Abstract
The seismic internal stability analysis of geosynthetic-reinforced earth structures (GRESs) is typically conducted under idealized two-dimensional conditions. Though this assumption simplifies the analysis and design procedure, GRESs are three-dimensional in nature. In addition, existing seismic internal stability analyses of three-dimensional GRESs focus on the required strength of reinforcement, ignoring potential pullout failure of reinforcement. This may result in potentially underconservative design as the required length of reinforcement is a vital part of the internal stability analysis of GRESs. In this study, both the required strength and length of reinforcement of three-dimensional GRESs are calculated considering pseudostatic seismic loading. The results are compared with idealized two-dimensional solutions and presented in the form of stability charts for illustrative purposes and ease of application. It shows that seismic loads amplify the effects stemming from consideration of three-dimensional conditions.
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