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Seismic stability of jointed rock slopes under obliquely incident earthquake waves

  • Jingqi Huang
  • Mi Zhao
  • Chengshun Xu
  • Xiuli Du
  • Liu Jin
  • Xu Zhao
Technical Paper
  • 66 Downloads

Abstract

Seismic stability of slopes has been traditionally analyzed with vertically propagated earthquake waves. However, for rock slopes, the earthquake waves might approach the outcrop still with a evidently oblique direction. To investigate the impact of obliquely incident earthquake excitations, the input method for SV and P waves with arbitrary incident angles is conducted, respectively, by adopting the equivalent nodal force method together with a viscous-spring boundary. Then, the input method is introduced within the framework of ABAQUS software and verified by a numerical example. Both SV and P waves input are considered herein for a 2D jointed rock slope. For the jointed rock mass, the jointed material model in ABAQUS software is employed to simulate its behavior as a continuum. Results of the study show that the earthquake incident angles have significance on the seismic stability of jointed rock slopes. The larger the incident angle, the greater the risk of slope instability. Furthermore, the stability of the jointed rock slopes also is affected by wave types of earthquakes heavily. P waves induce weaker responses and SV waves are shown to be more critical.

Keywords

jointed rock slope seismic stability obliquely incident waves P and SV waves 

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Notes

Acknowledgment

This research was supported by the National Basic Research Program of China (2015CB057902), the Beijing Municipal Natural Science Foundation (8164049), and the Young Foundation of the National Science of China (51608015). This support is gratefully acknowledged. The first author would also like to express his gratitude for the support and assistance by Prof. J-S Lin from the University of Pittsburgh.

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Copyright information

© Institute of Engineering Mechanics, China Earthquake Administration and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Jingqi Huang
    • 1
  • Mi Zhao
    • 2
  • Chengshun Xu
    • 2
  • Xiuli Du
    • 2
  • Liu Jin
    • 2
  • Xu Zhao
    • 2
  1. 1.School of Civil and Environmental EngineeringUniversity of Science and Technology BeijingBeijingChina
  2. 2. Disaster Engineering of Ministry of EducationBeijing University of TechnologyBeijingChina

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