Response control of building structures based on autonomous-decentralized semiactive control scheme

针对可控油液阻尼器的使用，研究者提出了变力阻尼器的概念，将其作为半主动-分散控制系统。基于这一概念，本文主要研究了磁流变阻尼器使用中的几个问题：磁流变阻尼器中的磁流变液中，强磁性微粒随着时间的推移沿着发生沉降。这种现象改变了磁流变液的某些力学性能。从数学处理的角度证明了理想弹塑性模型技术能有效地描述MR阻尼器的性能。利用这种建模技术，以阻尼器延性系数为2为目标的控制算法被证明在理想稳态正弦激励的情况下，使最佳的能量耗散。计算机仿真表明，基于MR阻尼器的变滑移力水平阻尼器即使在非平稳地震激励下，也可以使用该算法进行控制，并证明了使用自制微处理器的控制器可以与使用PC机的控制器一样有效地工作。此外，“协调-分散”系统的概念对于在局部区域进行建筑物的结构健康监测也是非常有效的。智能，无线传感器为基础的紧急评估方案，这些建筑物的分布式健康监测网络。

The head investigator has area proposed the concept of variable -force level dampers as autonomous-decentralized semiactive control system accounting for the use of controllable oil hydraulic dampers. Based upon the proposed concept this research mainly deals with several issues on the use of MR dampers.In MR fluid contained in MR dampers the sedimentation of strong magnetic corpuscles inside occurs along with the time passage. This phenomenon changes certain mechanical property of MR fluid. A control algorithm is proposed with this effect considered.From the mathematical treatment point of view, it is demonstrated that elastic perfectly plastic modeling technique effectively describes the behavior of MR dampers. Utilizing this modeling technique the control algorithm targeting at a damper ductility factor of two is proved to make optimum energy dissipation in case of ideal steady-state sinusoidal excitation. Computer simulations demonstrates that MR damper based variable slip-force level dampers could work out with this algorithm even during nonstationary seismic excitation,It is also demonstrated that the controller using a manufactured microprocessor could work as effectively as the controller using PC.In addition, the concept of "autonomous-decentralized" system is also very effective for conducting structural health monitoring of the buildings in certain local area. Smart, wireless sensor based urgent assessment scheme of those buildings is proposed as autonomous-decentralized health monitoring network.