Propuestas sobre el factor de reducción de resistencia por ductilidad y aplicación para el ecuador

We analyze 14 world studies about the ductility resistance reduction factor , and other four developed in the Scientific Research Centre at the Army Polytechnic School by Aguiar and Guerrero at 2006, by Aguiar and Gonzalez at the same year, and by Aguiar, Romo y Aragon at 2007, and we make a comparative analysis. The first work it’s based on 63 registers of 15 earthquakes registered in Colombia, Peru, Chile and Argentina with soil acceleration 15% over gravidity acceleration, but these registers are not classified by soil type. The results obtained are compared with Nassar and Krawinkler research published at 1991, and with Miranda research published at 2000, both of them worked with United States of North America registers. The results are very approximated even when we used earthquakes registers from different countries.