Experimental study of aerodynamic damping of a twisted supertall building SCIE SCOPUS

Cited 7 time in WEB OF SCIENCE Cited 7 time in Scopus
Title
Experimental study of aerodynamic damping of a twisted supertall building
Author(s)
Kim, Wonsul; Yoshida, Akihito; Tamura, Yukio; Yi, Jin-Hak
KIOST Author(s)
Yi, Jin Hak(이진학)
Publication Year
2018-05
Abstract
The aerodynamic damping ratios and aeroelastic instability of a 180 degrees helical supertall building with good aerodynamic behavior in both the along-wind and across-wind responses were investigated using an aeroelastic model test (rocking vibration model test). The aerodynamic damping ratios for the 180 degrees helical and square models were evaluated using the random decrement technique. Furthermore, the effect of the triggering level and number of time segments on the evaluation of the aerodynamic damping ratio was also investigated. It was found that both the mean and fluctuating displacement responses of the 180 degrees helical model in the along- and across-wind directions showed better aerodynamic behaviors than those of the square model. Aeroelastic instability of the 180 degrees helical model was not observed at any of the reduced velocities considered in the study. In the along-wind direction, the aerodynamic damping ratios of the 180 degrees helical model exhibit similar trends to those of the square model. However, in the across-wind direction, the aerodynamic damping ratios of the 180 degrees helical model show significantly different trends than those of the square model. Furthermore, there was no effect of the variation in the wind direction on the aerodynamic damping ratio of the 180 degrees helical model. We found that in the evaluation of the aerodynamic damping ratio, it is possible to adopt the triggering level at the value of the standard deviation or root 2 times of the standard deviation of the displacement responses if the random decrement signature has a high number of triggering points.
ISSN
0167-6105
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/929
DOI
10.1016/j.jweia.2018.03.005
Bibliographic Citation
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS, v.176, pp.1 - 12, 2018
Publisher
ELSEVIER SCIENCE BV
Subject
WIND-INDUCED RESPONSE; TALL BUILDINGS; HIGHRISE BUILDINGS; FORCE; LOADS
Keywords
Aerodynamic damping; Structural damping; Random decrement technique; Wind-induced response; Supertall building; Wind tunnel test
Type
Article
Language
English
Document Type
Article
Publisher
ELSEVIER SCIENCE BV
Related Researcher
Research Interests

Ocean Energy-Tidal Current Energy Converter System,Infrastructure Management-Structural Health Monitoring,Offshore Wind,해양에너지-조류발전시스템,시설물 유지관리-구조건전성 평가,해상풍력

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