단면형상변화 따른 플레이트거더단면의 공기역학적 진동특성에 관한 실험적 연구
Experimental Study on the Aerodynamic Characteristics of Plate-Girder Sections due to Change of Sectional Shape
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In this study, wind tunnel tests are carried out to investigate the effects of sectional shape on aerodynamic vibration of plate girder sections. The aspect ratios of employed models are in the range of 2.5 to 15 where the number of main girder is two or three. As the results of response tests, the maximum amplitude of vertical vortex-induced oscillation decreases with increasement of aspect ratio of models. However, in the case of torsional mode, as aspect ratio increases, the maximum amplitude becomes increased. Torsional flutter occurs in all of employed sections, but galloping occurs only in the case of aspect ratio of 2.5. The 3-girder sections have better aerodynamic stability compared with 2-girder sections in a general way.
Abstract
In this study, wind tunnel tests are carried out to investigate the effects of sectional shape on aerodynamic vibration of plate girder sections. The aspect ratios of employed models are in the range of 2.5 to 15 where the number of main girder is two or three. As the results of response tests, the maximum amplitude of vertical vortex-induced oscillation decreases with increasement of aspect ratio of models. However, in the case of torsional mode, as aspect ratio increases, the maximum amplitude becomes increased. Torsional flutter occurs in all of employed sections, but galloping occurs only in the case of aspect ratio of 2.5. The 3-girder sections have better aerodynamic stability compared with 2-girder sections in a general way.
참고문헌 (15)
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