Seismic analysis of footings is of great importance for the footings situated on slopes. The seismic bearing capacity which is lower than the bearing capacity in the static case is further lowered by the presence of slopes. The previous studies in the area of seismic bearing capacity of footings embedded in slopes have been done using the pseudo-static approach. The present study attempts to study the bearing capacity of footings embedded in slopes using a pseudo-dynamic approach which accounts for the time-dependent nature of the earthquake. The effect of soil friction angle, embedment depth of the foundation, seismic acceleration, and slope angle on the seismic bearing capacity factor has been studied. The results of this study are compared with the few pseudo-static results available in the literature. It has been observed that the pseudo-dynamic approach gives lower values of seismic bearing capacity factor when compared to the pseudo-static approach.

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Seismic Analysis of Footings Embedded in Slopes Considering Composite Failure Surface: Pseudo-dynamic Approach

  • Anagha Mary Paul,
  • Sreevalsa Kolathayar,
  • Katta Venkataramana

摘要

Seismic analysis of footings is of great importance for the footings situated on slopes. The seismic bearing capacity which is lower than the bearing capacity in the static case is further lowered by the presence of slopes. The previous studies in the area of seismic bearing capacity of footings embedded in slopes have been done using the pseudo-static approach. The present study attempts to study the bearing capacity of footings embedded in slopes using a pseudo-dynamic approach which accounts for the time-dependent nature of the earthquake. The effect of soil friction angle, embedment depth of the foundation, seismic acceleration, and slope angle on the seismic bearing capacity factor has been studied. The results of this study are compared with the few pseudo-static results available in the literature. It has been observed that the pseudo-dynamic approach gives lower values of seismic bearing capacity factor when compared to the pseudo-static approach.