CONFIABILIDAD SÍSMICA DE VARIOS EDIFICIOS (CUATRO A DIEZ NIVELES) LOCALIZADOS EN SUELO BLANDO DE LA CIUDAD DE MÉXICO, DISEÑADOS CON EL RCDF-2004

The reliability of eight medium height steel buildings (four to ten stories) located in soft soil in Mexico City is evaluated. They are designed in accordance with the Mexico City Building Design Code (RCDF-2004). The buildings are constituted by regular moment resistant frames. The demand hazard curves of the buildings are compared with curves (previously calculated) of three reinforcedconcrete (R/C) buildings located at the same site, and designed with the RCDF-2004. A general idea is given about the reliability implicit on the set of steel and R/C buildings. It is noticed that this is the first study developed in Mexico based on designs made in accordance with the RCDF-2004 by engineering companies. In addition, demand hazard curves of single-degree-of-freedom systems (SDOF), which are equivalent to the eight steel buildings are obtained. From the demand hazard curves of the multi-degree-of-freedom (MDOF) buildings and of the SDOF systems, a