Considering that vehicle load information is of great significance to bridge design,operation and maintenance.A method of identifying dynamic load based on bridge displacement responses is proposed.The relationship between bridge dynamic displacement response and the dynamic vehicle load is constructed,and the moving load is inverted through Bayesian inference method.A vehicle-bridge coupling model is adopted to verify the method,and the influences of the number of sensors and environmental noise on the identification accuracy are discussed.The results indicate that the dynamic load can be identified when there are at least two displacement sensors on bridge.Besides,the number and location of the sensors show no effect on the identification accuracy.However,the accuracy of dynamic loads can be affected by environmental noise,and the accuracy can be improved by increasing the number of sensors.
关键词
车桥耦合系统/荷载识别/贝叶斯推理/桥梁动位移响应/状态空间法
Key words
vehicle bridge interaction system/load identification/Bayesian inference/bridge displacement responses/state space method
万方数据