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Title: Typhoon-Induced nonstationary buffeting response of long-span bridges
Authors: Hu, L
Xu, YL 
Huang, W
Liu, H
Keywords: Typhoon wind
Nonstationary buffeting response
Long-span bridge
Issue Date: Dec-2011
Publisher: Department of Civil and Structural Engineering and Department of Mechanical Engineering, The Hong Kong Polytechnic University.
Source: Dynamics for sustainable engineering : proceedings of the 14th Asia-Pacific Vibration Conference, 5-8 December 2011, Hong Kong, v. 1, p. 173-182 How to cite?
Abstract: This paper presents a framework for predicting nonstationary buffeting responses of long-span cable-supported bridges under typhoon loading. First, based on the measurement data of typhoon winds, a non-stationary typhoon wind model is proposed, which includes time-varying mean wind speed, mean wind speed profile, and evolutionary power spectral density (EPSD) function. Typhoon loading is correspondingly described as time-varying mean wind force, nonstationary buffeting forces associated with time-dependent aerodynamic coefficients, and self-excited forces characterized by time-dependent aerodynamic derivatives. The analytical method in the time-frequency domain is then developed to compute time-varying mean responses and EPSD-expressed dynamic responses. The proposed framework is finally applied to compute nonstationary buffeting responses of the Stonecutters cable-stayed bridge in Hong Kong under Typhoon Dujuan. The results display the distinct time-varying properties of mean and standard deviation responses of the bridge under Typhoon Dujuan.
ISBN: 978-962-367-731-8
Rights: Copyright ©2011 Department of Civil and Structural Engineering and Department of Mechanical Engineering, Hong Kong Polytechnic University
Posted with permission of the publisher.
Appears in Collections:Conference Paper

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