Behavior of shear connection in web-embedded U-shaped steel-concrete composite beams: Experimental and numerical study

IF 6.4 1区工程技术 Q1 ENGINEERING, CIVIL Engineering Structures Pub Date : 2025-03-07 DOI:10.1016/j.engstruct.2025.120020

Wenxu Yan , Yuanlong Yang , Guobiao Lou , Yohchia Frank Chen

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Abstract

This paper presents a study on the longitudinal shear connection of a web-embedded U-shaped steel-concrete composite beam (WUSCCB). A push-out test of nine specimens was conducted, and a longitudinal shear bearing mechanism of WUSCCB flange-web interface was proposed. Different from conventional steel-concrete composite beams, the longitudinal shear force at WUSCCB flange-web interface is contributed by both the local compression between shear connectors and surrounding concrete and the longitudinal shear of concrete flange. A finite element analysis was also conducted, revealing the shear mechanism of embedded shear connectors. Subsequently, a parametric analysis including 39 models was carried out to investigate the effects of concrete strength and connector details on the shear resistance behavior, revealing that the width and thickness of connectors are the crucial factors of shear capacity. Based on the test and parametric analysis results, a shear connection design method is proposed. Finally, a finite element model of WUSCCB was developed to verify the design method by examining the relationship between WUSCCB flexural behavior and shear connection degree.

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嵌入腹板的u形钢-混凝土组合梁剪切连接性能：试验与数值研究

本文对预埋腹板u形钢-混凝土组合梁的纵向剪力连接进行了研究。通过9个试件的推出试验，提出了WUSCCB法兰-腹板界面纵向剪切承载机理。与传统钢-混凝土组合梁不同，WUSCCB翼腹板界面处的纵向剪力由剪力连接件与周围混凝土之间的局部压缩和混凝土翼缘的纵向剪切共同贡献。通过有限元分析，揭示了内嵌式剪力连接件的剪切机理。随后，通过对39个模型的参数化分析，研究了混凝土强度和连接件细节对抗剪性能的影响，发现连接件的宽度和厚度是影响抗剪能力的关键因素。在试验和参数分析结果的基础上，提出了抗剪连接设计方法。最后，建立了WUSCCB的有限元模型，考察了WUSCCB受弯性能与剪切连接度的关系，验证了设计方法。

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.