Shigehiko Saito

Modelling and Nonlinear FE Analysis of Deteriorated Existing Concrete Structures Based on Inspection

In evaluating structural behaviour of deteriorated existing concrete structures by numerical analysis, it is important to properly detect and quantify material deterioration in the objective structure by means of conducted on-site inspection and to adequately consider them in terms of FE modelling. When the deterioration level of the structure is low, its structural behaviour can be estimated by a common numerical method with sound structure as much as the effect of deterioration is considered in constitutive models. In case of heavily deteriorated structure, however, the way of macroscopic modelling of deteriorated portion has great influence on analytical results. In addition, since an actual structure is generally composed of number of structural members having various levels of deterioration, it is essential to analyze whole the structure instead of part of the structure in order to know overall performance of the structure adequately. In this paper, a general procedure for nonlinear FE analysis of a deteriorated existing concrete structure based on on-site inspection is proposed and an integrated case study of analysis of a concrete bridge with reinforcement corrosion is demonstrated.