Seismic Bearing Capacity of a Rigid Footing Adjacent to a Cohesionless Slope

ABSTRACT At present, analytical or empirical formula for seismic bearing capacity of footings adjacent to slopes is not available. This study uses a pseudo-static-based approach in conjunction with rigorous Janbu's slice method to derive analytical values of seismic bearing capacity factors (Nγ) and correction factors for the effects of inertia of soil mass and load inclinations for a rigid footing adjacent to cohesionless slopes. It is shown that both the bearing capacity factors (Nγ) and the correction factors for the seismic bearing capacity of footings placed on level ground derived herein are comparable with those reported in the literature. Empirical equations regarding the effects of slope angles and load inclinations, expressed using generalized forms of those proposed in the literature, are also derived. It is also found that the empirical equations derived in the present study provide values of correction factors in good agreements with the analytical ones, indicating the validity of using these empirical equations for assessing the bearing capacity of rigid footings situated on the slope subjected to pseudo-static seismic loading.

[1]  Osamu Kusakabe,et al.  BEARING CAPACITY OF SLOPES UNDER STRIP LOADS ON THE TOP SURFACES , 1981 .

[2]  Ching-Chuan Huang.  Seismic Displacements of Soil Retaining Walls Situated on Slope , 2005 .

[3]  M. Shahien,et al.  Discussion of "Seismic Bearing Capacity and Settlements of Foundations" , 1994 .

[4]  Wai-Fah Chen,et al.  Seismic Bearing Capacity of a Mounded Foundation near a Down-Hill Slope by Pseudo-Static Analysis. , 1994 .

[5]  Hiroshi Kawakami,et al.  ON THE BEARING CAPACITY OF A SLOPE OF COHESIONLESS SOIL , 1960 .

[6]  D. G. Elms,et al.  Seismic bearing capacity and settlements of foundations , 1993 .

[7]  Aleksandar S. Vesic,et al.  Analysis of Ultimate Loads of Shallow Foundations , 1973 .

[8]  Takeshi Sato,et al.  Shaking and Tilt Table Tests of Geosynthetic-Reinforced Soil and Conventional-Type Retaining Walls , 1998 .

[9]  Wai-Fah Chen,et al.  BEARING CAPACITY DETERMINATION BY LIMIT ANALYSIS , 1973 .

[10]  Kenneth L. Fishman,et al.  Threshold Accelerations for Rotation or Sliding of Bridge Abutments , 1996 .

[11]  K. Terzaghi.  Theoretical Soil Mechanics , 1943 .

[12]  N. Newmark.  Effects of Earthquakes on Dams and Embankments , 1965 .

[13]  Kunitomo Narita,et al.  Analysis of bearing capacity for log-spiral sliding surfaces , 1989 .

[14]  S. K. Sarma,et al.  SEISMIC BEARING CAPACITY FACTORS OF SHALLOW STRIP FOOTINGS , 1990 .

[15]  edited by Hans F. Winterkorn Hsai-Yang Fang.  Foundation Engineering Handbook , 2017 .

[16]  Ching-Chuan Huang,et al.  Stability analysis for footings on reinforced sand slopes , 1994 .

[17]  Alain Pecker,et al.  SEISMIC BEARING CAPACITY OF FOUNDATION ON COHESIONLESS SOIL. DISCUSSION , 1995 .

[18]  George Geoffrey Meyerhof,et al.  Some recent research on the bearing capacity of foundations , 1963 .

[19]  太郎 内村.  Seismic Stability Against High Seismic Loads of Geosynthetic-Reinforced Soil Retaining Structures , 1998 .

[20]  James Graham,et al.  Stress characteristics for shallow footings in cohesionless slopes , 1988 .

[21]  H Ochiai,et al.  Analyses of a near-fault geosynthetic-reinforced modular block wall damaged during the 1999 Chi-Chi earthquake , 2001 .

[22]  Ching-Chuan Huang,et al.  SEISMIC STABILITY OF SOIL RETAINING WALLS SITUATED ON SLOPE , 2004 .

[23]  Abdul-Hamid Soubra,et al.  Upper-Bound Solutions for Bearing Capacity of Foundations , 1999 .