| Popis: |
The paper compares the measured response of one building, Hume Point, with that predicted by several current design methods and wind tunnel studies. It also shows how dependent the design methods are on the accuracy of the input data. Full-scale tests were carried out on Hume Point to determine its dynamic response to within ±10%. The measured along-wind response of Hume Point was then compared with that predicted by five different calculation methods. The highest estimate was over twice that of the lowest estimate, the measured full-scale response being between the two. Three parameters which are required by all the predictive methods to calculate the response of a tall building to wind loading are natural frequency, structural damping and mass. They all have a large influence on the overall response and there are large uncertainties associated with estimating them at the design stage. At the design stage, it is suggested that the uncertainty level in the estimation of the along-wind peak acceleration response in a translational mode of a tall building is about a factor of two, i.e of − 50%, + 100%. |
