Published in Scientific Papers. Series E. Land Reclamation, Earth Observation & Surveying, Environmental Engineering, Vol. XIV
Written by Stefan Florin BALAN, Bogdan Felix APOSTOL
The work describes assessments and public policies that would account for safety increase and duration in the exploitation of structures. The level at which the soil-structure interaction is approached in actual normative/codes is highlighted. Proposals for approaching different ways to rise the protection level of structures to be in seismic zones were examined, starting from their location and design; this implies the knowledge of the site seismicity, earthquakes-related parameters prediction, the importance of (extended) geotechnical studies, etc. The interaction wave-structure is studied by using the model of harmonic oscillator coupled to an elastic medium. This analysis is meant to be relevant for the effects of seismic motion upon localized structure. Also, the model of an elastic structural element embedded at one end is envisaged and the normal modes and the eigenfrequencies of this independent module are highlighted. The response to oscillating shocks is computed for various ground excitations applied to its base. The response of two coupled modules, viewed as simplified structures thereby harmonic oscillators as well, to an oscillating shock is calculated, and amplification factors are highlighted.
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