Preliminary Results on the Seismic Response of the Acropolis of Athens (Greece) through Recorded Earthquake Data and Numerical Simulations

We present in this contribution preliminary results obtained through seismic data analyses and numerical simulations of the response of the Acropolis of Athens, Greece. We use earthquake and ambient vibration data recorded by the high-quality accelerometer array operated by the Institute of Geodynamics, National Observatory of Athens (NOA-IG), in collaboration with the Acropolis Restoration Service (YSMA). The array consists of 10 strong-motion sensors (Guralp CMG-5TD) recording in continuous mode on 24-bit digitisers, sampling the main geological units constituting the Acropolis and including two sites devoted to monitoring monumental elements of the Parthenon. We compare the experimental amplification functions (SSRs, HVSRs, 5%-damped SRs) with those obtained from numerical simulations of the seismic response of the hill. The 3D computational mesh is designed in CUBIT while the simulations are carried out using the discontinuous Galerkin spectral element (SEM) computer program SPEED, naturally oriented to the evaluation of multi-scale wave propagation problems.