Vulnerability assessment of RC structures using fuzzy logic

Damage assessment involves the difficulties of defining, assessing, and modelling the variables involved as well as handling uncertainty. This paper presents a methodology for the damage assessment of RC structures based on fuzzy logic. In the proposed system, the variables defined are the same as those used in the “rapid screening procedure” developed by FEMA and described through a data collection form from its handbook. Firstly, the vertical regularity and the geometry of the structure are defined using the variables of the data collection form. Secondly, three new, more general, variables are defined based on other structural and soil parameters. These variables are: ‘Earthquake Hazard’, ‘Structural Strength’ and ‘Construction Characteristics’. Finally, from these three general variables, a damage rate for any structure can be estimated. The results of FEMA case studies are compared with those of this methodology using fuzzy logic. In addition, the estimated damage factor was compared with those estimated in previous studies.