Experimental study on mechanical performance of frame connected by improved end-plate joint.
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| Title: | Experimental study on mechanical performance of frame connected by improved end-plate joint. |
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| Authors: | Guo, Xiaonong1 (AUTHOR), Duan, Xiong1 (AUTHOR), Luo, Jinhui1 (AUTHOR) ljh@tongji.edu.cn, Fang, Yu2 (AUTHOR) |
| Source: | Advances in Structural Engineering. May2026, Vol. 29 Issue 7, p1364-1380. 17p. |
| Subjects: | Beam-column joints, Bracing (Structural engineering), Finite element method, Mechanical behavior of materials, Steel framing, Stiffness (Mechanics), Mechanical movements |
| Abstract: | An improved end-plate joint has been applied to connect H-beams and H-columns in the weak-axis direction. However, there is still a lack of research on the impact of this joint on the strong-axis mechanical behavior of frames. To address this gap, monotonic loading tests were conducted on two steel frames: one braced and the other unbraced, both connected with improved end-plate joints. The mechanical performance of the frames in the strong-axis direction was analyzed based on test phenomena, load-displacement curves, and deformations of the frame and joint core area. Finite element models were established for braced and unbraced frames to investigate the effects of parameters such as cross-brace presence, brace connecting plate presence, stiffener rib configuration, and beam-column joint type on the strong-axis mechanical performance of the frames. A simplified calculation model and stiffness equation for the frames are proposed. The results show that, compared to steel frames with traditional end-plate joints, the initial stiffness, yield load, and ultimate bearing capacity of those with improved end-plate joints are moderately increased. When compared to welded frames, the yield load and ultimate bearing capacity are comparable, while the initial stiffness decreases by 13%. Installing braces significantly enhances the stiffness and bearing capacity of the frame, shifting the failure mode from end-plate bending failure to net section failure of the tension brace. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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