Naslov
Updated Lagrangian formulation for nonlinear stability analysis of thin-walled frames with semi-rigid connections

Autori
Turkalj, Goran ; Brnić, Josip ; Lanc, Domagoj ; Kravanja, Stojan

Izvornik
International Journal of Structural Stability and Dynamics (0219-4554) 12 (2012), 3; 1250013-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
thin-walled frames; connections; nonlinear stability; beam element; updated Lagrangian formulation

Sažetak
This paper presents a one-dimensional finite element formulation for nonlinear stability analysis of framed structures with semi-rigid connections. Applying the updated Lagrangian incremental formulation and the nonlinear displacement field of thin-walled cross-sections, the equilibrium equations of a straight beam element are firstly developed. Force recovering is performed according to the external stiffness approach. Material nonlinearity is introduced for an elastic-perfectly plastic material through the plastic hinge formation at finite element ends. To account for the semi-rigid connection behaviour, a special transformation procedure is developed. The effectiveness of the numerical algorithm discussed is validated through the test problems.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo, Strojarstvo, Temeljne tehničke znanosti

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