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The use of direct boundary element method for gaining insight into complex seismic site response
Álvarez-Rubio, Sonia and Benito, Juan Jose and Sánchez-Sesma, Francisco José and Alarcón Álvarez, Enrique
The use of direct boundary element method for gaining insight into complex seismic site response.
"Computers & Structures", v. 83
The boundary element method is specially well suited for the analysis of the seismic response of valleys of complicated topography and stratigraphy. In this paper the method’s capabilities are illustrated using as an example an irregularity stratified (test site) sedimentary basin that has been modelled using 2D discretization and the Direct Boundary Element Method (DBEM).
Site models displaying different levels of complexity are used in practice. The multi-layered model’s seismic response shows generally good agreement with observed data amplification levels, fundamental frequencies and the high spatial variability. Still important features such as the location of high frequencies peaks are missing. Even 2D simplified models reveal important characteristics of the wave field that 1D modelling does not show up.
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