Spherical sliding isolation bearings with adaptive behavior: Theory
Spherical sliding isolation bearings with adaptive behavior: Theory
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DOI：
10.1002/eqe.751
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发表时间：
2008-02
影响因子：
4.5
通讯作者：
D. Fenz;M. Constantinou
中科院分区：
文献类型：
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作者：
D. Fenz;M. Constantinou
介绍了三种新型球面滑动隔震支座的工作原理和力-位移关系。这些轴承是完全被动的设备，但表现出自适应刚度和自适应阻尼。也就是说，刚度和阻尼在可计算和可控制的位移幅度处改变为可预测的值。自适应行为的主要好处是，给定的隔震系统可以针对多个性能目标和/或多个水平的地面震动进行单独优化。通过这里介绍的设备，这是通过使用本质上不比土木工程专业目前使用的技术复杂的技术来实现的。内部结构由各种凹面组成，并且行为由在运动过程中可能发生滑动的表面的不同组合决定。当滑动发生的表面改变时，刚度和有效摩擦相应地改变。提出了一种方法，用于确定哪些表面是积极的，在任何给定的时间的基础上的有效曲率半径，摩擦系数和位移能力的每个滑动表面。力-位移关系和相关参数的兴趣，随后推导出基于第一原理。版权所有© 2007约翰威利父子有限公司。
The principles of operation and force–displacement relationships of three novel spherical sliding isolation bearings are developed in this paper. These bearings are completely passive devices, yet exhibit adaptive stiffness and adaptive damping. That is, the stiffness and damping change to predictable values at calculable and controllable displacement amplitudes. The primary benefit of adaptive behavior is that a given isolation system can be separately optimized for multiple performance objectives and/or multiple levels of ground shaking. With the devices presented here, this is accomplished using technology that is inherently no more complex than what is currently used by the civil engineering profession. The internal construction consists of various concave surfaces and behavior is dictated by the different combinations of surfaces upon which sliding can occur over the course of motion. As the surfaces upon which sliding occurs change, the stiffness and effective friction change accordingly. A methodology is presented for determining which surfaces are active at any given time based on the effective radius of curvature, coefficient of friction and displacement capacity of each sliding surface. The force–displacement relationships and relevant parameters of interest are subsequently derived based on the first principles. Copyright © 2007 John Wiley & Sons, Ltd.