Experimental study on interaction between membrane structures and wind environment |
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Authors: | Qingshan Yang Yue Wu Weiliang Zhu |
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Institution: | 1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China 2. School of Civil Engineering, Harbin Institute of Technology, Harbin 150006, China |
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Abstract: | The interaction between membrane structures and their environment can be either static or dynamic. Static interaction refers
to interaction with static air, while dynamic interaction refers to wind and its effects. They can be evaluated by two parameters,
added mass and radiation /aerodynamic damping, which are experimentally investigated in this study. The study includes the
effects of both the static and dynamic interaction on structural dynamic characteristics, and the relationship between the
interaction parameters and the covered area of a membrane structure for the static interaction and the relationship between
the interaction parameters and wind direction and speed for the dynamic interaction. Experimental data show that the dynamic
interaction is strongly correlated with the structural modes, i.e., the interaction of the symmetric modes is much larger
than the anti-symmetric modes; and the influence of the dynamic interaction is significant in wind-induced response analysis
and cannot be ignored. In addition, it is concluded that the structural natural frequency is remarkably decreased by this
interaction, and the frequency band is significantly broadened. |
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Keywords: | membrane structure structure-air/wind interaction added mass aerodynamic damping aero-elastic model |
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