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Abstract Certain earthquake wave with 10% exceeding probability in the following 50 years of the field is input as vibration wave to conduct the dynamic test firstly. The residual dynamic strain calculation expression is amended based on the test results. According to repeating verifications of a great many groups of test data，it is shown that there is good correlation between the amended expression and test results. Secondly，Through controlling the correlative parameters of power spectrum and envelope function of artificially synthesized seismic histories，earthquake waves with different predominant frequencies and effective times are obtained to control the axial stress of dynamic triaxial test. The effects of predominant frequency and effective time on the residual strain of loess are studied. The study results show that the sample suffering the earthquake acceleration wave with higher predominant frequency and longer effective time indicate larger residual strain under the same dynamic stress. In addition，moisture content and consolidation ratio have greater effect on the residual strain of loess. Under the same dynamic stress，the sample with higher moisture content and suffering higher consolidation ratio would produce more seismic residual strain.
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Received: 15 April 2011
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2011, Vol. 30 
