Semiactive damping of stay cables: A preliminary study

Erik A. Johnson, Billie F. Spencer, Yozo Fujino

Research output: Contribution to journalConference articlepeer-review


Stay cables, such as used in cable-stayed bridges, are prone to vibration due to their low inherent damping characteristics. Several studies have investigated the use of an optimal viscous damper attached transversely to dampen such vibration. This paper investigates the potential for improved damping using a semiactive device. The equations of motion of the cable/damper system are derived and the effectiveness of various levels of attached viscous damping are reviewed. The response of a cable with linear viscous, active, and semiactive dampers are studied. The response with a semiactive damper is found to be 55% better than the optimal linear viscous damper, thus demonstrating the efficacy of a semiactive damper for absorbing cable vibratory energy.

Original languageEnglish (US)
Pages (from-to)417-423
Number of pages7
JournalProceedings of the International Modal Analysis Conference - IMAC
StatePublished - 1999
Externally publishedYes
EventProceedings of the 1999 17th International Modal Analysis Conference, IMAC. Part 1 (of 2) - Kissimmee, FL, USA
Duration: Feb 8 1999Feb 11 1999

ASJC Scopus subject areas

  • Engineering(all)


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