Negative flexural performance of steel-UHPC composite deck with a novel grouped stud configuration addressing the shrinkage influence

IF 6.4 1区工程技术 Q1 ENGINEERING, CIVIL

Engineering Structures Pub Date : 2025-10-03 DOI:10.1016/j.engstruct.2025.121474

Sheraz Abbas , Han Xiao , Chen Xu , Wei Wang , Biao Ma

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引用次数: 0

Abstract

The shrinkage effect in steel-Ultra High Performance Concrete (UHPC) composite decks can lead to damage accumulation, potentially compromising the flexural performance and structural integrity of the composite system. A newly developed group stud configuration that is effective in reducing the early shrinkage-induced stress in steel-UHPC composite decks. A further study on the negative flexural performance of steel-UHPC composite deck with group stud configuration was conducted to reveal its mechanical performance and reliability. Two full-scale bridge deck segment specimens, with Conventional Uniform studs (SU) and Novel Grouped studs (SG) configurations, were investigated through static load tests under negative bending to evaluate the negative flexural performance. Additionally, simulations and parametric analysis were carried out to assess the impact of varying group stud spacing on flexural performance. The results indicate that the grouped stud arrangement not only reduces shrinkage-induced stresses but also improves crack control, while maintaining bending stiffness and ultimate load capacity comparable to the conventional unifrom stud arrrangment. Additionally, reinforcement yielding occurred at crack widths beyond 1.0 mm, highlighting the potential of the grouped stud configuration to improve serviceability and long-term durability in steel–UHPC composite decks. Similarly, Finite Element (FE) simulations successfully captured the stress distribution induced by shrinkage and the corresponding load-displacement behaviour. Parametric analysis revealed that shrinkage-induced stresses reduced the load capacity by 10 % in the uniform stud arrangement, whereas this effect was negligible in the grouped stud configuration. This study confirms that a grouped stud configuration mitigates shrinkage-induced stresses while maintaining comparable mechanical performance, providing important implications for the design of steel-UHPC composite bridge decks.

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采用新型组合螺柱结构的钢- uhpc复合桥面负弯曲性能，解决了收缩影响

钢-超高性能混凝土（UHPC）复合桥面的收缩效应会导致损伤累积，潜在地影响复合系统的抗弯性能和结构完整性。一种新型的组钉结构，可有效降低钢- uhpc复合桥面的早期收缩应力。通过对群螺柱结构钢- uhpc复合桥面负弯性能的进一步研究，揭示了其力学性能和可靠性。通过负弯曲静载试验，研究了传统均匀螺柱（SU）和新型组合螺柱（SG）两种全尺寸桥面节段试件的负弯曲性能。此外，还进行了仿真和参数分析，以评估不同组螺柱间距对弯曲性能的影响。结果表明，组合螺柱布置不仅可以降低收缩应力，还可以改善裂缝控制，同时保持与常规单螺柱布置相当的抗弯刚度和极限承载能力。此外，裂缝宽度超过1.0 mm时也会发生钢筋屈服，这凸显了组合柱钉配置在提高钢- uhpc复合桥面的使用性能和长期耐久性方面的潜力。同样，有限元（FE）模拟成功地捕获了收缩引起的应力分布和相应的荷载-位移行为。参数分析显示，收缩应力使均匀螺柱布置的承载能力降低了10 %，而在组合螺柱配置中，这种影响可以忽略不计。该研究证实，组合螺柱配置可以减轻收缩引起的应力，同时保持相当的机械性能，为钢- uhpc复合桥面的设计提供了重要的启示。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.