The most common procedures for predicting pore pressures generated by earthquake loading in saturated soil deposits are usually calibrated on laboratory data obtained in strain- or stress-controlled cyclic tests. A new stress-based approach under one-dimensional conditions is proposed, based on a single variable, called ‘damage parameter’, allowing the direct generalization of the cyclic test data to irregular stress histories. This method may greatly simplify dynamic response analyses of saturated sand deposits with both total and effective stress approaches, by removing the need for evaluating equivalent uniform stress cycles and avoiding to assess soil parameters for sophisticated plasticity-based models. Due to its simple and explicit formulation, the model can be incorporated in a time domain program to perform coupled effective stress dynamic analyses. Its implementation in a nonlinear 1D code has been examined through the analysis of a case study of a dyke damaged during the 2012 Emilia seismic sequence.

Application of a simplified model for the prediction of pore pressure bildup in sandy soils subjected to seismic loading / Chiaradonna, Anna; Tropeano, Giuseppe; D'Onofrio, Anna; Silvestri, Francesco; Duhee, Park. - (2015). (Intervento presentato al convegno the 6th International Conference on Earthquake Geotechnical Engineering (6ICEGE) tenutosi a Christchurch, Nuova Zelanda nel 1-4 novembre 2015).

Application of a simplified model for the prediction of pore pressure bildup in sandy soils subjected to seismic loading

D'ONOFRIO, ANNA;SILVESTRI, FRANCESCO;
2015

Abstract

The most common procedures for predicting pore pressures generated by earthquake loading in saturated soil deposits are usually calibrated on laboratory data obtained in strain- or stress-controlled cyclic tests. A new stress-based approach under one-dimensional conditions is proposed, based on a single variable, called ‘damage parameter’, allowing the direct generalization of the cyclic test data to irregular stress histories. This method may greatly simplify dynamic response analyses of saturated sand deposits with both total and effective stress approaches, by removing the need for evaluating equivalent uniform stress cycles and avoiding to assess soil parameters for sophisticated plasticity-based models. Due to its simple and explicit formulation, the model can be incorporated in a time domain program to perform coupled effective stress dynamic analyses. Its implementation in a nonlinear 1D code has been examined through the analysis of a case study of a dyke damaged during the 2012 Emilia seismic sequence.
2015
Application of a simplified model for the prediction of pore pressure bildup in sandy soils subjected to seismic loading / Chiaradonna, Anna; Tropeano, Giuseppe; D'Onofrio, Anna; Silvestri, Francesco; Duhee, Park. - (2015). (Intervento presentato al convegno the 6th International Conference on Earthquake Geotechnical Engineering (6ICEGE) tenutosi a Christchurch, Nuova Zelanda nel 1-4 novembre 2015).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/671393
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