In seismic areas geosynthetic-reinforced soil walls (GRSWs) represent a suitable alternative to conventional concrete retaining structures. Despite pseudo-static procedures still represent the basis for seismic design, the need of shifting to displacement-based analyses is widely recognized. In this framework, the paper presents a modified sliding block model proposed for the evaluation of the seismic performance of GRSWs. The model accounts for the soil-reinforcements interaction under cyclic loading conditions and for the compliance of the earth-reinforced zone which, in turn, depend on the stiffness of both reinforced soil and reinforcements. The model capability has been checked through a comparison between numerical predictions and dynamic centrifuge test results. The comparison is presented and discussed in terms of time-histories and final permanent values of seismic-induced displacements.

Seismic performance of geosynthetic-reinforced retaining walls: Experimental tests vs numerical predictions

Moraci N.
2019

Abstract

In seismic areas geosynthetic-reinforced soil walls (GRSWs) represent a suitable alternative to conventional concrete retaining structures. Despite pseudo-static procedures still represent the basis for seismic design, the need of shifting to displacement-based analyses is widely recognized. In this framework, the paper presents a modified sliding block model proposed for the evaluation of the seismic performance of GRSWs. The model accounts for the soil-reinforcements interaction under cyclic loading conditions and for the compliance of the earth-reinforced zone which, in turn, depend on the stiffness of both reinforced soil and reinforcements. The model capability has been checked through a comparison between numerical predictions and dynamic centrifuge test results. The comparison is presented and discussed in terms of time-histories and final permanent values of seismic-induced displacements.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.12318/127453
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