Evaluation of Load Capacity of Stratified Soils (2 Layers) by Means of Numerical Analytical Comparison

Main Article Content

Autores

Jairo Alejandro Quintero-Chamorro https://orcid.org/0000-0003-1365-7629
Brayan Julián Martínez-Ortega https://orcid.org/0000-0002-2221-8444
Lucio Gerardo Cruz-Velasco, Ph. D. https://orcid.org/0000-0003-2438-5526

Abstract

The methods for determining load capacity in stratified soils are numerous and differ in their methods and results. These differences in analysis lead to uncertainty in engineering practices or over-dimensioning of the foundation solution. This study seeks to determine three analytical methods of load capacity in stratified soils (2 layers) for shallow foundations: 1) Imaginary foundation, 2) Average parameter method (APM), and 3) Terzaghi's method to compare their results with those obtained from numerical modeling by means of the finite element method using a widely applied software (Abaqus academic version). Within the methodology developed in the finite element modeling, variables were parameterized (modulus of elasticity, depth of deflection, and displacement-load) and two behavioral laws were evaluated (Elastic and Drucker-Prager). The results that were obtained from the analysis show that when performing numerical modeling using the law of elastic behavior in soils of two layers, exaggerated results are generated with respect to analytical methods. Another important result is that when hard soils are on top of soft soils the results of numerical and analytical methods tend to be similar to each other. Most importantly, the variables that have the greatest influence on the load capacity in soils of one and two layers are the angle of friction, yield stress, and in the case of numerical analysis the constraint displacement (load). In addition, it was observed that for numerical modeling better results are obtained when considering an elastoplastic model, such as Drucker Prager.

Keywords:

Article Details

Licence

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

All articles included in the Revista Facultad de Ingeniería are published under the Creative Commons (BY) license.

Authors must complete, sign, and submit the Review and Publication Authorization Form of the manuscript provided by the Journal; this form should contain all the originality and copyright information of the manuscript.

The authors who publish in this Journal accept the following conditions:

a. The authors retain the copyright and transfer the right of the first publication to the journal, with the work registered under the Creative Commons attribution license, which allows third parties to use what is published as long as they mention the authorship of the work and the first publication in this Journal.

b. Authors can make other independent and additional contractual agreements for the non-exclusive distribution of the version of the article published in this journal (eg, include it in an institutional repository or publish it in a book) provided they clearly indicate that the work It was first published in this Journal.

c. Authors are allowed and recommended to publish their work on the Internet (for example on institutional or personal pages) before and during the process.
review and publication, as it can lead to productive exchanges and a greater and faster dissemination of published work.

d. The Journal authorizes the total or partial reproduction of the content of the publication, as long as the source is cited, that is, the name of the Journal, name of the author (s), year, volume, publication number and pages of the article.

e. The ideas and statements issued by the authors are their responsibility and in no case bind the Journal.

References

[1] B. Das, N. Sivakugan, Principles of foundation Engineering. Boston: Cengage Learning, 2019, pp. 2.

[2] L. Cruz. 042082. Class Lecture, Topic: “Load Capacity.” School of Civil Engineering, University of Cauca, Popayan, 2007.

[3] C. Le, “Estimation of bearing capacity factors of cohesive-frictional soil using the cell-based smoothed finite element method,” Computers and Geotechnics, vol. 83, pp. 178-183, Mar. 2017. https://doi.org/10.1016/j.compgeo.2016.10.023

[4] S. Eshkevari, A. Abbo, G. Kouretzis, “Bearing capacity of strip footings on sand over clay,” Canadian Geotechnical Journal, vol. 56, no. 5, pp. 699-709, May. 2019. https://doi.org/10.1139/cgj-2017-0489

[5] J. Lee, S. Jeong, J. Shang, “Undrained bearing capacity of ring foundations on two-layered clays,” Ocean Engineering, vol. 119, pp. 47-57, Jun. 2016. https://doi.org/10.1016/j.oceaneng.2016.04.019

[6] P. Rao, Y. Liu, J. Cui, “Bearing capacity of strip footings on two-layered clay under combined loading,” Computers and Geotechnics, vol. 69, pp. 210-218, Sep. 2015. https://doi.org/10.1016/j.compgeo.2015.05.018

[7] S. Feng, X. Ding, Q. Zheng, Z. Chen, D. Zhang, “Extended stiffness matrix method for horizontal vibration of a rigid disk embedded in stratified soils,” Applied Mathematical Modelling, vol.77, pp. 663-689, Jan. 2020. https://doi.org/10.1016/j.apm.2019.07.035

[8] H. Kou, W. Guo, M. Zhang, Y. Xu, “Axial resistance of long rock-socketed bored piles in stratified soils,” Ocean Engineering, vol. 8, pp. 58-65, Sep. 2016. https://doi.org/10.1016/j.pisc.2016.06.080

[9] R. Casusol, “Análisis comparativo de la capacidad de carga para un suelo granular empleando métodos analíticos y computacionales,” Grade Thesis, Pontificia Universidad Católica del Perú, Lima, 2020. http://hdl.handle.net/20.500.12404/16778

[10] L. Cruz. 042082. Class Lecture, Topic: “Imaginary Foundation.” School of Civil Engineering, University of Cauca, Popayan, Sep. 2018.

[11] J. Duque, C. Lascarro, M. Gil, O. Garcia, W. Fuentes, “An extended bearing capacity equation for shallow foundations on granular trenches in soft soil,” Acta Geotechnica Slovenica, vol. 17, pp. 1-29, 2020. https://doi.org/10.18690/actageotechslov.17.1.12-22.2020

[12] M. Huang, X. Qu, X. Lü, “Regularized finite element modeling of progressive failure in soils within nonlocal softening plasticity,” Computational Mechanics, vol. 62, pp. 347-358, Sep. 2018. https://doi.org/10.1007/s00466-017-1500-6

[13] Y. Chok, M. Jaksa, W. Kaggwaa, D. Griffiths, “Assessing the influence of root reinforcement on slope stability by finite elements,” Chok et al. Geo-Engineering, vol. 6, pp. 6-12, Oct. 2015. https://doi.org/10.1186/s40703-015-0012-5

[14] J. Tamayo, A. Awruch, “On the Validation of a Numerical Model for the Analysis of Soil-Structure Interaction Problems,” Latin American Journal of Solids and Structures, vol. 13, pp. 1545-1878, Apr. 2016. https://doi.org/10.1590/1679-78252450

[15] N. Le, S. Ohtsuka, T. Hoshina, K. Isobe, “Discussion on size effect of footing in ultimate bearing capacity of sandy soil using rigid plastic finite element method,” Soils and Foundations, vol. 56, pp. 1-11, 2016. https://doi.org/10.1016/j.sandf.2016.01.007

[16] M. Pérez, “Modelación de la capacidad de carga de cimentaciones superficiales apoyados en suelos no homogéneos,” Grade Thesis, Universidad Central "Marta Abreu" de Las Villas, Santa Clara, Cuba, 2016.

[17] S. Koltuk, J. Song, R. Iyisan, R. Azzam, “Seepage failure by heave in sheeted excavation pits constructed in stratified cohesionless soils,” Frontiers of Structural and Civil Engineering, vol. 13, pp. 1415-1431, Dec. 2019. https://doi.org/10.1007/s11709-019-0565-z

[18] M. Hamlaoui, A. Oueslati, B. Lamri, G. Saxcé, “Finite element analysis of the plastic limit load and the collapse mechaism of strip foundations with non-associatted Drucker-Praguer model,” European Journal of Environmental and Civil Engineering, vol. 19, pp. 1179-1201, 2015. https://doi.org/10.1080/19648189.2015.1005162

[19] A. Mosadegh, H. Nikraz, “Bearing Capacity Evaluation of Footing on a Layered - Soil using ABAQUS,” Earth Science & Climatic Change, vol. 6, pp. 264-272, 2015. https://doi.org/10.4172/2157-7617.1000264

[20] L. Quesada, “Determinación de la capacidad de carga en cimentaciones superficiales sobre bases estratificadas en suelos friccionales,” Grade Thesis, Universidad Central "Marta Abreu" de Las Villas, Santa Clara, Cuba, 2017.

Downloads

Download data is not yet available.