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Steel and Composite Structures Volume 54, Number 3, February 10 2025 , pages 263-278 DOI: https://doi.org/10.12989/scs.2025.54.3.263 |
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Study of cyclic behavior of square hollow section steel braces with infill glued-laminated timber |
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Chui-Hsin Chen, Po-Yu Chen, Huang-Ming Chen and Ananda Insan Firdausy
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| Abstract | ||
| This study investigates the cyclic performance of hollow square steel braces that incorporate infilled materials. The proposed infill brace design features gusset plates at both-ends, a prismatic square hollow section, and a solid infilled material to reduce the stress concentration in the mid-span region of the brace member. Numerical simulations based on the parameters of equivalent plastic strain and von Mises stress were conducted to evaluate the behavior of different infill materials, including wood, glued-laminated timber, and H-beam. A series of full-scale brace specimens using glulam infill materials were subjected to experimental cyclic tests to assess failure mode, strength, stiffness, ductility, and energy dissipation. This proposed strategy effectively spreads stress concentration in the mid-span, improves ductility and energy-dissipation capacity, and maintains similar strength and stiffness compared to conventional braces, which are beneficial for retrofitting existing structures at risk of insufficient resistance to low-cycle fatigue. The design parameters proposed should be followed in two steps to achieve the favorable mechanisms of this method in practical applications. | ||
| Key Words | ||
| buckling; ductility; energy dissipation; fracture; glulam; hysteretic behavior; infill material; steel brace | ||
| Address | ||
| Chui-Hsin Chen:Department of Civil Engineering, National Yang Ming Chiao Tung University, 1001, University Rd, Hsinchu 300, Taiwan Po-Yu Chen:Department of Civil Engineering, National Yang Ming Chiao Tung University, 1001, University Rd, Hsinchu 300, Taiwan Huang-Ming Chen:Department of Civil Engineering, National Yang Ming Chiao Tung University, 1001, University Rd, Hsinchu 300, Taiwan Ananda Insan Firdausy: 1)Department of Civil Engineering, National Yang Ming Chiao Tung University, 1001, University Rd, Hsinchu 300, Taiwan 2)Department of Civil Engineering, Brawijaya University, 169, MT. Haryono St, Malang 65145, Indonesia | ||