Accurate Correlation Modeling between Wind Speed and Bridge Girder Displacement Based on a Multi-Rate Fusion Method

Accurate Correlation Modeling between Wind Speed and Bridge Girder Displacement Based on a Multi-Rate Fusion Method

Blog Article

Wind action is one of the environmental actions that has significant static and dynamic effects on long-span bridges.The lateral wind speed is the main factor affecting the lateral displacement of the main girder of the bridge.The main objective of the paper is to Polystyrene - Flame Retardant use the improved multi-rate fusion method to correct the monitoring data so that accurate correlation modeling of wind speed-displacement can be achieved.Two Kalman gain coefficients are introduced to improve the traditional multi-rate fusion method.

The fusion method is verified by the results of simulated data analysis in time domain and frequency domain.Then, the improved multi-rate fusion method is used to fuse the monitoring lateral displacement and acceleration data of a bridge under strong wind action.The corrected lateral wind speed and displacement data is further applied to establish the correlation model through the linear regression.The improved multi-rate fusion method can overcome the inaccuracy of the high frequency stage of a Global Positioning System (GPS) sensor and the low frequency stage of acceleration sensor.

The correlation coefficient of wind speed-displacement after fusion increases and the confidence interval width of regression model decreases, which indicates Voltmeters that the accuracy of the correlation model between wind speed and displacement is improved.