A Study on Noise-Resistant Identification Method For Bridge Flexural Rigidity Based On Ambient Vibration Test

In this paper,a leastsquare solutions with finite power indirect adjustment method of bridge flexural rigidity identification method(γLSE method)is developed on basis of ambient vibration test.It is used to make numerical simulation identification on the flexural rigidity of threespan variablesection continuous box girder bridge— Guangzhou great bridge with the main span of 110m.Field dynamic and static load test for bridge has also been done to verify the identification result.The analyzed result shows this method can produce perfect noiseproof effect for both accidental error of module vibration mode and serious hackle test error.The error of rigidity identification result could be lowered down by about 90% compared with the common leastsquare solutions.The identification precision shall be greatly improved.