A Study On The Application Of Proper Orthogonal Decomposition In Wind Loads And Dynamic Wind Response Of High Rising Buildings

Fluctuating wind pressures acting on buildings are complicated functions of both time and space. Some studies have applied the proper orthogonal decomposition (POD) technique to such random wind pressure field to identii~?hidden deterministic structures. However, the pressure taps are nearly uniformly distributed in the distributed manner. The applied models are low-rising buildings or simple systematic high-rising buildings. In this study, an idea that the pressures of points are replaced with the pressures of the panels is presented, and is accurately identified in the POD of a simple model. Not only does this idea break the traditional distributed mariner, but also improves the precision of the reconstruction, and also makes the POD applying to the complicated high-rising buildings successfully. According to the results of the POD, the double modal transformation technique is adopted to get the dynamic responses of the structures in this study, and the following facts are found: the effect of the analysis by the pressures of the panels is greatly better than the one by the pressures of the points, not only in the proper orthogonal decomposition and reconstruction but also in the solution of dynamic wind response of structures. But the modes whose contributions are really great or much more modes are selected for the complicated buildings. In this study, three frequency-response tests of the pipe system measuring pressures are done, and the fact is found that the test values have a wonderful agreement at low frequencies with the academic values calculated by the transferring matrix founded on the base of the highly accurate dissipation model of liquid pipelines. Therefore, when disposing of the data, the numeric calculations are applied to modify the aberrance of the signals instead of the experimental technique.