Regresar

Evaluation of local site effect in mula town (Murcia, Spain) applicable to seismic risk management

Abstract:

The determination of seismic hazard oriented to seismic risk management in urban areas requires an investigation over the possibility of resonance in the dynamic behaviour of buildings and soils. This work classified, according to their seismic amplification capacity, urban shallow geologic materials in 5 types identifying the nature of the materials and obtaining the calculated values of S wave velocity. High density short-period ambient vibration measurements were carried out in the research area, applying Nakamura's method to determine a predominant period distribution map. The evaluation of ground seismic amplification has been performed by comparison of the results from simultaneous strong motion records on different soil conditions using strong motion record in hard rock as reference site. Ambient vibration measurements at 20 RC buildings (between 2 and 8 stories) were performed in order to analyze the dynamic behavior of buildings, and to calculate the natural periods. These results will be applicable to seismic risk management of the town of Mula.