加载频率对反滤料动变形特性影响的试验及细观数值模拟研究

›› 2011, Vol. 32 ›› Issue (S1): 419-0423.

• Fundamental Theroy and Experimental Research • Previous Articles Next Articles

Study of test and mesomechanical simulation of influence of vibration frequency on dynamic deformation property of inverted filler

YANG Gui^{1, 2}, LIU Han-long^{1, 2}, GAO De-qing^{1, 2}

1. Key Laboratory for Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China； 2. Engineering Safety and Disaster Prevention Institute , Hohai University, Nanjing 21098, China

Received:2010-07-28 Online:2011-05-15 Published:2011-05-16

Abstract

Abstract: The influence of loading frequency on dynamic modulus and damping ratio has been inconclusive in dynamic triaxial test. Therefore PFC2D is adopted to simulate dynamic triaxial test of the inverted filler of earth-rockfill dam in different vibration frequencies. The simulated results have tallied in general with those of the test, which shows the influence of frequency on dynamic modulus and damping ratio can be ignored when the frequency is not higher than 0.1 Hz; and that the modulus will decrease in small strain but it will begin to converge as the strain become larger when the frequency is lower than 0.1 Hz. Though the damping ratio has a little fluctuated at 0.05 Hz, it is still in a narrow range when compared with that in other frequencies; so it can be believed that the influence can be ignored.

Key words: inverted filler, vibration frequency, dynamic modulus and damping ratio, mesomechanical simulation

CLC Number:

TU 443

YANG Gui , LIU Han-long , GAO De-qing. Study of test and mesomechanical simulation of influence of vibration frequency on dynamic deformation property of inverted filler[J]., 2011, 32(S1): 419-0423.

References

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