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Realization of Semi-active Control by MR dampers in Multi-Story Building Structures

多层建筑结构中磁流变阻尼器半主动控制的实现

基本信息

批准号：
15560503
负责人：
SODA Satsuya
金额：
$ 2.3万
依托单位：
Waseda University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

项目摘要

In the first year, a small MR damper with the maximum resistance of nearly 300N was designed and manufactured. Through a series of sinusoidal loading test, the stability of mechanical behavior of the damper was confirmed. It was also confirmed that the analytical model of the damper could be represented by a simple combination of a dashpot and a variable Coulomb slider, which is called a Bingham model. The exact ness of the model was confirmed by comparing the two load-deflection relations, experimental and simulated ones, obtained by a random loading test. Prior to the shake table test of a scaled steel frame subject to semi-active-control, damping property of the frame alone and the one with passive viscous dampers are studied. Then, the MR damper was installed into the frame and the effectiveness of semi-active control, simulating origin-restoring friction damper, was confirmed. It was found that the only negative point with the damper was that the resistance of the damper tends to be delayed to the input signal to control the capacity of the damper.In the following year, another small MR damper to perform semi-active control on base-isolated building model was manufactured. Mechanical behaviors of the damper were again represented by the Bingham model. In the case of base-isolated building model with the natural period of 2-3 seconds, the time lag of the resistance with regard to input control signal was found almost negligible. In this case, two types of semi-active control algorithms were made use of and compared. One is an instantaneous optimum control algorithm and the other is based on the balance between the half-cycle input seismic energy into the building and the hysteretic energy absorbed in the damper.

第一年，设计并制造了最大阻力近300N的小型磁流变阻尼器。通过一系列正弦加载试验，证实了阻尼器力学行为的稳定性。还证实了阻尼器的解析模型可以用阻尼器和可变库仑滑块的简单组合来表示，称为宾厄姆模型。通过比较随机加载试验获得的实验和模拟两种载荷-挠度关系，证实了该模型的准确性。在对半主动控制的比例钢框架进行振动台试验之前，对框架单独和带有被动粘滞阻尼器的框架的阻尼特性进行了研究。然后，将磁流变阻尼器安装到车架上，并验证了模拟恢复原点摩擦阻尼器的半主动控制的有效性。结果发现，该阻尼器的唯一缺点是阻尼器的阻力往往会延迟到输入信号以控制阻尼器的能力。次年，制造了另一种小型磁流变阻尼器，用于对基础隔震建筑模型进行半主动控制。阻尼器的机械行为再次由宾厄姆模型表示。在自然周期为2-3秒的基础隔离建筑模型的情况下，发现电阻相对于输入控制信号的时间滞后几乎可以忽略不计。在这种情况下，使用并比较了两种类型的半主动控制算法。一种是瞬时最优控制算法，另一种是基于输入建筑物的半周期地震能量与阻尼器吸收的滞后能量之间的平衡。