Simulating the Loading Behavior of Reinforced Strip Footings with a Double-Yield Soil Model

Abstract

Geosynthetics such as geogrid or geotextile are often used for the reinforcement of weak soils. A lot of research has been performed to investigate the bearing capacity of reinforced shallow foundations using limit equilibrium method with Mohr-Coulomb failure criterion. In this paper, the loading behavior of reinforced strip footings was studied numerically using a commercial Finite Difference program with a Double-Yield soil model. First, the load-settlement curve of an unreinforced strip footing was simulated using both Mohr-Coulomb failure criterion and the Double-Yield model. The simulated bearing capacities were then compared with Terzaghi's solution. The effects of various parameters, such as burial depth and length of the reinforcement, as well as arrangement of two reinforcement layers were also studied. Results of this study indicate that the loading behavior of strip footings simulated with the Double-Yield model is more realistic and the Manuscript Click here to download Manuscript: ASCE-IJG manuscript_revision 3.docx 2 optimum burial depth and length of reinforcement obtained from this study also agree with values reported by previous investigators.

Laboratory Testing and Numerical Simulation of a Strip Footing on Geosynthetically Reinforced Loose Sand

“…The failure mechanism and bearing capacity of reinforced soil subjected to footing load were studied by Binguet and Lee [5], Schlosser and Elias [6], Huang and Tatsuoka [7], Huang and Menq [8], Yamamoto and Kusuda [9], and many others. For designing purpose, some investigators have performed numerical simulations using finite element (FEM) method [10][11][12][13] or finite difference program [14,15] to predict the ultimate bearing capacity of reinforced soil and to optimize the arrangement of reinforcement elements beneath the footing.…”