Vol. 22, No. 3, pp. 298-306 (2026)
THEORETICAL FEASIBILITY STUDY OF THE NEW STEEL GRATING WEB COMPOSITE BEAM
Jun Hu *, Yong-Yong Liang, Xin-Qi Zhang, Fu-Ming Yang and Liang-Jian Lai
School of Civil Engineering, Chongqing Jiaotong University, Chongqing, 400074, China
*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 1 April 2025; Revised: 4 September 2025; Accepted: 20 September 2025
DOI:10.18057/IJASC.2026.22.3.5
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ABSTRACT
To reduce the self-weight and the steel consumption of the traditional steel-concrete composite beam, a new steel grating web composite (SGWC) beam is proposed by introducing a steel grating instead of the solid steel beam web. The uniaxial behavior, mechanical performance, load-displacement curve, and failure mechanism of the SGWC beam were studied, and the influence of steel grating size on their bearing capacity was thoroughly investigated. The results indicate that a 21.5% weight reduction in the SGWC beam versus traditional steel beams, and the strength, stiffness, and stability meet the requirements of the Chinese specification. In the elastoplastic analysis, the failure process of the SGWC beam can be divided into the elastic stage, the elastoplastic stage, and the plastic stage. The SGWC beam's load-bearing capacity reduces as grating spacing grows, but improves with greater grating thickness and width.
KEYWORDS
Composite beam, Steel grating web, Feasibility study, Load-displacement curve, Failure mechanism
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