Passive negative stiffness device for vibration control of coupled structures

用于耦合结构振动控制的被动负刚度装置

• 批准号: 21J10149
• 负责人: LONGJAM SONIA
• 金额: $ 1.09万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-04-28 至 2023-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21J10149/
• 关键词: Negative stiffness; Coupled structures; Adjacent buildings; Passive control; Vibration control; Transfer function; Optimization

Numerical investigation on linear and nonlinear time history seismic response simulation using the multi degree of freedom coupled vibration control (CVC) structures linked with negative stiffness were conducted. Coupled structures with different natural periods and structural parameters were used for time history seismic response simulation under various earthquake motions. As a result, the numerical study achieved an effective control performance upon installing the optimized negative stiffness at the connecting portion of the CVC model. The study also indicated that the reduction in the structural response of CVC systems subjected to input motions depends on the setting of the connecting elements. Validation of the theoretical and numerical investigations were done by conducting experiments using the shake table tests for CVC structures linked with passive negative stiffness device (PNSD) under dynamic excitations. Significant control performance of the CVC structures by incorporating a PNSD as the connector under seismic excitations was attained. The study experimentally and numerically elucidated the response behavior and control effects of CVC structural systems incorporating passive negative stiffness at the connection subjected to earthquakes. The research contributed to the advancement of aseismic technology of coupled or adjacent buildings utilizing the PNSD.

使用与负刚度相关的多自由度耦合振动控制（CVC）结构对线性和非线性时程地震响应模拟进行了数值研究。采用不同自然周期和结构参数的耦合结构进行不同地震作用下的时程地震反应模拟。结果，数值研究在CVC模型的连接部分安装优化的负刚度后获得了有效的控制性能。研究还表明，CVC 系统受到输入运动的结构响应的减少取决于连接元件的设置。通过使用动态激励下与被动负刚度装置 (PNSD) 连接的 CVC 结构的振动台测试进行实验，对理论和数值研究进行了验证。通过将 PNSD 并入地震激励下的连接器，CVC 结构获得了显着的控制性能。该研究通过实验和数值阐明了连接处结合被动负刚度的 CVC 结构系统在地震作用下的响应行为和控制效果。该研究促进了利用 PNSD 的耦合或相邻建筑物抗震技术的进步。

项目成果

Negative Stiffness as the Seismic Response Controller of Coupled Structures

负刚度作为耦合结构的地震响应控制器

• 发表时间: 2023
• 作者: Sonia Longjam;Kazutaka Shirai
• 通讯作者: Kazutaka Shirai

Numerical investigation of earthquake response reduction effects by negative stiffness connection for adjacent building structures.

通过相邻建筑结构负刚度连接减少地震反应效果的数值研究。

• DOI: 10.1016/j.istruc.2022.01.078
• 发表时间: 2022
• 期刊: Structures
• 影响因子: 4.1
• 作者: Sonia Longjam;Kazutaka Shirai
• 通讯作者: Kazutaka Shirai

Use of negative stiffness for coupled vibration control structures: an analytical investigation

负刚度在耦合振动控制结构中的应用：分析研究

• 发表时间: 2021
• 作者: Sonia Longjam;Kazutaka Shirai
• 通讯作者: Kazutaka Shirai