In this paper we analyze the effects of a passive fault-zone (FZ) on seismic wave propagation and, consequently, on the damage pattern produced in simulations. The computational domain corresponds to the Middle-Aterno valley and the passive fault is the Gran Sasso thrust. The fault is included in the domain using a not-honoring approach. Point sources, at different positions, are applied to better appreciate the effects of the fault shape. A test without any fault has been done to exclude any contribution of the topography.The results show that the presence of a fault-zone modifies the seismic wave paths at least in the range of the investigated frequencies. Indeed, a remarkable increase in the recorded displacement is observable, especially in the direction of the negative fault curvature. Therefore, passive fault-zones can be useful when included in the physically based models for seismic risk assessment.

On the possible use of the not-honoring method to include a real thrust into 3D physical based simulations

Di Michele, F;Pera, D;May, J;Styahar, A;Rubino, B;Marcati, P
2021-01-01

Abstract

In this paper we analyze the effects of a passive fault-zone (FZ) on seismic wave propagation and, consequently, on the damage pattern produced in simulations. The computational domain corresponds to the Middle-Aterno valley and the passive fault is the Gran Sasso thrust. The fault is included in the domain using a not-honoring approach. Point sources, at different positions, are applied to better appreciate the effects of the fault shape. A test without any fault has been done to exclude any contribution of the topography.The results show that the presence of a fault-zone modifies the seismic wave paths at least in the range of the investigated frequencies. Indeed, a remarkable increase in the recorded displacement is observable, especially in the direction of the negative fault curvature. Therefore, passive fault-zones can be useful when included in the physically based models for seismic risk assessment.
2021
978-1-6654-5843-6
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11697/197192
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