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Journal of Mountain Science

, Volume 7, Issue 4, pp 353–360 | Cite as

Analysis of the effects of slope geometry on the dynamic response of a near-field mountain from the Wenchuan Earthquake

  • Shiguo XiaoEmail author
  • Wenkai Feng
  • Jianjing Zhang
Article

Abstract

Fourier spectra and acceleration response spectra of near-field acceleration records of the 2008 Wenchuan Earthquake have been calculated. Relative fundamental frequencies (or predominant periods) were characterized. Then, the natural frequencies of a range of slopes with different geometric characteristics, such as height, slope ratio, and pattern, were analyzed. The seismic responses of the slopes were compared, and the variability of seismic response with the above geometric elements was found. Results show that if slope height increases, and provided that other conditions are unchanged, the natural frequency of the first mode of a double-surface slope will change as a power law. However, natural frequencies will diminish (based on a parabolic function) as the slope angle becomes large. Both the surface pattern and the number of surfaces on a slope can have a great impact on the seismic response of the slope. Moreover, within a certain range of slope heights or angles, either height or angle will also greatly influence the variability of the seismic response. The results of this research will be helpful to understanding seismic dynamic response features and explaining the ways that slope stability can be affected by earthquakes

Keywords

Wenchuan Earthquake Slope Geometric features Dynamic response Natural frequency 

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References

  1. Ambraseys N. N. and Menu J. M. 1988. Earthquake-Induced Ground Displacements. Journal of Earthquake Engineering 16: 985–1006.Google Scholar
  2. Bray J. D. and Travasarou T. 2007. Simplified Procedure for Estimating Earthquake-induced Deviatoric Slope Displacements. Journal of Geotechnical and Geoenvironmental Engineering 133(4): 381–392.CrossRefGoogle Scholar
  3. Bray J. D. and Travasarou T. 2009. Pseudostatic Coefficient for Use in Simplified Seismic Slope Stability Evaluation. Journal of Geotechnical and Geoenvironmental Engineering 135(9): 1336–1340.CrossRefGoogle Scholar
  4. Houston S. L., Houston W. N. and Padilla J. M. 1987. Microcomputer-aided Evaluation of Earthquake-induced Permanent Slope Deformations. Microcomputer of Civil Engineering 2(3): 207–222.CrossRefGoogle Scholar
  5. Kramer S. L. and Smith M. W. 1997. Modified Newmark Model for Seismic Displacements of Compliant Slopes. Journal of Geotechnical and Geoenvironmental Engineering 123(7): 635–644.CrossRefGoogle Scholar
  6. Lin J. S. and Whitman R. 1986. Earthquake Induced Displacements of Sliding Blocks. Journal of Geotechnical. Engineering 112(1): 44–59.CrossRefGoogle Scholar
  7. Rodriguez-Marek A., Bray J. D. and Abrahamson N. 2001. An Empirical Geotechnical Seismic Site Response Procedure. Earthquake Spectra 171: 65–87.CrossRefGoogle Scholar
  8. Sarma S. K. 1975. Seismic Stability of Earth Dams and Embankments. Geotechnique 25(4): 743–761.CrossRefGoogle Scholar
  9. Wartman J., Bray J. D. and Seed R. B. 2003. Inclined Plane Studies of the Newmark Sliding Block Procedure. Journal of Geotechnical and Geoenvironmental Engineering 129(8): 673–684.CrossRefGoogle Scholar

Copyright information

© Science Press, Institute of Mountain Hazards and Environment, CAS and Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  1. 1.Department of Geotechnical EngineeringSouthwest Jiaotong UniversityChengduChina
  2. 2.State Key Laboratory of Geohazard Prevention and Geoenvironment ProtectionChengdu University of TechnologyChengduChina
  3. 3.Department of Geotechnical EngineeringSouthwest Jiaotong UniversityChengduChina

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