Impact of Transient Infiltration on the Ultimate Bearing Capacity of Obliquely and Eccentrically Loaded Strip Footings on Partially Saturated Soils

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Hessam Fathipour
  • Shahla Bahmani Tajani
  • Meghdad Payan
  • Reza Jamshidi Chenari
  • Kostas Senetakis

Detail(s)

Original languageEnglish
Article number04022290
Journal / PublicationInternational Journal of Geomechanics
Volume23
Issue number2
Online published22 Nov 2022
Publication statusPublished - Feb 2023

Abstract

Soils above the groundwater table and near the ground surface are often partially saturated, and the changes in the degree of saturation and matric suction caused by infiltration may have substantial effects on the stability of geotechnical systems. This work evaluates the significant effect of transient flow on the ultimate bearing capacity of strip footings founded on unsaturated soils under the simultaneous actions of vertical and horizontal loads and moment using the lower-bound theorems of the finite-element limit analysis and the incorporation of second-order cone programming. The unified effective stress theory is incorporated into the soil yield function to model the partially saturated state, and the closed-form solution for one-dimensional transient flow is adopted so as to evaluate the tempo-spatial variations of suction stress. For both sand and clay underlying soils, it is found that the increase of infiltration time leads to a notable decrease of the size of the normalized failure envelopes for either obliquely or eccentrically loaded shallow foundations. The impact of transient flow on the ultimate bearing capacity of surface footings is also observed to be greater for clay soils as compared with sand deposits due to the significant contribution of higher induced suction stress.

Research Area(s)

  • Bearing capacity, Combined loading, Finite-element limit analysis (FELA), Lower bound, Second-order cone programming (SOCP), Transient flow, Unsaturated soil

Citation Format(s)

Impact of Transient Infiltration on the Ultimate Bearing Capacity of Obliquely and Eccentrically Loaded Strip Footings on Partially Saturated Soils. / Fathipour, Hessam; Tajani, Shahla Bahmani; Payan, Meghdad et al.
In: International Journal of Geomechanics, Vol. 23, No. 2, 04022290, 02.2023.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review