Design of a fail-safe magnetorheological-based system for three-dimensional earthquake isolation of structures
Design of a fail-safe magnetorheological-based system for three-dimensional earthquake isolation of structures
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DOI：
10.1016/j.mechatronics.2019.102296
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发表时间：
2019-12-01
期刊：
影响因子：
3.3
通讯作者：
Eltahawy, Walaa
中科院分区：
文献类型：
--
作者：
Cesmeci, Sevki;Gordaninejad, Faramarz;Eltahawy, Walaa
本研究提出一个全面的设计方法，磁流变阻尼器装置的三维建筑隔离。该装置通过将液体刚度和可控磁流变阻尼特征结合在一个单元中而本身充当悬浮系统。与压缩模式相比，双线性液体刚度特征通过增加回弹模式中的刚度来增强对结构系统的整体摇摆/倾覆的抵抗力。在现场，该系统与广泛采用的传统弹性支座相结合，以减轻横向地震运动。在地震事件期间，该系统经受动态垂直摇动和大的横向力。理论和仿真建模，以克服这一重大挑战，并实现其他系统的要求。此外，一个全面的优化程序开发，以实现所有的设计要求。建模过程与实验结果进行了验证。此外，位移/速度为基础的控制的有效性进行了评估的单自由度系统的正弦载荷。
This study presents a comprehensive design methodology for a magnetorheological-based damper device for a three-dimensional building isolation. The device acts as a suspension system itself by combining the liquid stiffness and controllable magnetorheological damping features in one unit. The bi-linear liquid stiffness feature enhances resistance to global rocking/overturning of the structural system by increasing the stiffness in the rebound mode compared to the compression mode. In the field, the system is combined with the conventional elastomeric bearings widely employed to mitigate the lateral seismic motions. During a seismic event, the system is subjected to dynamic vertical shaking and large lateral forces. The theoretical and simulation modeling to overcome this major challenge and achieve other system requirements are presented. In addition, a comprehensive optimization program is developed to achieve all design requirements. The modeling procedure is verified with experimental results. Also, the effectiveness of Displacement/Velocity-based control for a single degree-of-freedom system subjected to sinusoidal loading is evaluated.