Identification and characterization of a potencial of site effects using robust numerical modelling of equarthquake ground motion
Investigators from institution:
Peter Moczo, Jozef Kristek, Svetlana Stripajová, Filip Kubina, Filip Michlík
The last two decades tragically and dramatically demonstrated capability of even relatively weak earthquakes to cause human losses and damage. The key reasons for this are buildings which are not designed/reinforced to withstand earthquake ground motion (EGM), increasing vulnerability due to technological complexity of densely populated areas, and anomalous earthquake ground motion due to local surface geological conditions. Seismic wave interference and resonant phenomena in sediment-filled basins and valleys can produce anomalously large EGM and cause the so called “site effects”. Site effects pose a potential threat also for important nuclear and industrial facilities. It is therefore important to identify and characterize a potential of site effects at sites of interest. In the absence of sufficient earthquake recordings one possible approach is to numerically simulate EGM. We assume that a verified and validated computationally efficient numerical method makes it possible to obtain synthetic “data” that could approximately substitute missing measured data for which we would have to wait for a too long time. A systematic investigation of EGM characteristics in a significant/representative set of realistic models of local conditions can lead to identification of key EGM characteristics and key structural parameters responsible for site effects, and consequently to identification and characterization of a potential of site effects in the set of considered local surface conditions.