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中文摘要：
理论研究与震害经验表明，地震时曲线桥梁会产生弯扭耦合振动。为了减少弯扭耦合的地震反应，提出了利用压电摩擦阻尼器进行曲线桥梁地震反应半主动控制的方法，建立曲线桥梁空间有限元模型，在桥台支座部位设置半主动控制阻尼器，在不同地震波入射角情况下分析了半主动控制算法的减震效果。结果表明，半主动控制界限Hrovat最优控制算法能有效地减小曲线桥梁地震反应，其控制效果优于简单Bang—bang控制算法，而始终提供最大阻尼力的被动控制方法会增大桥梁地震反应，并不是被动控制阻尼力越大越好。
英文摘要：
Theoretical research and earthquake damage investigation indicate that there is bend torsion coupling vibration for curved bridge when earthquake occurs. To reduce the bend torsion coupling seismic response, the approach of semi-active control of seismic response for curved bridge is presented using piezoelectric friction dampers. The space finite element model for curved bridge is established. Semi-active dampers are set at the bearing positions of bents. The decreasing amplitude effect of semi-active control algorithm is analyzed with different earthquake wave incident angles. The analysis results indicate that the semi-active limit Hrovat control algorithm can reduce seismic responses of the curved bridge effectively, and it is superior to the simple bang-bang control algorithm. The passive control method providing the most damper all the time can increase seismic response of the bridge, and it is unlikely to get better effect by greater damping force in passive control.
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