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首页> 外文期刊>Bulletin of earthquake engineering >Optimum design of resilient sliding isolation system for seismic protection of equipments
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Optimum design of resilient sliding isolation system for seismic protection of equipments

机译：设备抗震弹性回弹隔离系统的优化设计

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摘要

Seismic isolation is one of the effective methods to protect equipments. It helps to keep seismic response accelerations in equipment below its allowable limits. Among different types of isolation systems, the combination of restoring spring and slider, also called as resilient sliding isolation (RSI) system, is the one which has been effectively used for protection of equipment. Principal design parameters for this type of isolation system are period of system (stiffness of spring) and friction coefficient of slider. There may be number of combinations of these design parameters which can enable the isolated equipment to remain functional during and after the predicted seismic event. The optimum design of RSI system can be considered as the one which maintains the response acceleration in the equipment below its allowable limit and at the same time keeps the relative displacement between floor and the equipment to the minimum. This study deals with optimum design of resilient sliding system. First the RSI system is modeled analytically by (i) precise and (ii) simplified SDOF models. The accuracy of the model is then validated by shaking table tests. The validated simplified SDOF model is then used to determine optimum design parameters for different levels of allowable accelerations. Results show that the optimum period decreases and the optimum friction coefficient increases with higher allowable acceleration.
机译：隔震是保护设备的有效方法之一。它有助于将设备的地震响应加速度保持在其允许极限以下。在不同类型的隔离系统中，复位弹簧和滑块的组合（也称为弹性滑动隔离（RSI）系统）已被有效地用于保护设备。这种隔离系统的主要设计参数是系统周期（弹簧刚度）和滑块的摩擦系数。这些设计参数可以有多种组合，可以使隔离的设备在预测的地震事件期间和之后保持功能。可以认为RSI系统的最佳设计是将设备中的响应加速度保持在其允许极限以下，同时将地板和设备之间的相对位移保持在最小。这项研究涉及弹性滑动系统的优化设计。首先，通过（i）精确和（ii）简化的SDOF模型对RSI系统进行分析建模。然后通过摇动表测试来验证模型的准确性。经过验证的简化SDOF模型然后用于确定不同水平的允许加速度的最佳设计参数。结果表明，随着允许加速度的增大，最优周期减小，最优摩擦系数增大。

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