Seismic response of high-rise isolated building based on negative stiffness device with damping

被引：0
作者：
Liu W. [1 ]
Yu X. [1 ]
Xu H. [1 ]
Zhu H. [2 ]
机构：
[1] Department of Civil Engineering, Shanghai University, Shanghai
[2] School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan
来源：
| 1600年 / Science Press卷 / 41期
关键词：
High-rise building; Negative stiffness device; Optimum ratio of negative stiffness; Preload spring; Seismic response; Static test;
D O I：
10.14006/j.jzjgxb.2018.0171
中图分类号：
学科分类号：
摘要：
A negative stiffness device with damping is designed based on deformation characteristics of preload spring. The negative stiffness effect is achieved through prepressing spring which provides load in the same direction with the deformation.The viscous damper is used to provide damping performance. According to the thought above, a set of model devices were assembled to carry out static test research. Based on the test results, a mechanical model of the new negative stiffness device was proposed. The mechanical properties of the negative stiffness device depended on spring stiffness, spring length and spring compression. The dynamic analysis model of negative stiffness isolation system was established, and the optimum parameter selection method of negative stiffness device was put forward. The selection of negative stiffness parameters depended on the damping ratio of isolation bearing. The negative stiffness device was used in a high-rise isolated structure and the dynamic analysis was accomplished. The results show that the device can not only decrease the acceleration response of the upper structure and inter-story drift, but also limit the displacement response of the isolated story effectively. The acceleration response and displacement response can be both controlled subjected to rare earthquake. © 2020, Editorial Office of Journal of Building Structures. All right reserved.
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页码：36 / 44
页数：8
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