BB-SPEEDset: A Validated Dataset of Broadband Near-Source Earthquake Ground Motions from 3D Physics-Based Numerical Simulations

ABSTRACT This article introduces a strong-motion dataset of near-source broadband earthquake ground motions from 3D physics-based numerical simulations—named BB-SPEEDset—obtained by the code SPEED (SPectral Elements in Elastodynamics with Discontinuous Galerkin)—developed at Politecnico di Milano, Italy. Taking advantage ground-motion scenarios produced so far SPEED, most cases validated against recordings, main objective this work is to construct and validate simulated waveforms be used as support for characterization modeling motions. To pursue objective, following steps were necessary, namely: (1) implementation an effective workflow suitable process homogeneous format various simulations; (2) generation time histories using technique based on artificial neural networks, trained records; (3) creation flat file collecting, each scenario, relevant metadata (fault rupture site response proxies, source-to-site distances) well comprehensive set intensity measures processed (peak acceleration, velocity displacement, spectral ordinates, duration, pulse period, etc.). Finally, consistency checks made verify absence any systematic bias trend BB-SPEEDset results respect NEar-Source Strong-motion (NESS) version 2.0 recorded dataset. Indeed, features motion BB-SPEEDset, ranging statistical distributions peak integral both short long periods, attenuation distance, impulsive directionality effects, are substantial agreement those NESS.