斜拉桥横向振动的半主动筋腱控制

Semi-active Tendon Control to Transitive Vibration of Cable-Stayed Bridge

对桥梁等大型土建结构在外扰作用下的振动实施控制是目前的一个研究热点 ,也是提高结构安全性与耐久性的一条重要途径。本文提出采用磁流变阻尼器( Magneto- Rheological Damper,MRD)与斜拉索构成的半主动筋腱 ( Semi- ActiveTendon)实现斜拉桥横向振动的半主动控制的原理 ,讨论了其可行性、具体控制方案和控制算法 ,给出了对一双索斜拉桥模型在随机扰动作用下的振动控制仿真结果。研究结果表明有明显的控制效果 ,同时控制系统对外部能量依赖小 ,稳定性好 。

The vibration control of civil structures such as bridges induced by the external excitation is a new area of research, and also an important way to improve the safety and durability of the structure. The methods of control of cable stayed bridge’s transverse vibration with semi active tendon made up of Magneto Rheological damper and stayed cable were proposed, and the practicability, practical controlling scheme and its controlling algorithm were discussed. Simultaneously the simulation results of bridges vibration excited by the random excitation are presented, and it showed that the semi active control method for cable stayed bridge’s transverse vibration with semi active tendon composed of Magneto Rheological damper and stayed cable are very effective, low power relied on the practicability.