Statistical damage model of concrete considering coupled effect of creep and damage

concrete properties under long-term sustained loading were analyzed with statistical damage model. Based on continumm damage mechanics and statistical strength theory, the statistical damage model of concrete under sustained loading was proposed by assuming micro element of concrete with Weibull strength criteria. The coupled interaction of creep deformation by sustained loading leading to strain energy culmitimation and microcrack evolution in concrete material were analyzed in this paper. The comparison between the results by the model proposed in this paper and those by experiments in some available references indicate a good agreement, which can provide reference of dynamic design and safety evaluation of concrete structure under real work condition.