Shape optimization of braced frames for tall timber buildings: Influence of semi-rigid connections on design and optimization process - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Engineering Structures Année : 2020

Shape optimization of braced frames for tall timber buildings: Influence of semi-rigid connections on design and optimization process

Koliann Mam
  • Fonction : Auteur correspondant
Cyril Douthe
  • Fonction : Auteur
  • PersonId : 776792
  • IdRef : 159668670
François Consigny
  • Fonction : Auteur

Résumé

With the recent development of timber as a viable structural material for high-rise structures, glulam braced frames have been recently introduced in lateral load-resisting systems of timber buildings. Based on a simple shape optimization problem of a braced frame, this paper explores one of the specificities of timber structures: the influence of semi-rigid connections on their overall structural behavior and design. Dowel-type connections are first studied to obtain a simplified relation between joint stiffness and axial load-carrying capacity. Then, the established local behavior law is introduced in the shape optimization process and design of a discrete braced frame subject to lateral drift constraint under wind load. The problem is solved by a COBYLA optimization method, combined with Optimality Criteria (OC) member sizing techniques. Solutions are then evaluated and compared with classical steel/concrete design. The semi-rigid behavior of connections finally leads to a significant increase in the volume of timber but also affects the optimal shape and topology of the X-braced frame compared with classical results.
Fichier principal
Vignette du fichier
1-s2.0-S0141029619332845-am.pdf (2.82 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03490294 , version 1 (10-05-2022)

Identifiants

Citer

Koliann Mam, Cyril Douthe, Robert Le Roy, François Consigny. Shape optimization of braced frames for tall timber buildings: Influence of semi-rigid connections on design and optimization process. Engineering Structures, 2020, 216, pp.110692. ⟨10.1016/j.engstruct.2020.110692⟩. ⟨hal-03490294⟩
27 Consultations
100 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More