Estimation of a continuous girder bridges deflection using acceleration and inclination measurement
The deflection of a bridge is an important physical quantity,which is usually specified in design.The deflection can also be utilized in the estimation of traffic load.However,the measurement is oftentimes not practical.Reference points for displacement sensor are usually not available.While deflection estimation by double-integration of acceleration measurement provides a simple and inexpensive deflection estimation,this approach suffers from large integration errors.In this study,deflection estimation without the integration errors only using accelerometers is experimentally investigated using recently developed high accuracy wireless sensors.The acceleration signals measured by wireless sensors are used to estimate girder inclination.Due to the high accuracy,small inclination of bridge girders due to vehicle passage can be captured.The synchronized sensing capability of the wireless sensors allow for deflection analysis using data obtained by multiple sensor nodes.By combining the inclination and the vertical acceleration through a Kalman filter,the bridge deflection is evaluated.The deflection estimated through the Kalman filtering is compared with the deflection estimated through a double-integration of the vertical acceleration,showing the advantage of the Kalman filter approach.
Kalman filter bridge deflection inclination acceleration
T.Nagayama C.Zhang D.Su S.Lee
Department of Civil Engineering,The University of Tokyo,Tokyko,Japan
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
2140-2148
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）