Undrained bearing capacity factors for ring footings in heterogeneous soil

Lee, Joon Kyu; Jeong, Sangseom; Lee, Sungjune

doi:10.1016/j.compgeo.2016.01.021

Cited by 62 publications

(22 citation statements)

References 24 publications

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“…mechanism in each case is also indicated in the last column of the table. It can be observed that the values of N c from the present study are found to be close and a little bit smaller than the results of Lee et al [8] and Remadna et al [7]. It can be observed that for strip (r i /r o = 1) and circular (r i /r o = 0) footings, the N c values from the present study lie between the corresponding values of the lower and upper bound results of Kumar and Chakraborty [6].…”

Section: Results and Comparisonscontrasting

confidence: 74%

“…It can be observed that for strip (r i /r o = 1) and circular (r i /r o = 0) footings, the N c values from the present study lie between the corresponding values of the lower and upper bound results of Kumar and Chakraborty [6]. For intermediate values of r i /r o , however, the results from the present study, Lee et al [8] and Remadna et al [7] are seen to be greater than the upper bound results of Kumar and Chakraborty [6]. This is attributed to the fact that the analysis of Kumar and Chakraborty [6] is based on the assumption that the value of r h remains always equal to the minor principal stress.…”

Section: Results and Comparisonssupporting

confidence: 68%

“…As compared to the factors N c and N q , the effect of the roughness of the footing has a more predominant effect on the bearing capacity factor N c . Table 1 compares the values of N c obtained from the present study with that presented by (i) Kumar and Chakraborty [6] for smooth and rough footings on the basis of the lower and upper bound finite elements limit analysis in conjunction with linear programming, (ii) Lee et al [8] by using PLAXIS for a rough footing, and (iii) Remadna et al [7] on the basis of FLAC for smooth and rough footings. The values within and outside the parentheses correspond to rough and smooth footing, respectively.…”

Section: Results and Comparisonsmentioning

confidence: 88%

“…Kumar and Chakraborty [6] employed the lower and upper bound finite elements limit analysis for evaluating the bearing capacity factors N c , N q and N c for ring foundations. Recently, under undrained condition, the bearing capacity factor N c was computed by (i) Remadna et al [7] by using FLAC, and (ii) Lee et al [8,9] by using the finite element code PLAXIS.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Bearing capacity computation for a ring foundation using the stress characteristics method

Keshavarz

Kumar

2017

Computers and Geotechnics

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Section: Results and Comparisonscontrasting

confidence: 74%

Section: Results and Comparisonssupporting

confidence: 68%

Section: Results and Comparisonsmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Bearing capacity computation for a ring foundation using the stress characteristics method

Keshavarz

Kumar

2017

Computers and Geotechnics

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“…The ring footing is specified with inner and outer radii R i and R 0 , respectively. In this study, five inner-to-outer radius ratios (R i /R 0 = 0, 0.2, 0.4, 0.6, and 0.8) are investigated, which covers most problems of practical interest [17]. The footing roughness is assumed to be perfectly rough, which does not permit any relative movement at all along the soil-footing interface.…”

Section: Geometry and Parametersmentioning

confidence: 99%

Immediate Settlement of Ring Footings Resting on Inhomogeneous Finite Stratum

Lee

Jeong

2018

Applied Sciences

Self Cite

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This paper describes the immediate settlement of uniformly loaded rough ring footings with any stiffness on an inhomogeneous finite layer overlying a rough rigid base, which is not yet covered in the literature. Numerical solutions for a wide range of geometric and material combinations are obtained by finite element method. The effects of dimensionless parameters related to footing internal opening, compressibility, footing stiffness, finite layer thickness and soil inhomogeneity are examined. Based on the results, design charts are presented in the form of settlement influence factors that can be used to calculate the immediate settlements at the inner and outer points of ring footings.

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Bearing capacity factors of cone‐shaped footing in meshfree

Phuor

Ganz

Trapper

2022

Num Anal Meth Geomechanics

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Unlike the flat base foundations, the determination of the bearing resistance of the cone-shaped footing in finite element analysis (FEA) might not be carried out without considering the interface model. In addition, the simulations of the FEA is hardly achieved with a large system due to the assembly technique. So, the alternative should be considered. Therefore, this paper proposes a new method for computing the 𝑁 𝑐 , 𝑁 𝑞 and 𝑁 𝛾 factors of the bearing capacity of the rough and smooth cone-shaped foundations by combining the skew boundary condition as the interface model incorporated with the viscoplastic strain method-based meshfree obeying the yield equation of the Mohr-Coulomb (MC). Thus, the factors can be determined exclusively and reported to reach a close agreement with the published data; nevertheless, the discrepancies are also provided. The plastic flow of the soil mechanics is discussed thoroughly. In addition, the effects of soil friction angle (𝜙) and cone-shaped angle (𝛽) on the factors are inspected systematically. Accordingly, the conservation of the Terzaghi's superposition assumption is confirmed, and the bearing capacity factor charts can be established for various combinations of 𝜙 = 5 o -45 o and 𝛽 = 30 o -180 o . Therefore, it may conclude that the results produced by these techniques and the techniques themselves may be applied confidently for solving geotechnical problems, especially for computing the bearing resistance of the soil.

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Undrained bearing capacity factors for ring footings in heterogeneous soil

Cited by 62 publications

References 24 publications

Bearing capacity computation for a ring foundation using the stress characteristics method

Bearing capacity computation for a ring foundation using the stress characteristics method

Immediate Settlement of Ring Footings Resting on Inhomogeneous Finite Stratum

Bearing capacity factors of cone‐shaped footing in meshfree

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