摘要

In order to better identify several wind load spectra of a long-span concrete-filled steel-tube transmission tower from displacements measured with wind tunnel tests, wind load identificaton processes were simulated with computer. Firstly, selecting three kinds of wind load spectra and exerting them on a model of transmission tower, the structure displacement power spectra were computed with random vibration method. Then, a method was introduced to identify several dynamic wind load spectra from the displacement power spectra of several measured points and error index was defined to evaluate identificaton effectiveness. Finally, effects of some factors, such as, measurement accuracy, number and position of measured points, modes taken and wind load coefficient, et al on accuracy of wind load identification were analyzed and some important conclusions were drawn so as to guide actual wind tunnel tests.

  • 出版日期2012

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