par Giménez Azorín, Rodrigo R.G.A.;Santana, Murillo Vinícius Bento;Berke, Peter 
Référence Structures (Oxford), 61, 2352-0124, page (106063)
Publication Publié, 2024-02-28
Référence Structures (Oxford), 61, 2352-0124, page (106063)
Publication Publié, 2024-02-28
Article révisé par les pairs
| Résumé : | Deployable scissor structures can be classified as non-bistable and bistable (exhibiting snap-through) based on their transformation behavior. The question whether the advantage of bistable scissor structures of instantaneous serviceability upon deployment outweighs the disadvantages of their design and structural complexity is researched in this contribution through the application of design optimization to a lightweight emergency footbridge for non-bistable and bistable approaches. The originalities of the present work include the setup of a computational methodology coupling finite element simulations and structural optimization and a critical quantitative comparison of the two design strategies performed by defining and employing different performance indicators for varying structural parameters. The maximum footbridge span respecting weight (transportability) and deflection constraints is also derived for both designs. A total of 24 cases with varying spans and number of constituting modules is critically compared. It is shown that the non-bistable design is generally superior (lower weight and complexity) and dominant parameters influencing the performance indicators are identified. |
