A shear–shear torsional beam model for nonlinear aeroelastic analysis of tower buildings

In this paper, an equivalent one-dimensional beam model immersed in a three-dimensional space is proposed to study the aeroelastic behavior of tower buildings: linear and nonlinear dynamics are analyzed through a simple but realistic physical modeling of the structure and of the load. The beam is in...

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Vydané v:Zeitschrift für angewandte Mathematik und Physik Ročník 66; číslo 4; s. 1895 - 1913
Hlavní autori: Piccardo, G., Tubino, F., Luongo, A.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Basel Springer Basel 01.08.2015
Predmet:
Beams (structural)
Dynamical systems
Engineering
Galloping
Homogenizing
Mathematical Methods in Physics
Mathematical models
Nonlinear dynamics
Nonlinearity
Theoretical and Applied Mechanics
Towers
74Hxx
74H10
Equivalent beam model
Perturbation approach
74H60
Homogenization procedure
Aeroelastic instability
74-xx
ISSN:0044-2275, 1420-9039
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Shrnutí:In this paper, an equivalent one-dimensional beam model immersed in a three-dimensional space is proposed to study the aeroelastic behavior of tower buildings: linear and nonlinear dynamics are analyzed through a simple but realistic physical modeling of the structure and of the load. The beam is internally constrained, so that it is capable to experience shear strains and torsion only. The elasto-geometric and inertial characteristics of the beam are identified from a discrete model of three-dimensional frame, via a homogenization process. The model accounts for the torsional effect induced by the rotation of the floors around the tower axis; the macroscopic shear strain is produced by bending of the columns, accompanied by negligible rotation of the floors. Nonlinear aerodynamic forces are evaluated through the quasi-steady theory. The first aim is to investigate the effect of mechanical and aerodynamic coupling on the critical galloping conditions. Furthermore, the role of aerodynamic nonlinearities on the galloping post-critical behavior is analyzed through a perturbation solution which permits to obtain a reduced one-dimensional dynamical system, capable of capturing the essential dynamics of the problem.
Bibliografia:ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0044-2275
1420-9039
DOI:10.1007/s00033-014-0456-z