Study on Cable Parametric Vibrations

• Main Authors: Hong-Bin Pan, 潘弘斌
• Other Authors: Chern-Hwa Chen
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/36589153531211820928

碩士 === 國立高雄大學 === 土木與環境工程學系碩士班 === 99 === Cable-stayed bridges have become more and more popular in modern society due to their strong functionality and aesthetically appealing solution. In order to increase span, the addition of cable system makes the bridge more flexible and prone to vibrate under environmental and service loading such as wind, rain, traffic, and earthquake. The effects lead to significant new dynamic phenomena. In particular, high amplitude localized oscillations can arise in the stay cable. For cable stayed bridges, the global vibration amplitude of deck can be examined by wind tunnel testing. However, stay cables are very low-damped and flexible due to their length. Hence local vibrations of stay cables may be excited and are of critical importance from the safety point of view. In this paper, an analytic work is adopted to find out and to verify the mechanisms of local vibration of the stay cables subject to bridge deck excitations. A continuum model by using the analytical methods will be find out for the study of cables subjected to anchorage excitation. Finally, the effects of the non-linear planar dynamics on the stay cable are investigated by using Kao Ping Hsi cable-stayed bridge.