The curved girder bridge control based on sequential optimal control with two-directional horizontal earthquake

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (10) : 6-11.

1. Western Engineering Research Center of Disaster Mitigation in Civil Engineering， Lanzhou Univ. of Tech.， Lanzhou　730050，China；#br# 2. Institute of Earthquake Protection and Disaster Mitigation，Lanzhou Univ. of Tech.，Lanzhou　730050，

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Abstract

According to translation torsion coupling phenomenon of the curved girder bridge will cause adverse effects on the structure under earthquake action, the seismic isolation technique and additional damping device is combined to control the translation torsion coupling of curved girder bridges. This paper established the equation of motion considering effect of the curved girder bridge eccentric under two-directional horizontal earthquake, and used sequential optimal control and classical linear optimal control to analysis. The results indicate that the optimal control sequence method can more effectively reduce the seismic response of curved beam bridge under two-directional earthquake action than classical linear optimal control and reduce the effect of torsion. This paper will be practical engineering better value for reduce girder falling earthquake damage to ensure the curved girder bridge seismic safety.

Key words

curved bridges / two-directional horizontal earthquake / sequential optimal control

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LI Xi-mei1,2，DU Yong-feng1,2. The curved girder bridge control based on sequential optimal control with two-directional horizontal earthquake[J]. Journal of Vibration and Shock, 2015, 34(10): 6-11

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