Research On Operation Performance Evaluation Indexes Of Three Span Continuous Beam Of High Speed Railway

With the rapid development of high speed railway,testing and evaluation work of operation performance of high speed railway bridge is very important in order to ensure the safe and smooth operation of trains running on the bridge.At present the main standard using in testing and evaluation of high speed railway is "Verification Regulation for Operation Performance of High Speed Railway Bridge(Trial)".And the standard is applied in 2014.At that time the number of statistical samples which make the ordinary value in the standard is limited.The evaluation indexes of continuous beam is limited to common span continuous beam.In order to perfect the ordinary value,this paper increases the number of statistical sample of three span continuous beam and expands the span to 154m.Also this paper gives the regression prediction value of vertical natural frequency,lateral natural frequency,ratio of deflection to span and vertical rotation angle at girder end by regression analysis method,gives the maximum inferential value of vertical and lateral amplitude by statistical method,gives the enveloping of vertical vibration acceleration and vertical damping ratio by envelope method.Then this paper has compared and analyzed the regression prediction value,the maximum inferential value,the enveloping and the ordinary value from the standard of"Verification Regulation for Operation Performance of High Speed Railway Bridge(Trial)".Finally this paper gives the proposed ordinary value about operation performance evaluation indexes of three span continuous beam with the span from 32m to 154m.