Capacity of steel CHS T-Joints strengthened with external stiffeners under axial compression
| Autor: | Limeng Ma, Lei Zhu, Yue Wei, Yu Bai, Qiming Song |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Chord (geometry)
Yield (engineering) Materials science business.industry Mechanical Engineering 020101 civil engineering 02 engineering and technology Building and Construction Structural engineering Finite element method Brace 0201 civil engineering Factor (chord) 020303 mechanical engineering & transports 0203 mechanical engineering Axial compression Ultimate tensile strength Composite material business Joint (geology) Civil and Structural Engineering |
| Zdroj: | Thin-Walled Structures. 113:39-46 |
| ISSN: | 0263-8231 |
| Popis: | The capacity of steel circular hollow section (CHS) T-joints reinforced with external stiffeners under axial compression is studied by finite element (FE) modeling and theoretical analysis in this paper. The FE modeling approach is first validated by results from axial compressive experiments on nine T-joints with and without stiffeners. Then 256 T-joint FE models are established and analyzed to investigate the influence of the size of external stiffeners and joint geometry on the improvement of ultimate capacity of the joints under axial compression. The results from parametric analysis show that the increment in ultimate capacity decreased when the diameter ratio between the brace and the chord β increased, whereas it remained almost proportional to the factor of stiffener length to the brace diameter η. In addition, for such T-joints, when the thickness of external stiffener was no less than that of the chord wall, the effect of the factor of stiffener thickness to the chord thickness λ and the diameter to thickness ratio of the chord 2γ on the improvement of ultimate capacity was not obvious. On the basis of the yield line model, a theoretical formula is further derived to predict the ultimate strength enhancement of reinforced T-joints with external stiffeners. |
| Databáze: | OpenAIRE |
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