Earthquake Damage Prediction of Base-Isolated Structures Based on Fuzzy Comprehensive Evaluation Method

Abstract

<jats:p>Earthquake damage prediction of base-isolated structure includes many fuzzy factors, for example damage grade, intensity and so on, so by use of the fuzzy comprehensive evaluation method to predict the earthquake damage probability of the base-isolated structure should be feasible and effective. The isolated building usually consist of the isolated layer and the upper structure, so the damage grade of the base-isolated structure is divided by the performances of the isolated layer and the supper-structure. And then, the basic frame system of earthquake damage prediction based on fuzzy comprehensive evaluation method is established: the damage influence factors of the earthquake damage prediction for the isolated structure are analyzed, the corresponding hierarchy evaluations system is presented. Grade standard of damage influence factors and the determining method of membership degree for the base-isolated frame structure are given, and then the weight coefficients of the damage influence factors are studied by use of the judgment matrix analysis method, the fuzzy comprehensive evaluation model of earthquake damage prediction is given. Lastly, a numeral example is analyzed, the rationality of the method is proved.</jats:p>