Ultra-high performance rubberised concrete slabs cast in stay-in-place formworks: Enhancing shear strength and vibration characteristics

IF 6.4 1区工程技术 Q1 ENGINEERING, CIVIL Engineering Structures Pub Date : 2025-08-01 Epub Date: 2025-04-26 DOI:10.1016/j.engstruct.2025.120322

Vu To-Anh Phan , Hoyeol Hur , Peter McUtchen , Emad Pournasiri , Tung M. Tran , Thong M. Pham

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Abstract

This study investigated innovative bridge slabs using ultra-high-performance rubberized concrete (UHPRuC) combined with special square hollow stiffeners (SHS) or Y-shaped stiffeners. The newly developed UHPRuC was prepared using crumb rubber, silica sand, hooked-end steel fibers, cement, silica fume, and superplasticizer. Four slabs were prepared: two measuring 1400 mm× 600 mm x 75 mm without glass fiber-reinforced polymer (GFRP) SIP formwork, and another two measuring 1400 mm× 600 mm x 65 mm with GFRP SIP formwork. The results showed that incorporating 20 % crumb rubber into UHPRuC increased the damping ratio by 1.5 times and the maximum strain by 3.5 times compared to reference slab. Furthermore, the Y-shaped stiffener significantly enhanced the ultimate loading capacity and resistance to shear stress, and the UHPRuC slabs cast on GFRP SIP formwork demonstrated a 60–91 % improvement over normal-strength concrete slabs. Slabs without GFRP SIP formwork experienced a flexural-shear failure, while slabs with GFRP SIP formwork exhibited predominantly shear failure. Finally, a comparison between experimental data and theoretical predictions revealed that the punching shear strength of the SHS slab closely matched the experimental results, with a 4 % difference. However, the Y-stiffened slab exhibited an experimental value that was 44 % higher than predicted.

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超高性能橡胶混凝土板浇筑在原地模板：提高抗剪强度和振动特性

本研究研究了使用超高性能橡胶混凝土（UHPRuC）结合特殊方形空心加劲筋（SHS）或y形加劲筋的创新型桥板。以橡胶屑、硅砂、钩端钢纤维、水泥、硅灰和高效减水剂为原料制备了新型UHPRuC。制作了四个板：两个尺寸为1400 mmx 600 mm x 75 mm，不使用玻璃纤维增强聚合物（GFRP） SIP模板，另外两个尺寸为1400 mmx 600 mm x 65 mm，使用GFRP SIP模板。结果表明：与参考板相比，掺加20% %碎橡胶的UHPRuC阻尼比提高1.5倍，最大应变提高3.5倍；此外，y形加强筋显著提高了极限承载能力和抗剪应力能力，在GFRP SIP模板上浇筑的UHPRuC板比普通强度混凝土板提高了60 - 91% %。未使用玻璃钢SIP模板的楼板主要发生弯剪破坏，而使用玻璃钢SIP模板的楼板主要发生剪切破坏。最后，将实验数据与理论预测结果进行对比，结果表明：SHS板的冲切抗剪强度与实验结果吻合较好，相差4 %。然而，y型加筋板的实验值比预测值高出44% %。

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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.