Análisis sísmico de estabilidad de taludes basado en desempeño

Abstract

In recent years, slopes and embankments have been affected to varying degrees by earthquakes. Depending on the damages, this type of geotechnical structures can be repaired with relative ease, hence it is important that permanent deformations and displacements that may occur after a seismic event be less than the allowable limits to ensure a prompt repair. It is proposed to make the analysis and design under concepts of performance and not of allowable stresses. The use of this approach in geotechnical earthquake engineering has increased in recent years because it offers several advantages over other methods, such as flexibility, objectivity, consistency and relevance to the needs of the evaluator and the project engineer.
ith the usual methods of analysis performance is commonly evaluated in terms of system response using traditional measures of ground motion defined by two or more levels of threat. Performancebased analysis suggests that safety factors less than unity are allowed, maintaining permanent residual deformations and displacements within a permissible range, according to the importance of the structure and the risk the engineer and the owner of the structure are willing to assume. The residual deformation or displacement calculated at the end of the earthquake is compared with a reference value. If the calculated value is greater than the allowable limit, the original design must be modified.