Research on Deflection Prediction Model of Composite Beams with Large Temperature Difference Based on Discrete Grey Optimization Model
In order to quantitatively characterize the deflection variation law of key construction procedures of composite beam bridge under large temperature difference and strong wind environment,taking the first composite beam bridge in Bostam,Mulei,Xinjiang as the research object and considering the influence of environmental factors,this paper analyzes the variation law of beam displacement before and after the hoisting of composite beam.At the same time,based on the finite element theoretical model and the measured value,two kinds of grey prediction models GM(1,1)and OMGM(1,1)are established,and their residual,correlation and posterior error accuracy are tested.The results show that the two models have high accuracy and both meet the displacement of composite beam bridge.Compared with GM(1,1)model,OMGM(1,1)model has higher accuracy.It is recommended to use the OMGM(1,1)model as a deflection control analysis and verification formula for key bridge construction processes to improve prediction accuracy.
large temperature differencestrong wind environmentdeflectionGM(1,1)OMGM(1,1)
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