A CASE-STUDY OF WIND PRESSURE AND WIND-INDUCED VIBRATION OF A LARGE-SPAN OPEN-TYPE ROOF

This paper reports on the results of wind tunnel tests and response an alyses, both of which were conducted in order to obtain data for the w ind resistant design of a large span roof. This roof is planned to be constructed in Kariya Japan. The study was composed of three parts. Fi rst, a wind tunnel test was carried out to investigate the characteris tics of the wind force acting on the roof. Secondly, the response of t he roof was estimated through the modeling of aerodynamic characterist ics obtained from the wind tunnel test. Finally, a wind tunnel test, u sing an elastic model of the roof, was conducted and the test results were compared with the results of the response analysis. This paper on ly shows the results of the wind direction where the vibration respons e is found to be very large. In this case, small values of 0.1 approxi mately 0.3 are shown for the mean wind pressure coefficient. However, the fluctuating wind pressure coefficients were found to be 0.2 approx imately 0.5, fairly large values. The power spectral density for the f luctuating wind force shows almost the same shape regardless of the lo cation on the roof surface. With respect to the fluctuating wind press ure, the pressure fluctuation on the upper surface is larger in the hi gh frequency area. However, in the low frequency area, the pressure fl uctuation on the lower surface is larger. The fluctuation of the wind force acting on the roof shows an intermediate value for both surfaces . Furthermore, when the results of the response analysis and the vibra tion test are compared, it is found that both results correspond quite well to each other, and that aerodynamic negative damping do not act on the roof.