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Drained Bearing Capacity of Skirted Circular and Ring Footings with Varying Depths of Skirts

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Abstract

In the present study, the drained bearing capacity factors N’c, N’q and N’γ for rough base circular and ring footings with and without skirts are determined by using the finite element limit analysis (FELA) method. These footings are provided with skirts to increase the bearing capacity and reduce the settlements. The Mohr–Coulomb model and the associative flow rule are used in the analyses. The friction angle of the soil is varied from ϕ = 0° to 40° with an increment of 5°. The depth of the skirt (D) is varied from 0.5 to 2.0 times the width of footing (B), i.e., D = 0.5B to 2.0B. The evaluated bearing capacity factors are used for the typical assessment of superposition by considering cohesion, surcharge, and unit weight as three separate components and together. The FELA results are compared with those available in the literature which are in good agreement. The typical failure planes are evaluated from the study, which provides the failure mechanism of circular and ring footings with and without skirts. The FELA results are presented in the form of design charts and tables for practical use. The artificial neural network-multilayer perceptron (ANN-MLP) model has been employed to predict bearing capacity factors and demonstrate the importance of input parameters in each case.

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Authors and Affiliations

  1. Department of Applied Mechanics, The Maharaja Sayajirao University of Baroda, Vadodara, India

    Brijesh Akabari & Nitinkumar H. Joshi

  2. Department of Civil Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, India

    Jitesh T. Chavda

  3. Research Unit in Sciences and Innovative Technologies for Civil Engineering Infrastructures, Department of Civil Engineering, Thammasat School of Engineering, Thammasat University, Pathum Thani, 12120, Thailand

    Wittaya Jitchaijaroen & Suraparb Keawsawasvong

Authors
  1. Brijesh Akabari
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  2. Jitesh T. Chavda
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  3. Wittaya Jitchaijaroen
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  4. Suraparb Keawsawasvong
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  5. Nitinkumar H. Joshi
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Correspondence to Jitesh T. Chavda.

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Appendix

Appendix

Tables A1, A2, A3, A4, A5, A6, A7, A8, A9, A10

Table A1 Bearing capacity factors of circular footing (ri/ro = 0) for different skirts depth ratio (D/B = 0, 0.5, 1.0, 1.5, 2.0) and ϕ = 0°- 40°
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Table A2 Bearing capacity factor N’c for outer-skirted ring footing for different skirts depth ratio (D/B = 0, 0.5, 1.0, 1.5, 2.0)
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Table A3 Bearing capacity factor N’c for inner-skirted ring footing for different skirts depth ratio (D/B = 0, 0.5, 1.0, 1.5, 2.0)
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Table A4 Bearing capacity factor N’c for double-skirted ring footing for different skirts depth ratio (D/B = 0, 0.5, 1.0, 1.5, 2.0)
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Table A5 Bearing capacity factor N'q for outer-skirted ring footing for different skirts depth ratio (D/B = 0, 0.5, 1.0, 1.5, 2.0)
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Table A6 Bearing capacity factor N'q for inner-skirted ring footing for different skirts depth ratio (D/B = 0, 0.5, 1.0, 1.5, 2.0)
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Table A7 Bearing capacity factor N'q for double-skirted ring footing for different skirts depth ratio (D/B = 0, 0.5, 1.0, 1.5, 2.0)
Full size table
Table A8 Bearing capacity factor N'γ for outer-skirted ring footing for different skirts depth ratio (D/B = 0, 0.5, 1.0, 1.5, 2.0)
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Table A9 Bearing capacity factor N'γ for inner-skirted ring footing for different skirts depth ratio (D/B = 0, 0.5, 1.0, 1.5, 2.0)
Full size table
Table A10 Bearing capacity factor N'γ for double-skirted ring footing for different skirts depth ratio (D/B = 0, 0.5, 1.0, 1.5, 2.0)
Full size table

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Akabari, B., Chavda, J.T., Jitchaijaroen, W. et al. Drained Bearing Capacity of Skirted Circular and Ring Footings with Varying Depths of Skirts. Transp. Infrastruct. Geotech. (2024). https://doi.org/10.1007/s40515-024-00395-6

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  • DOI: https://doi.org/10.1007/s40515-024-00395-6

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