To control longitudinal girder displacement of suspension bridges,a displacement optimal control method was proposed by combining viscous dampers with bearings.Firstly,the components of monitored dis-placement data were analyzed by the empirical wavelet transform(EWT)method.Then,a dynamic model of a suspension bridge was developed and verified by the monitored data.Finally,the effects of viscous dampers and bearings on the longitudinal girder displacement of the suspension bridge were analyzed.The response sur-face method(RSM)was utilized to optimize the combination parameters.The results show that the dynamic components caused by vehicles account for 94.5％of the cumulative value of the longitudinal girder displace-ment.The viscous dampers and the horizontal forces of the bearings have different influence ranges.Larger damping coefficients or smaller damping exponents contribute to smaller cumulative values.The bearing horizon-tal force has a limited influence range.Optimizing the combination parameters of the viscous dampers and bear-ings can reduce the cumulative displacement by 38％and improve the service life of girder constraint devices.
suspension bridgelongitudinal displacementfinite element modeldisplacement controlvis-cous damperbearing
维普
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