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Dimensional Analysis of Inelastic Structures with Negative Stiffness and Supplemental Damping Devices
| 题名： | Dimensional Analysis of Inelastic Structures with Negative Stiffness and Supplemental Damping Devices |
| 正文语种： | 英文 |
| 作者： | Zhan Shu; Jian Zhang, A.M.ASCE;Satish Nagarajaiah, M.ASCE |
| 作者单位： | Tongji Univ;Univ, of California, Los Angeles;Rice Univ |
| 关键词： | Seismic protection; Negative stiffness; Supplemental damping; Dimensional analysis; Optimal design; Seismic effects. |
| 摘要： | A negative stiffness device (NSD) has been proposed as an innovative way for seismic protection of structures. It was shown both numerically and experimentally to improve the performance of inelastic structures when it is appropriately designed for the given application. In order to systematically evaluate the effects of a NSD, dimensional analysis is used in this study to quantify the structural responses as the function of input ground motion characteristics, model parameters of structure and NSD, as well as supplemental damping. To facilitate this, a simplified yet parameterized numerical model is first proposed to mimic the observed responses of the tested prototype NSD. The dimen-sional analysis is then conducted on a single degree of freedom (SDOF) system equipped with both a NSD and a nonlinear damper.By comparing the dimensionless structural responses for the cases of (1) inelastic structure only, (2) inelastic structure with nonlinear damper, and (3) inelastic structure with both nonlinear damper and NSD when subject to various pulse type motions, the effectiveness of a NSD is investigated thoroughly. Finally, the optimal ranges of NSD model parameters are also identified. DOI: 10.1061/(ASCE)ST.1943-541X.0001658.© 2016 American Society of Civil Engineers. |
| 出版日期： | 2017.03 |
| 出版年： | 2017 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.143 |
| 期： | NO.03 |
| 页码： | 04016184 |
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