Abstract：Structural robustness is defined by the international academia as the capabilities of structural systems which make them to survive unforeseen or unusual circumstancesIn order to highlight the unforeseen and unusual characteristics of the wind hazards, this work is the first to introduce the concept of structural robustness into the windresistant design and flutter evaluation of bridges, and the wind resistance robustness of bridges is defined to be composed of strength, stiffness and stabilityFurthermore, the return period of the design wind speed that the bridge can resist is used to represent the wind resistance robustnessAiming at the problem of flutter robustness evaluation, a probabilistic model of flutter safety domain with four random variables is established, and the equivalent centerpoint method is proposed to calculate the reliability index, failure probability and return period for flutter robustnessBased on the established method of flutter robustness evaluation, the flutter robustness analysis is carried out on four completed longspan bridges and four longspan bridges to be built.
