Research on semi-active control of long and large-span continuous beam bridge vibration reduction considering system fault tolerance

Abstract

In order to reduce the seismic response of long and large-span continuous beam bridge, this paper carried out a study on vibration reduction control of long and large-span continuous beam bridge, and magnetorheological dampers are used to provide control force for the control scheme. Based on the LQR classic optimal active control algorithm, a semi-active control algorithm considering system fault tolerance is proposed. When some dampers fail, the fault-tolerant control algorithm provides compensation output to the control system, so that the control system can still maintain the expected control effect. The actual engineering example of a long and large-span continuous beam bridge is selected, and a finite element analysis program is written. The semi-active vibration reduction control of the long-span continuous beam bridge is calculated and analyzed in various combinations of working conditions. The calculation results show that the method in this paper has achieved good results in controlling the seismic response of the bridge structure.