Passive negative stiffness device for vibration control of coupled structures

对负刚度多自由度耦合振动控制(CVC)结构的线性和非线性时程地震反应进行了数值模拟。采用不同自振周期和不同结构参数的耦合结构，对不同地震动下的时程地震反应进行了模拟。结果表明，在CVC模型连接部安装优化的负刚度后，数值研究取得了较好的控制效果。研究还表明，CVC系统在输入运动作用下结构响应的减小取决于连接单元的设置。通过对带有被动负刚度装置(PNSD)的CVC结构在动力激励下的振动台试验，对理论和数值研究进行了验证。通过引入PNSD作为连接件，CVC结构在地震激励下获得了显著的控制性能。本研究从试验和数值上阐明了在节点处加入被动负刚度的CVC结构体系在地震作用下的反应行为和控制效果。这项研究为利用PNSD的连体或相邻建筑抗震技术的进步做出了贡献。

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.