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- 저자 : Leonardo A. B. Silva (검색결과 1 건)
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Leonardo A. B. Silva,Higor S. D. Argôlo,David L. N. F. Amorim 한국강구조학회 2022 International Journal of Steel Structures Vol.22 No.1
The search to reduce engineering costs leads to the development of new materials and design concepts to obtain lighter and slender structures. Consequently, when using structural parts with cross-sections composed by slender plates, the phenomenon of local instability becomes more evident and is usually treated as a form of collapse. Generally, the behaviour of the structure in terms of local buckling requires refi ned solutions. Then, it is usual to employ fi nite element modelling using meshes with several shell or three-dimensional elements, leading to high computational costs. Therefore, this study proposes a numerical model based on Lumped Damage Mechanics (LDM) applied to local buckling in steel rectangular hollow sections subjected to compressive axial force with bending moment. In the LDM, it is assumed that all the nonlinear eff ects of a fi nite element are concentrated in plastic hinges, where it signifi cantly reduces the computational cost of the computational analysis. For the proposed formulation, equations based on experiments of other authors were introduced to analytically calculate the model parameters. To evaluate the accuracy of the proposed model, the numerical results were compared to other experiments. Thus, it was concluded that the numerical results were satisfactory, since the numerical curves showed similar behaviour when compared to the experimental ones.
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