Numerical Analysis of Fiber-Reinforced Soils Based on the Equivalent Additional Stress Concept
Publication: International Journal of Geomechanics
Volume 19, Issue 11
Abstract
Conventional numerical analysis methods for fiber-reinforced soils involve either cumbersome procedure or neglect of evolving fiber–soil interaction. In this paper, a new numerical analysis method is developed based on the equivalent additional stress (EAS) concept. Fibers' reinforcing effects are treated as compressive stress increments (CSIs) within soils conforming to the modified Cam-Clay (MCC) model. The radial and axial components of the CSIs are superimposed iteratively on the principal stress increments. A fiber constitutive model, a sliding function, and a spherical coordinates system are introduced, enabling the method to account for fiber plastic deformation and breakage, and imperfect fiber–soil bonding. An iterative routine is programmed to calculate the response of fiber-reinforced soils to triaxial compression. The calculated response is compared with the test results by the authors and the test and calculation results by other researchers, indicating that the method well captures the strength and deformation behavior of fiber-reinforced soils at different fiber orientation distribution forms and volumetric fiber concentrations, but slightly overestimates the internal friction angle and energy absorption capacity.
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Acknowledgments
This research work was funded by the National Natural Science Foundation of China (Nos. 51774107 and 51774131), the Open Program of State Key Laboratory of Explosion Science and Technology (Beijing Institute of Technology) (KFJJ19-02M), the Fundamental Research Funds for the Hefei Key Project Construction Administration (2013CGAZ0771), and the Fundamental Research Funds of the Housing and Construction Department of Anhui Province (2013YF-27).
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Published In
International Journal of Geomechanics
Volume 19 • Issue 11 • November 2019
Copyright
© 2019 American Society of Civil Engineers.
History
Received: Sep 26, 2018
Accepted: Apr 11, 2019
Published online: Sep 12, 2019
Published in print: Nov 1, 2019
Discussion open until: Feb 12, 2020
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