Based On The MOGA Static And Dynamic Finite Element Model Updating Method Of Steel Box Continuous Girder Bridge

Build a bridge of accurate finite element model, the analysis results can be truer reflection bridge technique condition, therefore, gradually produced a finite element model updating problems and various modification methods. In this paper, based on MOGA, on the basis of the static and dynamic load test, the finite element model of continuous steel box bridge. The main contents are as follows:(1) A brief introduction to the finite element model updating technology development history and basic concepts of genetic algorithm, and the finite element model system to study the related theories and technical problems in the process of correction;(2) In a typical simply supported steel box girder for example, using the method of zero order and MOGA is applied to the finite element model for example, found that MOGA is modified the result more accurate;(3) To the static and dynamic load test, continuous steel box bridge is a bridge under various operating conditions the inherent frequency and the deflection and strain values, at the same time provide modification process with real values;(4) To establish initial finite element model of continuous steel box bridge, and calculating the static and dynamic characteristics of bridge, the analysis results for the initial value of model modification;(5) Based on multi-objective genetic algorithm of continuous steel box bridge, the static and dynamic finite element model. Result, the target parameter error percentage at 5%, a revised model conforms to the static and dynamic characteristics of bridge.