An\'alisis de los par\'ametros de los acelerogramas registrados en los se\'ismos de Lorca, de inter\'es para la Ingenier\'ia

TL;DR

This paper analyzes accelerograms from the 2011 Lorca earthquake to extract parameters relevant for Earthquake Engineering, highlighting the impact of near-field ground motion and its effects on seismic intensity and response spectra.

Contribution

It provides a detailed analysis of accelerogram parameters from the Lorca earthquake, emphasizing the influence of near-field motion on seismic response and engineering assessments.

Findings

Horizontal ground motion was strongest perpendicular to the fault.

Peak ground acceleration reached 0.37g, with a macroseismic intensity up to VII.

Short duration of motion mitigated damage despite high acceleration.

Abstract

Seismic crisis occurred in Lorca (Murcia) on 11th May 2011 originated an important number of accelerograms recorded in the IGN stations. The analysis of uniformly computed parameters has produced interesting results for Earthquake Engineering, in particular those recorded in Lorca. Strong ground motion has been specially observed in the horizontal component perpendicular to the Alhama de Murcia fault, at the origin of the earthquake. Values of PGA= 0,37g and CAV= 0.27g*s seems to be compensated by a short duration of the motion producing a macroseismic Intensity not greater than VII in Lorca. The contribution of near field component of ground motion due to the rupture propagation to and under the Lorca town was shown on acceleration, velocity and displacement time series and also on elastic response spectra.