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 A Study on Combination of Two Friction Dampers to Control Stayed-cable Vibration under considering its Bending Stiffness
Tác giả hoặc Nhóm tác giả: Duy-Thao Nguyen, Duy-Hung Vo
Nơi đăng: Lecture Notes in Civil Engineering (Index by Scopus); Số: Volume 54;Từ->đến trang: 87-92;Năm: 2019
Lĩnh vực: Kỹ thuật; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
The stayed-cable is one of vital component of cable-stayed bridges.Stayed-cable is often very long with a small diameter and low mass, which canbe considered horizontal flexible structure with very low natural frequency.Under the influence of cyclic load in specific conditions, stayed-cable can storethe energy and vibrate with large amplitude. This paper focuses on studying themethods of two-friction damper combination for reducing the cable vibration,and evaluates the capacity of friction-damper parameters in mitigating the vibrationof stayed-cable. The results show the relationship between the dampingfactor of stayed-cable and various parameters such as Equivalent viscous constants,friction, spring constant, points attached damper to stayed-cable. Forlong-span cable-stayed bridges, cable has relatively large diameter and it isnormally covered by grouting mortar or Epoxy. Consequently, its bending stiffnessis considerably increased. Therefore, it is necessary to take into account itsbending stiffness during the vibration analysis process. From these results, designerscan assess and choose the attaching point as well as parameters of frictiondamper, which are optimal for specific stayed-cable
ABSTRACT
The stayed-cable is one of vital component of cable-stayed bridges.Stayed-cable is often very long with a small diameter and low mass, which canbe considered horizontal flexible structure with very low natural frequency.Under the influence of cyclic load in specific conditions, stayed-cable can storethe energy and vibrate with large amplitude. This paper focuses on studying themethods of two-friction damper combination for reducing the cable vibration,and evaluates the capacity of friction-damper parameters in mitigating the vibrationof stayed-cable. The results show the relationship between the dampingfactor of stayed-cable and various parameters such as Equivalent viscous constants,friction, spring constant, points attached damper to stayed-cable. Forlong-span cable-stayed bridges, cable has relatively large diameter and it isnormally covered by grouting mortar or Epoxy. Consequently, its bending stiffnessis considerably increased. Therefore, it is necessary to take into account itsbending stiffness during the vibration analysis process. From these results, designerscan assess and choose the attaching point as well as parameters of frictiondamper, which are optimal for specific stayed-cable
[ 2019\2019m010d023_8_50_2FULL_SCOPUS-Two_friction_damper.pdf ]
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