Typhoon-Induced nonstationary buffeting response of long-span bridges

L. Hu, You Lin Xu, W. Huang, H. Liu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

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.
Original languageEnglish
Title of host publication[Missing Source Name from PIRA]
PublisherDepartment of Civil and Structural Engineering and Department of Mechanical Engineering, The Hong Kong Polytechnic University.
ISBN (Print)9789623677318
Publication statusPublished - Dec 2011

Keywords

  • Typhoon wind
  • Nonstationary buffeting response
  • Long-span bridge

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