Techno Press


Wind and Structures   Volume 7, Number 3, May 2004, pages 203-214
DOI: http://dx.doi.org/10.12989/was.2004.7.3.203
 
Development of wind tunnel test model of mid-rise base-isolated building
Takeshi Ohkuma, Hachinori Yasui and Hisao Marukawa

 
Abstract     [Full Text]
    This paper describes a method for developing a multi-degree-of freedom aero-elasto-plastic model of a base-isolated mid-rise building. The horizontal stiffness of isolators is modeled by several tension springs and the vertical support is performed by air pressure from a compressor. A lead damper and a steel damper are modeled by a U-shaped lead line and an aluminum line. With this model, thernfrequency ratio of torsional vibration to sway vibration, and plastic displacements of isolation materials can be changed easily when needed. The results of isolation material tests and free vibration tests show that this model provides the object performance. The peak displacement factors are about 4.5 regardless of wind speed in wind tunnel tests, but their gust response factor decreases with increment of wind speed.
 
Key Words
     base-isolated building; wind tunnel test model; multi-degree-of-freedom model; elasto-plastic model.
 
Address
Takeshi Ohkuma; Department of Architecture and Building Engineering, Kanagawa University, 3-27-1, Rokkakubashi, Yokohama, Kanagawa 221-8686, JapanrnHachinori Yasui and Hisao Marukawa; Urban Environment Research Center, Izumi Sohken Engineering Co., Ltd., 51, Minami-sode, Sodegaura, Chiba 299-0268, Japan
 

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