A Study on Base Isolation Performance of Magneto-Sensitive Rubbers
A Study on Base Isolation Performance of Magneto-Sensitive Rubbers
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DOI：
10.5000/eesk.2006.10.4.077
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Inho Hwang;Jong-Hyuk Lim;Jong-Seh Lee
中科院分区：
文献类型：
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作者：
Inho Hwang;Jong-Hyuk Lim;Jong-Seh Lee
近年来，随着高层建筑、大跨度桥梁等大型结构的轻量化和柔性化，对结构进行控制以减小地震激励引起的过大的动力响应的必要性日益增加。在这项研究中，提出了一种半主动基础隔震系统，使用磁敏（MS）橡胶有效地保护结构免受地震。MS橡胶是一类智能可控材料，其机械性能通过施加磁场而瞬间改变。为了证明该装置的性能，MS橡胶隔震系统进行了比较，铅芯橡胶支座（LRB）隔震系统和判断的基础上计算的几个历史地震的反应。MS橡胶隔震系统的基础漂移比类似的被动系统显着减少，没有伴随的基础剪力或在加速度赋予上部结构的增加。建议的MS橡胶系统表现出比被动隔振系统更好。
Recently, as large structures such as high-rise building and long span bridge become lighter and more flexible, the necessity of structural control for reducing excessive dynamic response due to seismic excitation is increased. In this study, a semi-active base isolation system using Magneto-Sensitive (MS) rubbers is proposed to effectively protect structures against earthquakes. MS Rubber is a class of smart controllable materials whose mechanical properties change instantly by the application of a magnetic field. To demonstrate the performance of this device, the MS Rubber isolation system is compared to Lead-Rubber Bearing (LRB) isolation systems and judged based on computed responses to several historical earthquakes. The MS Rubber isolation system is shown to achieve notable decreases in base drifts over comparable passive systems with no accompanying increase in base shears or in accelerations imparted to the superstructure. The proposed MS Rubber system is shown to perform better than the passive isolation system.