地震作用下基于skyhook的钢结构建筑监测与控制

N. Caterino, M. Spizzuoco, A. Occhiuzzi
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引用次数: 5

摘要

天钩阻尼是最有前途的结构振动反馈控制技术之一。它基于通过被动耗散装置将结构连接到空间的理想不动点的想法。通过振动台试验,研究了半主动天钩阻尼对某两层钢框架的抗震效果。这种SA控制是通过连续监测选定的结构响应参数和使用可变阻尼器来实现的。后者的阻尼特性是实时变化的,以使阻尼器提供的力与期望的SH阻尼力尽可能地匹配。为此,在框架的第一层安装了两个原型磁流变阻尼器,并由SH控制器远程驱动。通过对楼板加速度和层间漂移的分析,验证了控制策略的有效性。最后讨论了监测活动所需的测量系统实施的实际问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Skyhook-based monitoring and control of a steel building under seismic action
Sky-hook damping is one of the most promising techniques for feedback control of structural vibrations. It is based on the idea of connecting the structure to an ideal fixed point of the space through passive dissipative devices. Herein the benefit of semi-active (SA) sky hook (SH) damping is investigated for seismic protection of a two-story steel frame via shaking table tests. This kind of SA control is achieved implementing a continuous monitoring of selected structural response parameters and using variable dampers. The damping properties of the latter are changed in real-time so as to make the force provided by the damper match the desired SH damping force as closely as possible. To this aim, two prototype magnetorheological dampers have been installed at the first level of the frame and remotely driven by a SH controller. The high effectiveness of the control strategy is proved comparing the floor accelerations and interstory drift in both uncontrolled and controlled configurations. Practical issues about the implementation of the measurement system needed for the monitoring activity are finally discussed.
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