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Wind and Structures
  Volume 19, Number 6, December 2014 , pages 649-663

Unsteady aerodynamic forces on a vibrating long-span curved roof
Wei Ding, Yasushi Uematsu, Mana Nakamura and Satoshi Tanaka

    The present paper discusses the characteristics of unsteady aerodynamic forces on long-span curved roofs. A forced vibration test is carried out in a wind tunnel to investigate the effects of wind speed, vibration amplitude, reduced frequency of vibration and rise/span ratio of the roof on the unsteady aerodynamic forces. Because the range of parameters tested in the wind tunnel experiment is limited, a CFD simulation is also made for evaluating the characteristics of unsteady aerodynamic forces on the vibrating roof over a wider range of parameters. Special attention is paid to the effect of reduced frequency of vibration. Based on the results of the wind tunnel experiment and CFD simulation, the influence of the unsteady aerodynamic forces on the dynamic response of a full-scale long-span curved roof is investigated on the basis of the spectral analysis.
Key Words
    unsteady aerodynamic force; long-span curved roof; wind tunnel experiment; CFD simulation; dynamic response
Wei Ding:School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, China
Yasushi Uematsu: Department of Architectural and Building Science, Tohoku University, Sendai, Japan
Mana Nakamura: Nikken Steel and Sumitomo Metal Corporation, Tokyo, Japan
Satoshi Tanaka: Nikken Sekkei Ltd., Tokyo, Japan

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