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 journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
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Article number | 04022290 |
Journal / Publication | International Journal of Geomechanics |
Volume | 23 |
Issue number | 2 |
Online published | 22 Nov 2022 |
Publication status | Published - Feb 2023 |
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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.
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 journal › peer-review