Two-level fuzzy comprehensive evaluation for structural wind-induced vibration performance

The fuzzy comprehensive evaluation theory was introduced here to predict performance level of high-rise buildings in wind-induced vibration.A series of evaluation factors,such as,top peak acceleration and story drift,were studied in detail and divided into three categories of main structure,outer environment and foundation.To fully reflect the influence of the factors on the performance level,a multi-level evaluation system was established firstly and then a fuzzy comprehensive evaluation model was proposed to predict the performance level of high-rise buildings with wind excitation.Based on the proposed model,the performance level of four high-rise buildings built in Guangzhou city were predicted and calculated with Matlab program.Results showed that influences of all of the evaluation factors can be well considered and the corresponding weight coefficient of each factor can be calculated reasonably with an analytic hierarchy process,they then realize the prediction of the performance level of the four buildings and the reliable prediction results are obtained;the results of the proposed two-level fuzzy comprehensive evaluation are more superior than that of a single fuzzy comprehensive evaluation,especially for some engineering cases with many evaluation factors existing.The results of this study provided a guide and a reference for structural wind-resistant designs or reinforcing engineering designs.