Aerodynamic Damping of Helical Shaped Super Tall Building

Title
Aerodynamic Damping of Helical Shaped Super Tall Building
Author(s)
김원술; 이진학; Yukio Tamura; Kazuo Ohtake; Akihito Yoshida
KIOST Author(s)
Yi, Jin-Hak(이진학)
Alternative Author(s)
김원술; 이진학
Publication Year
2016-08-31
Abstract
Aerodynamic instability and aerodynamic damping ratio of 180° helical model which shows better aerodynamic behavior in both along-wind and crosswind responses on a super tall building was investigated through wind tunnel tests using rocking model, and the aerodynamic damping ratio was evaluated from the wind-induced responses of the model by using Random Decrement Technique (RDT). The aerodynamic damping ratios in along-wind and across-wind direction were verified through comparison with previous research results and that derived by quasi-steady theory. As a result, the aerodynamic instability of the 180 helical model in across-wind direction were not occurred for any conditions with increasing the reduced wind velocity while the square model generally encounters aerodynamic instability due to the vortex shedding (Lock-in Phenomenon).g model, and the aerodynamic damping ratio was evaluated from the wind-induced responses of the model by using Random Decrement Technique (RDT). The aerodynamic damping ratios in along-wind and across-wind direction were verified through comparison with previous research results and that derived by quasi-steady theory. As a result, the aerodynamic instability of the 180 helical model in across-wind direction were not occurred for any conditions with increasing the reduced wind velocity while the square model generally encounters aerodynamic instability due to the vortex shedding (Lock-in Phenomenon).
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/24626
Bibliographic Citation
The 2016 World Congress on Advances in Civil, Environmental and Materials Research (ACEM16), pp.1 - 11, 2016
Publisher
Techno
Type
Conference
Language
English
Publisher
Techno
Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse