Vol. 21, No. 2, pp. 174-181 (2025)
EXPERIMENTAL STUDY ON SHEAR PERFORMANCE OF TWO-STORY
COMPOSITE COLD-FORMED THIN-WALL STEEL EXTERIOR WALL
Yun-Peng Chu, Hui Xia * and Ya-Xin Xiao
School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010, China
*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 10 September 2024; Revised: 24 December 2024; Accepted: 1 January 2025
DOI:10.18057/IJASC.2025.21.2.8
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ABSTRACT
This study investigates the shear performance of composite cold-formed thin-wall steel walls, particularly in two-story configurations. 9 test groups with varying axial compression and anchor bolt types were examined. Results show that, compared to single-story walls, the two-story walls exhibit lower energy dissipation and ductility, with floor joints being the weak link under cyclic loading. Out-of-plane instability and buckling failure often occur at the floor joint, which is critical to maintaining wall strength. The inter-layer tension bar has little effect on enhancing shear capacity. As axial pressure increases, out-of-plane instability worsens, and simply improving the vertical compressive strength of the floor joint with anchor bolts is insufficient to mitigate this issue. However, double-nut anchor bolts significantly improve the wall’s load-bearing capacity. Therefore, the use of anchor bolts at floor joints is recommended to enhance the shear capacity of multi-story structures.
KEYWORDS
Cold-formed thin-wall steel two-story wall, Cyclic loading, Experimental study, Shear performance, Failure mode
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