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- W4320896056 abstract "This paper aim to study the in-plane flexural behaviors of circular hollow section (CHS) T-joints by quasi-static cyclic loading test and finite element (FE) analysis. Two specimens under cyclic in-plane bending (IPB) were carried out to investigate the effect of the brace-to-chord diameter ratios (a key parameter for the CHS joints and denoted as β) on the seismic behaviors of the T-joints. Moreover, finite element (FE) analysis were performed to study the effect of β, γ (another key parameter for the joints with name of the chord radius-to-thickness ratio) and the chord axial pressure on the in-plane flexural behavior of the T-joints. Test results showed that both two specimens failed in tearing of the chord wall at the heat-affected zone (WHAZ), and both two specimens exhibit good ductility and energy dissipation behavior. Both specimens mainly rely on the plastic development of the chord wall near brace/chord intersection and the crack propagation (after cracking) to dissipate energy input by the earthquake. Test results also found that the current specification conservatively predict the in-plane flexural strength of the T-joints (about 20 %–30 %), especially for the joints with larger β. Test and FE results also show that the increase of β (or the decrease of γ) will effectively improve the flexural strength, energy dissipation capacity and ductility ratio. The results also shows that chord pressure stress will adversely affect the in-plane flexural behavior of the T-joints, especially when the stress is larger than 0.6 times of the chord yield strength. A FE parametric study was performed to investigate the effect of β on the force transmission characteristics of the T-joints under IPB, and the force transmission characteristics in elastic state was further interpreted by a simple semi-circular arch analytical model." @default.
- W4320896056 created "2023-02-16" @default.
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- W4320896056 date "2023-04-01" @default.
- W4320896056 modified "2023-10-03" @default.
- W4320896056 title "Study on seismic behavior of CHS T-joints under quasi-static cyclic in-plane bending" @default.
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- W4320896056 doi "https://doi.org/10.1016/j.istruc.2023.02.048" @default.
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