First-Order Nonlinear Pseudo-Beat Vibration Model Identification of High Rise Buildings

Abstract:

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With vibration amplitude increasing, the super high-rise building appears obvious pseudo-beat vibration under the combination of vortex-induced force and nonlinear damping force. Therefore, based on Scanlan nonlinear empirical model the first-order nonlinear pseudo-beat vibration responses of the super high-rise building are deduced with KBM method. And then the aerodynamic parameters and vortex-induced force can be identified with least square method. By using the aeroelastic model wind tunnel test of a certain super high-rise building, the wind-induced displacement vibration responses are gathered. By the least square method, each aerodynamic parameter is identified. It shows by analysis that the pseudo-beat vibration force is mainly offered by linear and nonlinear damping forces but secondary offered by linear stiffness force and periodic excitation force. The pseudo-beat vibration force calculated by KBM approximation has the predominant frequency like that of beat vibration response as well as high-order harmonic wave.

Info:

Periodical:

Advanced Materials Research (Volumes 163-167)

Edited by:

Lijuan Li

Pages:

3925-3934

DOI:

10.4028/www.scientific.net/AMR.163-167.3925

Citation:

D. M. Huang et al., "First-Order Nonlinear Pseudo-Beat Vibration Model Identification of High Rise Buildings", Advanced Materials Research, Vols. 163-167, pp. 3925-3934, 2011

Online since:

December 2010

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Price:

$35.00

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