Numerical Analysis of Square and Circular Skirted Footings Placed on Sand using PLAXIS 3D Software

Juneja, Gaurav; Sharma, Ravi Kumar

doi:10.22044/jme.2022.12458.2261

Document Type : Original Research Paper

Authors

Gaurav Juneja ¹
Ravi Kumar Sharma ²

¹ National Institute of technology Hamirpur, Himachal Pradesh, India

² Department of Civil Engineering, National Institute of Technology, Hamirpur, Himachal Pradesh, India

https://doi.org/10.22044/jme.2022.12458.2261

Abstract

This paper presents the numerical analysis of square and circular skirted footings placed on different sands using the PLAXIS 3D software. The numerical analysis is done using the Mohr-coulomb (M-C) yield criteria. The size of the footings is considered as 100 mm for both the square and circular footings. The three different friction angles (Ø) of sand 36^˚, 40^˚, and 42^˚ are used to study the effect of sand compactness. The depth of the skirt (h) varies from 0B to 2B (B is the width of the footing). The surface roughness between skirt-sand and footing-sand is considered partially rough and completely rough. The interface friction factor (δ) for a partially rough and fully rough interface is taken as 2/3Ø and Ø. All the tests are conducted by applying a prescribed displacement (s/B) of 20% of the footing size. The results obtained from the present work reveal that the inclusion of structural skirts with the footings appreciably increases the bearing capacity and reduces the settlement of the footing by increasing the skirt depth. The results obtained show that the skirted footing is found to be more effective in loose sand compared to dense sand in increasing the bearing capacity. The numerical analysis results are also verified with the experimental results available in the literature and multiple regression model. This work shows that the prediction of the accuracy of the results is quite good with the experimental results and the generated regression model.

Keywords

20.1001.1.22518592.2022.13.4.9.7

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Journal of Mining and Environment

Numerical Analysis of Square and Circular Skirted Footings Placed on Sand using PLAXIS 3D Software

References

References

Volume 13, Issue 4
October 2022
Pages 1049-1066

Numerical Analysis of Square and Circular Skirted Footings Placed on Sand using PLAXIS 3D Software

References

References

Volume 13, Issue 4October 2022Pages 1049-1066

Volume 13, Issue 4
October 2022
Pages 1049-1066