Seismic Bearing Capacity of Strip Footing on Excavations Considering Soil Strength Anisotropy Using Modified Pseudo‐Dynamic and Pseudo‐Static Approaches

ABSTRACT Although considerable research has explored the static and seismic bearing capacity of strip footings on slopes or excavations, the influence of clay strength anisotropy on the bearing capacity of strip footing near excavations, specifically considering pseudo‐dynamic conditions, remains un...

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Published in:International journal for numerical and analytical methods in geomechanics 2025-01, Vol.49 (1), p.151-165
Main Authors: Shirazizadeh, Shabnam, Keshavarz, Amin, Beygi, Majid, Saberian, Mohammad, Li, Jie, Vali, Ramin
Format: Article
Language:English
Subjects:
Acceleration
Anisotropic soils
Anisotropy
Bearing capacity
Clay
Dimensionless analysis
Dredging
Excavation
Finite element method
Footings
Heterogeneity
Impact analysis
Limit analysis
non‐homogenous
Parameter modification
pseudo‐dynamic
pseudo‐static
Shear
Soil
Soil bearing capacity
Soil investigations
Soil strength
Strip
strip footing
Wavelength
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Summary:ABSTRACT Although considerable research has explored the static and seismic bearing capacity of strip footings on slopes or excavations, the influence of clay strength anisotropy on the bearing capacity of strip footing near excavations, specifically considering pseudo‐dynamic conditions, remains unexplored. This study used the finite element limit analysis (FELA) method to evaluate the impact of clay strength anisotropy on the seismic bearing capacity of strip footings. The effects of various dimensionless parameters on the bearing capacity were examined, which include shear wavelength, the setback distance ratio, vertical height ratio, soil strength ratio, soil strength heterogeneity, anisotropic ratio, and horizontal and vertical acceleration coefficients. Design charts were developed to compute the seismic bearing capacity of strip footings on nonhomogeneous and anisotropic excavations under pseudo‐static conditions. Furthermore, the effects of vertical acceleration coefficients and shear wavelength on the seismic bearing capacity of strip footing near excavation in nonhomogeneous and anisotropic soils were investigated.
ISSN:0363-9061
1096-9853
DOI:10.1002/nag.3864