Vol. 22, No. 1, pp. 78-95 (2026)
STUDY ON DYNAMIC PERFORMANCE OF STEEL-WOOD COMPOSITE
BEAM-COLUMN JOINTS UNDER IMPACT LOAD
Chang Wu 1, 2, Ying-Ni Fan 1, *, Yue-Han Zhang 1 and Yu-Tong Tian 1
1 School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China
2 Western Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China
*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 18 January 2025; Revised: 14 June 2025; Accepted: 15 June 2025
DOI:10.18057/IJASC.2026.22.1.7
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ABSTRACT
This paper proposes a novel steel-timber hybrid beam-column joint suitable for the “timber above and steel below” low-rise hybrid structural system. Sleeves and L-shaped connectors are set up at the joints. Sleeves are set up to prevent the wood from cracking, while L-shaped connectors prevent the steel column from twisting when connecting the upper wood column to the lower I-beam. In order to investigate the impact resistance, the deformation characteristics, damage mechanism and energy dissipation capacity were investigated through tests and numerical simulations. The effects of key parameters such as impact mass, velocity, position, impactor shape, and beam end constraints on the impact resistance of the joints were also analyzed. The results show that the joint’s performance overall was excellent, in which the L-shaped connector served as the primary deformation zone. The joint’s deformation and displacement under the same impact conditions were reduced significantly by reinforcing the connector’s thickness. Furthermore, the spring support replaced the crossbeam’s restraint function effectively during the tests. The parametric analysis revealed that an increase in the hammer’s velocity at impact leads directly to a significant increase in the impact’s peak force and a prolonged impact platform. In contrast, an increase in the hammer’s mass had a limited effect on the impact’s peak force, and merely extended its decay process. Based upon the experimental results and parametric analysis, the vulnerabilities of the steel-timber hybrid joint in the “timber above and steel below” structural system were identified, and corresponding improvement measures are proposed.
KEYWORDS
Steel-timber hybrid structure, Beam-column node, Impact test, Dynamic properties, Damage mechanism
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