scholarly journals The bearing capacity factor N γ of strip footings on c–ϕ–γ soil using the method of characteristics

SpringerPlus ◽  
2016 ◽  
Vol 5 (1) ◽  
Author(s):  
Dongdong Han ◽  
Xinyu Xie ◽  
Lingwei Zheng ◽  
Li Huang
Keyword(s):  
Bearing Capacity ◽  
Method Of Characteristics ◽  
Capacity Factor ◽  
The Method Of Characteristics ◽  
Strip Footings ◽  
Bearing Capacity Factor

Bearing capacity factor Nγ for ring footings using the method of characteristics

2005 ◽  
Vol 42 (5) ◽  
pp. 1474-1484 ◽  
Author(s):  
Jyant Kumar ◽  
Priyanka Ghosh
Keyword(s):  
Bearing Capacity ◽  
Method Of Characteristics ◽  
Friction Angle ◽  
Outer Edge ◽  
Capacity Factor ◽  
The Method Of Characteristics ◽  
Axis Of Symmetry ◽  
Bearing Capacity Factor

The bearing capacity factor Nγ was determined for both smooth and rough ring footings using the method of stress characteristics. The analysis was based on the assumption that for a rough footing the friction angle (δ) between the footing base and underlying cohesionless material increases gradually from zero along the axis of symmetry to ϕ along the outer edge of the footing. The value of Nγ was found to decrease significantly with an increase in ri /ro, where ri and ro are the inner and outer radii of the ring, respectively. For larger values of ϕ, the magnitude of Nγ for a rough footing was seen to be significantly higher than that for a smooth footing. The obtained results were compared with those available in the literature.Key words: bearing capacity, failure, foundations, method of characteristics, plasticity.

Nγ for rough strip footing using the method of characteristics

2003 ◽  
Vol 40 (3) ◽  
pp. 669-674 ◽  
Author(s):  
Jyant Kumar
Keyword(s):  
Numerical Modeling ◽  
Bearing Capacity ◽  
Method Of Characteristics ◽  
Vertical Axis ◽  
Strip Footing ◽  
Slip Lines ◽  
The Method Of Characteristics ◽  
Foundation Base ◽  
Axis Of Symmetry ◽  
Bearing Capacity Factor

By using the method of characteristics, the bearing capacity factor Nγ was computed for a rough strip footing. The analysis was performed by considering a curved nonplastic wedge under the foundation base bounded by curved slip lines being tangential to the base of the footing at its either edge and inclined at an angle π/4 - ϕ/2 with the vertical axis of symmetry. The existing theories in the literature for rough footings, which usually employ a triangular wedge below the footing base, were generally found to provide greater values of Nγ as compared with the results obtained in this contribution.Key words: bearing capacity, foundations, failure, numerical modeling, plasticity.

scholarly journals Model experiments to assess effect of cavities on bearing capacity of two interfering superficial foundations resting on granular soil

2020 ◽  
Vol 42 (3) ◽  
pp. 222-231
Author(s):  
Djamel Saadi ◽  
Khelifa Abbeche ◽  
Rafik Boufarh
Keyword(s):  
Bearing Capacity ◽  
Experimental Approach ◽  
Efficiency Factor ◽  
Capacity Factor ◽  
Granular Soil ◽  
Test Model ◽  
Experimental Protocol ◽  
Model Experiments ◽  
Strip Footings ◽  
Bearing Capacity Factor

AbstractThe objective of this paper is to describe the effect of cavities on the bearing capacity of two interfering footings based on granular soil using an exclusively experimental approach with a test model designed in the laboratory. The experimental protocol was carried out based on the variation of several parameters such as the spacing (x) (axis to axis) between the footings, and the distance (H) between the footings and cavities and between the cavities axes (L). The results highlight the effect of cavities and the interference of two strip footings on the bearing capacity factor (q) and efficiency factor (EF). Moreover, the results revealed that, in the case wherein the distance between the footings and the cavity is greater than 3, the cavity impact is eliminated.

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