Analysis and Vibration Control of Stayed Cable
Date Issued
2011
Date
2011
Author(s)
Huang, Chin-Yang
Abstract
Because of economic advantages and aesthetic qualities, cable-stayed bridges have been increasing popularity over the last three decades. However, the stay cables are prone to vibration due to their low inherent damping characteristics, and this characteristic will even make cable-stayed bridges unstable. The vibration of cable may cause the failure of the cable anchorage due to metal fatigue. Therefore, researchers have proposed to use different control devices, either passive or semi-active, to reduce the cable motion. To study the vibration suppression of stay cable interacted with deck , a scaled-down cable-deck specimen is designed and constructed in NCREE, Taiwan. The length of the cable is about 9.0 meter with one end on the reaction wall and one end at the cantilever beam (simulate the bridge deck).A shaker which can generate sinusoidal force on the cable was used and installed in the middle point of the cable to generate the sinusoid excitation with various amplitudes and frequencies. One MR damper was attached at the end of cable (at 1/10 length of the cable) and the deck to mitigate the vibration of stay cable. The upper end of the suspended cable(about 9 meters) is anchored to the reaction wall and lower end anchored to the steel deck(about 12 meters).Besides the passive control study, three different semi-active control algorithms are use in this study which include: Decentralized Sliding Mode Control, Max Energy Control and Modulated Homogeneous Control. Only local measurement is used to evaluate the control command(with damper Stroke and damper Force Feedback).A series of test are carried out to investigate the control performance. Comparison among the uncontrol case passive-on control test and semi-active control test are made. Through the experimental test results, the performance of MR damper and the control effectiveness are examined.
Subjects
Stay cables
MR-damper
Semi-active control
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-100-R98521246-1.pdf
Size
23.32 KB
Format
Adobe PDF
Checksum
(MD5):c37faabd742bad28e4b6d82ede799e9b