The direct boundary element method: 2D site effects assessment on laterally varying layered media (methodology)

摘要: The Direct Boundary Element Method (DBEM) is presented to solve the elastodynamic field equations in 2D, and a complete comprehensive implementation given. DBEM useful approach obtain reliable numerical estimates of site effects on seismic ground motion due irregular geological configurations, both layering topography. method based discretization classical Somigliana's representation equation which stems from reciprocity theorem. This given terms Green's function full-space harmonic steady-state fundamental solution. formulation permits treatment viscoelastic media, therefore models with intrinsic attenuation can be examined. By means this approach, calculation 2D scattering waves, incidence P SV waves topographical profiles performed. Sites such as, canyons, mountains valleys multilayered media are computed test technique. obtained transfer functions show excellent agreement already published results.