Site effects in the Aterno River Valley (L’Aquila, Italy): comparison between empirical and 2D numerical modelling starting from April 6th 2009 Mw 6.3 earthquake

摘要: In this paper, we focused our attention on a cross-section of the Aterno River Valley where good quality geological and geophysical dataset allowed to reconstruct accurately geometry Vs profiles along all plane section. Its trace is deliberately aligned close strong motion stations that recorded Mw 6.3 (April 6th 2009) L’Aquila earthquake. We analysed weak data available at these latter as well one temporary installed during Microzonation activities located outcropping bedrock, in proximity cross-section. used H/V technique select reliable reference site once found it, applied SSR compute amplification functions correspondence two stations. turn, for both sites performed response numerical modelling with different 2D codes compared simulated versus experimental transfer functions. constrained based very reasonable agreement between results earthquake analysis. pointed out also deposit centre valley due constructive interference S surface waves, not predictable by means 1D modelling. obtained from ones computed finding evidences non-linearity soil behaviour.