Hybrid Control of Seismic Response of Bridge Structures: A Coordinated Effort between the U.S. and Japan

本项目是在加州大学欧文分校（UCI）和公共工程研究所（PWRI）之间进行桥梁结构抗震混合控制的合作研究。日本建设省。主要目标是对桥梁结构抗震混合控制系统进行深入的理论/数值研究。特别是，将为PWRI目前正在开发的各种类型的混合控制系统开发控制算法。这些桥梁结构的混合控制系统包括变粘性阻尼器、变刚度控制装置、主动滑动隔离系统、主动基础隔离系统等。混合控制系统；主动控制与被动控制相结合的控制方法在减小大跨度桥梁结构在强震作用下的响应方面具有较好的效果和实用性。​抗震混合控制系统通常是高度非线性的（如主动滑动系统和变刚度装置）、非弹性的、（如主动橡胶支座隔离系统）或时变（如可变粘性阻尼器）。开发可集成到计算机/处理器和控制硬件中的控制算法，以实现桥梁结构的抗震混合控制，需要进一步的研究。​理论研究将在UCI进行，而硬件开发和实验测试将在PWRI进行。UCI开发的各种控制算法将用于实验测试。在PWRI获得的实验测试结果将与在UCI获得的相应理论/数值解相关联。实验和理论结果之间的差异将被检查、调查和纠正。

This project is to conduct collaborative research on aseismic hybrid control of Bridge structures between the University of California, Irvine (UCI), and the Public Works Research Institute (PWRI), Ministry of Construction, Japan. The main objective is to carry out in-depth theoretical/numerical studies of aseismic hybrid control systems for bridge structures. In particular, control algorithms will be developed for various types of hybrid control systems currently being developed at PWRI. These hybrid control systems for bridge structures include variable viscous dampers, variable stiffness control devices, active sliding isolation systems, active base isolation systems, etc. Hybrid control systems, which consist of a combination of passive and active control devices have been shown to be more effective and practical in reducing the response of long-span bridge structures subjected to strong earthquakes. Aseismic hybrid control systems are often highly nonlinear (such as active sliding systems and variable stiffness devices) inelastic, (such as active rubber-bearing isolation systems) or time-variant (such as variable viscous dampers). Research efforts are needed to develop control algorithms which could be incorporated into computer/processor and control hardware for aseismic hybrid control of bridge structures. Theoretical studies will be carried out at UCI, whereas hardware developments and experimental tests will be conducted at PWRI. Various control algorithms developed at UCI will be used in the experimental tests. Results of the experimental tests obtained at PWRI will be correlated with the corresponding theoretical/ numerical solutions obtained at UCI. Discrepancies between experimental and theoretical results will be examined, investigated and corrected.