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GBT-based buckling analysis of circular hollow section steel members and structural systems
Published in Alphose Zingoni, Insights and Innovations in Structural Engineering, Mechanics and Computation, 2016
D. Camotim, C. Basaglia, N. Silvestre, L. Palermo
To make the analysis of cold-formed steel CHS structural systems computationally simpler and more accessible to practitioners at the preliminary design stages, while ensuring a reasonable accuracy of the results obtained, one must develop easy-to-use numerical tools based on beam finite element models. A very promising approach is Generalised Beam Theory (GBT), a thin-walled bar theory that incorporates genuine plate/shell concepts, i.e., accounts for cross-section deformation (Schardt 1989). Moreover, the unique GBT modal nature leads to very elegant and illuminating solutions for a wealth of structural problems. In this context, the authors recently developed, numerically implemented and validated GBT-based beam finite element formulations able to analyse the local and global buckling behaviour of cold-formed CHS members (beams and columns—Silvestre 2007) and simple frames (Basaglia et al. 2015).
Effect of bending test setup on the structural stability of I-shape pultruded FRP profiles using variable step size FE analysis
Published in Cogent Engineering, 2023
Conducting a parametric study to investigate the entire design space of the test setup parameters and their effect on the failure modes is not feasible using experimental or analytical approaches due to the limited experimental resources and unavailable closed-form equations, respectively. Consequently, a literature review was undertaken to explore the suitable numerical modelling approach for investigating the bending test setup parameters and their effect on the structural instability of I-shape pultruded FRP profiles. Numerical approaches such as the Finite Strip Method (FSM), Generalised Beam Theory (GBT), and Finite Element Method (FEM) are generally preferred (Kreja, 2011; Trang et al., 2022). FEM represents the suitable approach to simulate the bending test setups of I-shape pultruded FRP beams due to its superior flexibility and accuracy in modelling complex failure modes and versatile boundary and loading conditions (Alhawamdeh, Alajarmeh, Aravinthan, Shelley, Schubel, Mohammed, et al., 2021; Koloor SS et al., 2018; Lamberti et al., 2022).