Vol. 22, No. 4, pp. 461-470 (2026)
STUDY ON SHEAR BEHAVIOR OF FOUR-CORNER BENT BAR CONNECTORS IN
PREFABRICATED CONCRETE COMPOSITE FLOOR SLAB
Zeng-Mei Qiu, Wen-Zhuang Pei, Guo-Chang Li, Meng-Ge Li * and Xiao Li
School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China
*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 16 June 2026; Revised: 19 July 2026; Accepted: 22 July 2026
DOI:10.18057/IJASC.2026.22.4.9
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ABSTRACT
The four-corner bent bar connectors are used to connect the prefabricated concrete composite floor slab with the H-shaped steel beam, aiming to ensure working performance of the floor system. To investigate shear behavior of the four-corner bent bar connectors, a push-out test was conducted with the diameter of steel bar as a variable parameter. Additionally, a push-out specimen model was established using ABAQUS, and the accuracy of models was verified through comparison with test results. On this basis, the entire force process and key parameters of the shear behavior of the four-corner bent bar connectors were analyzed. The results indicate that the four-corner bent bar connector exhibits high initial stiffness and bearing capacity. Moreover, the characteristic displacements of four-corner bent bar connectors comply with the requirement that the lower slip limit for flexible connectors is 6mm, as stipulated in Eurocode 4. Therefore, the four-corner bent bar connector belongs to flexible connectors, demonstrating good ductility. Among the factors, the diameter of steel bars has the most significant influence on its shear bearing capacity, followed by the compressive strength of cast-in-place concrete, while the compressive strength of prefabricated concrete has the least influence. It is recommended that the diameter of steel bars for the four-corner bent bar connector should be set at 14mm, and the strength of steel bars should be HRB400. Based on the numerical simulation results, a calculation formula for the shear bearing capacity applicable to four-corner bent bar connectors was proposed using the method of multiple linear regression.
KEYWORDS
Prefabricated concrete composite floor slabs, Four-corner bent bar connector, Shear behavior, Push-out test, Bearing capacity
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