碩士 / 中原大學 / 土木工程研究所 / 102 / Finite element models of stay cables with attached viscous dampers of cable-stayed bridges are developed in this study. Based on these models, the complex modal analysis is adopted to calculate the natural frequency, damped frequency, damping ratio, mode shape and the curve of damping ratio versus damper coefficient of viscous damper for each mode of the system. The mentioned curve can be provided to determine the optimal damping ratio and the corresponding optimal damper coefficient of viscous damper for each mode of the system. Numerical examples are presented to estimate the optimal parameters of viscous dampers and their effectiveness for vibration control of stay cables with the consideration of the cable inclination, the cable initial shape and the deck-stay interaction of cable-stayed bridges. Under considerations of these optimal parameters, the seismic time history analysis is conducted to calculate the structural responses for two types of systems: without control and passive control, which can be used to assess the effectiveness of viscous damper. The results indicate that the viscous damper with optimal damper coefficient can be applied to effectively reduce the stay cable vibration of cable-stayed bridges.
| Identifer | oai:union.ndltd.org:TW/102CYCU5015024 |
| Date | January 2014 |
| Creators | Jhe-Wei Ye, 葉哲維 |
| Contributors | Ming-Yi Liu, 劉明怡 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 144 |
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