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Journal of Central South University of Technology

, Volume 14, Issue 6, pp 842–847 | Cite as

Influences of nonassociated flow rules on seismic bearing capacity factors of strip footing on soil slope by energy dissipation method

  • Yang Xiao-li  (杨小礼)Email author
  • Guo Nai-zheng  (郭乃正)
  • Zhao Lian-heng  (赵炼恒)
  • Zou Jin-feng  (邹金锋)
Article

Abstract

Seismic bearing capacity factors of a strip footing placed on soil slope were determined with both associated and nonassociated flow rules. Quasi-static representation of earthquake effects using a seismic coefficient concept was adopted for seismic bearing capacity calculations. A multi-wedge translational failure mechanism was used to obtain the seismic bearing capacity factors for different seismic coefficients and various inclined angles. Employing the associated flow rule, numerical results were compared with the published solutions. For bearing capacity factors related to cohesion and equivalent surcharge load, the maximum difference approximates 0.1%. However, the difference of bearing capacity factor related to unit weight is larger. With the two flow rules, the seismic bearing capacity factors were presented in the form of design charts for practical use. The results show that seismic bearing capacity factors related to the cohesion, the equivalent surcharge load and the unit weight increase greatly as the dilatancy angle increases, and that the nonassociated flow rule has important influences on the seismic bearing capacity.

Key words

nonassociated flow rule seismic bearing capacity factor earthquake 

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Copyright information

© Published by: Central South University Press, Sole distributor outside Mainland China: Springer 2007

Authors and Affiliations

  • Yang Xiao-li  (杨小礼)
    • 1
    Email author
  • Guo Nai-zheng  (郭乃正)
    • 1
  • Zhao Lian-heng  (赵炼恒)
    • 1
  • Zou Jin-feng  (邹金锋)
    • 1
  1. 1.School of Civil and Architectural EngineeringCentral South UniversityChangshaChina

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