《Bridge engineering handbook桥梁工程手册-59主动控制》.pdf

59 Active Control in Bridge Engineering 59.1 Introduction 59.2 Typical Control Configurations and Systems Active Bracing Control • Active Tendon Control • Active Mass Damper • Base Isolated Bridge with Control Actuator • Base Isolated Bridge with Active Mass Damper • Friction-Controllable Sliding Bearing • Controllable Fluid Damper • Controllable Friction Damper 59.3 General Control Strategies and Typical Control Algorithms General Control Strategies • Single-Degree-of- Freedom Bridge System • Multi-Degree-of-Freedom Bridge System • Hybrid and Semiactive Control System • Practical Considerations 59.4 Case Studies Zaiguang Wu California Department of Concrete Box-Girder Bridge • Cable-Stayed Bridge Transportation 59.5 Remarks and Conclusions 59.1 Introduction In bridge engineering, one of the constant challenges is to find new and better means to design new bridges or to strengthen existing ones against destructive natural effects. One avenue, as a traditional way, is to design bridges based on strength the