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논문 기본 정보

자료유형
학술저널
저자정보
Fangdian Di (Tongji University) Limin Sun (Tongji University) Lin Chen (Tongji University)
저널정보
국제구조공학회 Smart Structures and Systems, An International Journal Smart Structures and Systems, An International Journal Vol.26 No.5
발행연도
2020.1
수록면
575 - 589 (15page)

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For vibration control of stay cables in cable-stayed bridges, viscous dampers are frequently used, and they are regularly installed between the cable and the bridge deck. In practice, neoprene rubber bushings (or of other types) are also widely installed inside the cable guide pipe, mainly for reducing the bending stresses of the cable near its anchorages. Therefore, it is important to understand the effect of the bushings on the performance of the external damper. Besides, for long cables, external dampers installed at a single position near a cable end can no longer provide enough damping due to the sag effect and the limited installation distance. It is thus of interest to improve cable damping by additionally installing dampers inside the guide pipe. This paper hence studies the combined effects of an external damper and an internal damper (which can also model the bushings) on a stay cable. The internal damper is assumed to be a High Damping Rubber (HDR) damper, and the external damper is considered to be a viscous damper with intrinsic stiffness, and the cable sag is also considered. Both the cases when the two dampers are installed close to one cable end and respectively close to the two cable ends are studied. Asymptotic design formulas are derived for both cases considering that the dampers are close to the cable ends. It is shown that when the two dampers are placed close to different cable ends, their combined damping effects are approximately the sum of their separate contributions, regardless of small cable sag and damper intrinsic stiffness. When the two dampers are installed close to the same end, maximum damping that can be achieved by the external damper is generally degraded, regardless of properties of the HDR damper. Field tests on an existing cable-stayed bridge have further validated the influence of the internal damper on the performance of the external damper. The results suggest that the HDR is optimally placed in the guide pipe of the cable-pylon anchorage when installing viscous dampers at one position is insufficient. When an HDR damper or the bushing has to be installed near the external damper, their combined damping effects need to be evaluated using the presented methods.
#stay cable #vibration control #sag effect #viscous damper #HDR damper #modal damping #parameter optimization

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참고문헌 (52)

참고문헌 신청
Luca Caracoglia / 2007 / Damping of Taut-Cable Systems: Two Dampers on a Single Stay / Journal of Engineering Mechanics 133(10):1050~1060 Crossref Carne, T. G. / 1981 / Guy cable design and damping for vertical axis wind turbines google schola Lin Chen / 2017 / Steady-State Analysis of Cable with Nonlinear Damper via Harmonic Balance Method for Maximizing Damping / Journal of Structural Engineering 143(2):04016172 Crossref Chen, Z. Q. / 2003 / MR damping system on Dongting lake cablestayed bridge / Proceedings of the Smart Structures and Materials 2003: Smart Systems and Nondestructive Evaluation for Civil Infrastructures: International Society for Optics and Photonics google schola Lin Chen / 2015 / Cable with discrete negative stiffness device and viscous damper: passive realization and general characteristics / Smart Structures and Systems, An International Journal 15(3):627~643 dbpia

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