Being used for many years, the existing concrete continuous slab differs from functional design in performance?and load- appearance.This paper presents the series analytic model to calculate structural failure probability.It is that the?whole structural system should fail only if one of the structural members fails.The failure probability of the continuous slab?is the sum of the product of load- appearance probability and the failure probability under the action of the corresponding?load.Therefore, we can assess the safety of the structure and provide a theoretical basis for maintenance of existing?industrial mill building .
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