Investigation on a vertical isolation system with quasi-zero stiffness for building structures

被引：0
|
作者：
Zhou Y. [1 ]
Chen P. [1 ]
机构：
[1] State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2019年 / 40卷 / 04期
关键词：
Harmonic balance method; Numerical analysis; Quasi-zero stiffness; Transmissibility; Vertical isolation;
D O I：
10.14006/j.jzjgxb.2019.04.015
中图分类号：
学科分类号：
摘要：
A vertical isolation system with quasi-zero stiffness (QZS) for buildings is proposed to isolate the earthquake and environmental vibration. The motion controlling equation is established based on the force-displacement relation of the system, while the amplitude-frequency response and transmissibility are derived using the harmonic balance method. Numerical simulation was conducted to find that the numerical results correlate well with the theoretical results. Based on the transmissibility curves, a parameter study is performed to investigate the frequency drift and the variation of transmissibility values influenced by the response amplitude and damping ratio. Compared with the equivalent linear isolation system, the advantages of adopting the QZS isolation system lie on the lower resonant frequency and smaller transmissibility value. In the further study, the mechanical model of QZS system is implemented in OpenSees software. A base isolation model is established and vertical earthquake and metro vibration are considered as excitations, respectively to evaluate the isolation effect of QZS system. © 2019, Editorial Office of Journal of Building Structures. All right reserved.
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页码：143 / 150
页数：7
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