Calculation of Transverse Load Distribution Coefficient of Prefabricated T-beam Bridge Based on Model Modification Theory
In order to calculate the lateral distribution coefficient of load in the case of damage to the main beam of a prefabricated T-beam bridge,based on the rigid beam method,the bending stiffness damage reduction coefficient of the main beam is selected as the parameter to be corrected.Then,an objective function is constructed using measured and theoretical deflection values,and multi-objective optimization is carried out using the combination of L-M method and G-N method to obtain the corrected lateral distribution coefficient of load.In order to verify the accuracy of the calculation method,load tests were conducted on a prefabricated T-beam bridge that has been in service for 18 years.The results show that the calculated deflection value after model correction has a small error compared with the measured value,and the transverse distribution coefficient of the main beam load after model correction is in good agreement with the measured value,with a maximum error of only 3.9%.
bridge engineeringprefabricated bridgestransverse load distribution coefficientrigid transverse beam methodmodel updating theory
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