering; earthquake engineering; structure-fluid-soil interaction; wind engineering; fire engineering; blast engineering; structural reliability/stability; life assessment/integrity; structural health monitoring; multi-hazard engineering; structural dynamics; optimization; expert systems; experimental modelling; performance-based design; multiscale analysis; value engineering. Topics of interest include: tall buildings; innovative structures; environmentally responsive structures; bridges; stadiums; commercial and public buildings; transmission towers; television and telecommunication masts; foldable structures; cooling towers; plates and shells; suspension structures; protective structures; smart structures; nuclear reactors; dams; pressure vessels; pipelines; tunnels. Engineering Structures also publishes review articles, short communications and discussions, book reviews, and a diary on international events related to any aspect of structural engineering.