SciELO - Scientific Electronic Library Online

 
 número9Análisis experimental de la aislación sísmica de un estanque con líquido con interfaz de geosintéticosEstudio de la estabilidad de taludes en roca meteorizada de la formación Quiriquina índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Obras y proyectos

versión On-line ISSN 0718-2813

Resumen

MARTINEZ, Rafael; BARRERA, Sergio  y  GOMEZ, Patricio. The seudostatic method of dam stability: a critical analysis. Obras y Proyectos [online]. 2011, n.9, pp. 30-37. ISSN 0718-2813.  http://dx.doi.org/10.4067/S0718-28132011000100004.

A 200 m high tailings dam located in central Chile was seismically evaluated in four different cross sections using a 2D finite element model. To perform the analyses two acceleration records were used, one from the dam seismic risk study and another one from the 27th February 2010 Chile earthquake. In parallel, a number of seudostatic analyses were carried out applying a horizontal acceleration (defined in terms of a global seismic coefficient) to the same finite element model used in the dynamic analysis in order to reproduce the deformation field created by the later. A method to compare the deformation fields between the two models was developed. In this manner, the seismic coefficients that better approach the field deformations from both types of analyses were estimated. It is observed that in most cases the Chilean state-of-practice largely over-estimates the selected values of the seismic coefficient. Moreover, for different dam heights and/or different seismic frequencies, significant differences between the seismic coefficient values have been found. This study presents a first approach with the aim ofpointing out the importance of the adequate selection of seismic coefficient values used in limit equilibrium analyses.

Palabras clave : seismic coefficient; seudostatic analysis; dynamic analysis; tailings dams.

        · resumen en Español     · texto en Español     · pdf en Español