This paper analyses the static and dynamic buckling behavior of a simplified 2-DOF model of a cable stayed tower with emphasis on the safety of the pre-buckling solutions whose stability must be preserved for a safe design. First, the influence of the inherent symmetries of the model on the buckling loads and the post-buckling paths emerging from the bifurcation point is investigated. Then, a global dynamic analysis is conducted to investigate the degree of safety of the static pre-buckling solution. To understand the behavior of the guyed mast in a dynamic environment, a base excitation is considered and the influence of its direction on the escape sta-bility boundary in the force control space is studied. Finally, the erosion and integrity of the basins of attraction of the stable solutions are investigated. The pa-per shows how the tools of nonlinear dynamics can help in the understanding of the global safety and integrity of the model, thus leading to a safe structural design.
Nonlinear dynamics and instability as important design concerns for a guyed mast / P. B., Goncalves; D., Orlando; Rega, Giuseppe; S., Lenci. - STAMPA. - 32(2013), pp. 223-234. [10.1007/978-007-5742-4_18].
Nonlinear dynamics and instability as important design concerns for a guyed mast
REGA, GIUSEPPE;
2013
Abstract
This paper analyses the static and dynamic buckling behavior of a simplified 2-DOF model of a cable stayed tower with emphasis on the safety of the pre-buckling solutions whose stability must be preserved for a safe design. First, the influence of the inherent symmetries of the model on the buckling loads and the post-buckling paths emerging from the bifurcation point is investigated. Then, a global dynamic analysis is conducted to investigate the degree of safety of the static pre-buckling solution. To understand the behavior of the guyed mast in a dynamic environment, a base excitation is considered and the influence of its direction on the escape sta-bility boundary in the force control space is studied. Finally, the erosion and integrity of the basins of attraction of the stable solutions are investigated. The pa-per shows how the tools of nonlinear dynamics can help in the understanding of the global safety and integrity of the model, thus leading to a safe structural design.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.