TY - JOUR
T1 - Behavior of shear connection in web-embedded U-shaped steel-concrete composite beams
T2 - Experimental and numerical study
AU - Yan, Wenxu
AU - Yang, Yuanlong
AU - Lou, Guobiao
AU - Chen, Yohchia Frank
N1 - Publisher Copyright:
© 2025
PY - 2025/6/1
Y1 - 2025/6/1
N2 - 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.
AB - 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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U2 - 10.1016/j.engstruct.2025.120020
DO - 10.1016/j.engstruct.2025.120020
M3 - Article
AN - SCOPUS:86000153835
SN - 0141-0296
VL - 332
JO - Engineering Structures
JF - Engineering Structures
M1 - 120020
ER -