Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Application of a New Analytical-Numerical Framework for Displacement-Based Seismic Design of Geosynthetic-Reinforced Earth Structures
Design codes have recently recognized the need for using a displacement-based methodology for the seismic design of geosynthetic-reinforced earth structures (GRES), particularly when designing these structures for strong seismic events (e.g., PGA > 0.3 g). This paper illustrates the application of a recently-developed analytical-numerical framework for the internal design of GRES which accounts in a rational way for the deformations that can occur during earthquake shaking. This new framework is utilized to determine the seismically-induced superimposed force in the reinforcement and the resulting seismic displacement for a GRES. The proposed framework uses a closed-form solution which is derived using a pseudostatic limit equilibrium approach to determine the upper-bound force that can be mobilized in the reinforcement for each time increment in a given earthquake acceleration time history. Simultaneously, the utilized design framework examines a second criterion which calculates the force that can be induced in the reinforcement via an integration approach of the applied acceleration over each finite time increment. For each time increment in the earthquake acceleration record, the smaller value of the calculated forces (and its associated displacement) is selected as the prevailing value. For the GRES that was examined, comparisons with the pseudostatic inertial force showed that use of the proposed displacement-based framework can lead to a significant reduction in the required tensile strength of the reinforcement that is needed to resist seismic loading.
Application of a New Analytical-Numerical Framework for Displacement-Based Seismic Design of Geosynthetic-Reinforced Earth Structures
Design codes have recently recognized the need for using a displacement-based methodology for the seismic design of geosynthetic-reinforced earth structures (GRES), particularly when designing these structures for strong seismic events (e.g., PGA > 0.3 g). This paper illustrates the application of a recently-developed analytical-numerical framework for the internal design of GRES which accounts in a rational way for the deformations that can occur during earthquake shaking. This new framework is utilized to determine the seismically-induced superimposed force in the reinforcement and the resulting seismic displacement for a GRES. The proposed framework uses a closed-form solution which is derived using a pseudostatic limit equilibrium approach to determine the upper-bound force that can be mobilized in the reinforcement for each time increment in a given earthquake acceleration time history. Simultaneously, the utilized design framework examines a second criterion which calculates the force that can be induced in the reinforcement via an integration approach of the applied acceleration over each finite time increment. For each time increment in the earthquake acceleration record, the smaller value of the calculated forces (and its associated displacement) is selected as the prevailing value. For the GRES that was examined, comparisons with the pseudostatic inertial force showed that use of the proposed displacement-based framework can lead to a significant reduction in the required tensile strength of the reinforcement that is needed to resist seismic loading.
Application of a New Analytical-Numerical Framework for Displacement-Based Seismic Design of Geosynthetic-Reinforced Earth Structures
Vahedifard, Farshid (Autor:in) / Leshchinsky, Dov (Autor:in) / Meehan, Christopher L. (Autor:in)
Geo-Congress 2013 ; 2013 ; San Diego, California, United States
Geo-Congress 2013 ; 1158-1167
25.02.2013
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
| British Library Conference Proceedings | 2013
| British Library Online Contents | 2013
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