Evaluation of Elder and Historical Bridges

Bridge structures are designed on lifetime, which is given in standards and relevant time of design. The design lifetime of bridge structures was 80 years according to expired Slovak standard STN. New design lifetime of the newly designed bridges extends to Td = 100 years by establishing Eurocode STN EN. In the frame of research activities of Department of Structures and Bridges, the theoretical approach for evaluation of existing bridge structures was developed taking into account Eurocodes. However, the problems occur in the case of elder bridges with real lifetime over 100 years, or in the case of remaining lifetime extension over 100 years.