WIND INDUCED RESPONSE OF A CABLE SUPPORTED STADIUM ROOF

The first section of the paper describes the results of a wind tunnel investigation of the behaviour of wind of the cable supported roof of the "Stadio delle Alpi", Turin, Italy. The results presented and discussed include local and area-averaged pressures on the roof and the motions observed on a 1:200 aeroelastic model. It is shown that the major part of the loading is dynamic in nature and is due to vortices formed in the wake of the upstream sector of the roof and producing vertical velocity fluctuations in the flow approaching the leading edge of the downstream sector. The second section of the paper is concerned with the difficulties of presenting the experimental data to the designer in a form which could be readily brought into the design and analysis process and to the discussion of improved experimental techniques which might surmount those difficulties in future studies of similar structures. The improved approach involves the use of a multi-point high speed pressure scanning system and the formation of a suitable set of load pattern time histories.