This paper critically examines the numerical predictions of the seismic site response of both ideal and real cases as obtained by means of mono- and multi-dimensional Finite Element (FE) approaches. Ideal case-studies are first considered, aiming at validating the adopted numerical approach against existing analytical or simple numerical solutions. Then a three dimensional model of the Bovino urban area, located in southern Italy, was generated taking into account the real site conditions. Numerical analyses were thus carried out adopting a nonlinear elasto-plastic soil constitutive model implemented in a commercial FE code. The following issues were investigated in detail: geometrical schemes, horizontal direction of the input motion, calibration of the constitutive model and non-linear soil response. Most of the obtained numerical results, presented in terms of amplification factors, indicate that larger amplifications occur when the more realistic multi-dimensional schemes are adopted as compared to the mono-dimensional ones.
Site response analysis of an urban area: A multi-dimensional and non-linear approach / G. Falcone, D. Boldini, A. Amorosi. - In: SOIL DYNAMICS AND EARTHQUAKE ENGINEERING. - ISSN 0267-7261. - STAMPA. - 109:(2018), pp. 33-45. [10.1016/j.soildyn.2018.02.026]
Site response analysis of an urban area: A multi-dimensional and non-linear approach
D. Boldini;
2018
Abstract
This paper critically examines the numerical predictions of the seismic site response of both ideal and real cases as obtained by means of mono- and multi-dimensional Finite Element (FE) approaches. Ideal case-studies are first considered, aiming at validating the adopted numerical approach against existing analytical or simple numerical solutions. Then a three dimensional model of the Bovino urban area, located in southern Italy, was generated taking into account the real site conditions. Numerical analyses were thus carried out adopting a nonlinear elasto-plastic soil constitutive model implemented in a commercial FE code. The following issues were investigated in detail: geometrical schemes, horizontal direction of the input motion, calibration of the constitutive model and non-linear soil response. Most of the obtained numerical results, presented in terms of amplification factors, indicate that larger amplifications occur when the more realistic multi-dimensional schemes are adopted as compared to the mono-dimensional ones.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.