A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Negative stiffness characteristics of active and semi‐active control systems for stay cables
10.1002/stc.200.abs
This paper examines the characteristics and effects of negative stiffness with active and semi‐active control of stay cables for vibration reduction. The characteristics of negative stiffness of stay cable active and semi‐active control are presented through numerical simulations. Three indices are defined to quantify the degree of negative stiffness. A pseudo‐viscoelastic (P‐VE) damper is proposed to replace an active or semi‐active device to carry out numerical and theoretical analysis. An asymptotic solution of damping ratio of the combined cable/P‐VE damper is obtained and the approximate optimal damping ratio of the combined cable/P‐VE damper is further derived. The relationship between optimal damping ratio and the damping coefficient of the P‐VE damper with various stiffness (both of negative and positive stiffness) is calculated by using the asymptotic solution and compared with that evaluated by using numerical analysis. The effect of negative stiffness on response reduction of cables is demonstrated by the improved energy dissipation ability of the damper and the increased approximate damping ratio because of the enhanced displacement of the cable at the location where it is attached to the damper. Copyright © 2007 John Wiley & Sons, Ltd.
Negative stiffness characteristics of active and semi‐active control systems for stay cables
10.1002/stc.200.abs
This paper examines the characteristics and effects of negative stiffness with active and semi‐active control of stay cables for vibration reduction. The characteristics of negative stiffness of stay cable active and semi‐active control are presented through numerical simulations. Three indices are defined to quantify the degree of negative stiffness. A pseudo‐viscoelastic (P‐VE) damper is proposed to replace an active or semi‐active device to carry out numerical and theoretical analysis. An asymptotic solution of damping ratio of the combined cable/P‐VE damper is obtained and the approximate optimal damping ratio of the combined cable/P‐VE damper is further derived. The relationship between optimal damping ratio and the damping coefficient of the P‐VE damper with various stiffness (both of negative and positive stiffness) is calculated by using the asymptotic solution and compared with that evaluated by using numerical analysis. The effect of negative stiffness on response reduction of cables is demonstrated by the improved energy dissipation ability of the damper and the increased approximate damping ratio because of the enhanced displacement of the cable at the location where it is attached to the damper. Copyright © 2007 John Wiley & Sons, Ltd.
Negative stiffness characteristics of active and semi‐active control systems for stay cables
Li, Hui (author) / Liu, Min (author) / Ou, Jinping (author)
Structural Control and Health Monitoring ; 15 ; 120-142
2008-03-01
23 pages
Article (Journal)
Electronic Resource
English
Negative stiffness characteristics of active and semi-active control systems for stay cables
| Online Contents | 2008
Multimode vibration control of stay cables using optimized negative stiffness damper
| Wiley | 2020
Optimized negative stiffness damper with flexible support for stay cables
| Wiley | 2021
Optimal semi-active damping of cables with bending stiffness
| British Library Online Contents | 2011