Prediction of earthquake damages and reliability analysis using fuzzy sets

Based on the analysis of randomness of earthquake occurrence and fuzziness of earthquake intensity, a method is obtained by treating the earthquake damage prediction as fuzzy-random event. The prediction results expressed by the fuzzy probabilistic subset wholly estimated the earthquake damage assessment. In addition, considering the fuzziness of earthquake intensity, the fuzzy earthquake intensity and crisp earthquake intensity are defined. The concept and the computational method based on the fuzzy earthquake intensity and fuzzy reliability were extended from the conventional concept and the calculation the method for the reliability based on the crisp earthquake intensity. Based on the analysis of the effect of multifactors on the reliability in earthquake engineering, the method for fuzzy comprehensive evaluation of the reliability in earthquake engineering is suggested