The standard approach for the equivalent static analysis of line-like structures, based on the gust factor, is reviewed, with special reference to the case of systems with intermediate elastic supports, like cable-stayed masts. For this class of structures the first modal shape exhibits an inversion point and the effect of the upper modes cannot be neglected. A new analysis method, based on the definition of a gust function variable along the height is proposed and applied to a case study. The results are compared with those obtained using the patch load method and the direct integration of the equations of motion which accounts for geometric nonlinearity.
A simplified approach to the wind response analysis of cable-stayed masts
MATERAZZI, Annibale Luigi;VENANZI, ILARIA
2007
Abstract
The standard approach for the equivalent static analysis of line-like structures, based on the gust factor, is reviewed, with special reference to the case of systems with intermediate elastic supports, like cable-stayed masts. For this class of structures the first modal shape exhibits an inversion point and the effect of the upper modes cannot be neglected. A new analysis method, based on the definition of a gust function variable along the height is proposed and applied to a case study. The results are compared with those obtained using the patch load method and the direct integration of the equations of motion which accounts for geometric nonlinearity.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
