Abstract
Inerter-based vibration control systems have been developed rapidly in recent years. However, previous studies mainly focus on the development of new devices and parameter optimization strategies, while ignoring the improvements in the utilization efficiency of the inerter system that the bracing system and novel installation methods may bring. In this paper, a cross-layer installed cable-bracing inerter system (CICBIS) is proposed to improve the utilization efficiency of the inerter system, which can cross more layers and is suitable for shear-type multi-degree-of-freedom (MDOF) structures. A demand-based cable-bracing inerter system (CBIS) design method is developed. The mass enhancement and utilization efficiency improvement of the inerter system caused by the cross-layer installation are quantified through calculating the effective inerter-mass ratio of the CBIS-equipped MDOF structure. A 10-story benchmark structure is used to verify the control performance of the CICBIS and the design method. The analysis results show that the proposed design method can exert the cable-bracing system’s adjustability and the damping enhancement of the inerter system. The CICBIS can reduce the total apparent mass and damping coefficient requirements of the inerter systems without increasing the control force. It means that the proposed design method is effective, and the CICBIS has a high efficiency.
Highlights
Since the concept of a structural control was proposed [1,2,3], it has been widely used to improve the performance of buildings under various excitations, especially for those in earthquake-prone areas.In recent years, the introduction of inerters, a novel mechanical element [4], further developed the control strategies
The liquid mass pump developed by Kawamata [10] in the 1970s is regarded as the bud of the two-terminal inerter element and was initially utilized as an auxiliary mass to modify the natural frequency of the structure for its high inertial resistance
The demand-based design method is adopted to optimize the parameters of the cable-bracing inerter system (CBIS) to ensure the vibration performance of the structure while reducing the cost of manufacturing and installing the CBISs
Summary
The introduction of inerters, a novel mechanical element [4], further developed the control strategies. The liquid mass pump developed by Kawamata [10] in the 1970s is regarded as the bud of the two-terminal inerter element and was initially utilized as an auxiliary mass to modify the natural frequency of the structure for its high inertial resistance. Researchers found that combing the inerter in series or parallel with springs and damping elements could achieve a better energy dissipation capability. Ikago and his coworkers [5,13,14] proposed a tuned viscous mass damper
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