高層結構物受風力作用後，所造成之橫風向與扭轉向振動會促使結構物產生複雜的氣動力現象，本研究將針對橫風向振動與扭轉向振動間發生耦合現象時結構物所產生之氣動力現象做深入之探討。透過風洞之氣動力模型，在平滑流場下以不同深高比的矩柱考慮純橫風向及橫風向加上扭轉向之振動，藉由改變振動與扭轉之頻率及扭轉角度，來探討當耦合現象產生時，結構物所產生之氣動力變化狀況。 Wind load, a very important factor that contributes to the stabilityand durability of a structure, could cause an interesting effect onhigh-rise buildings. Such an effect takes place when the frequency ofacross-wind vibration exerted on the high-rise building coincides withthe frequency of torsional vibration, resulting in a complexaerodynamic phenomenon. This study was focused on the coupling ofacross-wind and torsional vibrations of two-demensional rectangularprisms. The experiments were carried out by placing the small-scaleaerodynamic model in a laboratory wind tunnel that is capable ofgenerating both across-wind vibration and torsional vibration. Fromthe results of wind tunnel tests, the relationship between theaerodynamic coefficients and a set of variables including vibratingfrequency, torsional frequency, and torsional angle, was established.
Relation:
八十九年度中華民國力學學會年會暨第二十四屆全國力學會議論文集=24th National Conference on Applied and Theoretical Mechanics, 頁N.A.(CD)
