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Universidad EAFIT
Carrera 49 # 7 sur -50 Medellín Antioquia Colombia
Carrera 12 # 96-23, oficina 304 Bogotá Cundinamarca Colombia
(57)(4) 2619500




​​​​​Site Effects in Earthquake Engineering

It is a widely known fact that the mechanical properties and the morphology of the last tens to hundreds of meters of a soil deposit strongly influence the final ground response during an earthquake. Despite the importance of this local effect on the determination of the earthquake design ground motions, its consideration on seismic design regulations is still at a very infant stage. 
The city of Medellin, is located over a complex topographic scenario; it exhibits localized variations in soil properties; and is placed within an important seismic environment. These combined factors offer valuable opportunities to study the problem of site effects.​ 
​The velocity model of Aburra's Valley can be downloaded from: Aburra's Valley VM 

​Effects of Topography on the 3D Seismic Ground Motion Response​

​​​​​​In this work we provide results from 3D earthquake simulations aiming at improving the understanding of the Aburrá valley’s seismic response. Our simulations consider the superposition of surficial 3D topography, near earthquake sources, and heterogeneous velocity structure. 
Our findings show the significant impact of surficial topography and near earthquake sources combined. In particular we give evidence of significant ground motion changes throughout the Aburrá valley region, as well as a pervasive seismic energy amplification at the elevated part of the eastern flank of the valley.​ 

A SuperpositionBasedDiffractionTechnique to Study Site Effects in Earthquake Engineering

We describe a method to study scattering of plane SH waves by surface topographies of arbitrary shape as those typically found in problems related to site effects in earthquake engineering. The analysis method uses superposition ideas and geometrical ray theory in the frequency domain. 
Última modificación: 21/03/2017 22:48