Reliability analysis of precast prestressed concrete bridge girders based on AASHTO LRFD and EUROCODE specifications

Çelik, Ceyhan
Different bridge specifications are used in bridge designs depending on special conditions and needs. Since each bridge specification has its own specific design requirements and structural safety margins, different bridge cross-sections can appear for the same bridge spans. In the literature, it is seen that the reliability index is accepted as one of the basic measures in evaluating structural safety of bridges. In this thesis, the reliability levels of prestressed bridge girders designed according to American and European bridge specifications are calculated and compared. The main purpose of this study is to compare the American and European bridge specifications, which are used predominantly in bridge design practice, to determine the difference between the structural safety levels of these specifications. In this study, bridges with span lengths of 25 m, 30 m, 35 m and 40 m were taken into consideration. KGM-45 type truck loading which is frequently used for bridge design in Turkey was determined to be live load model designed according to AASHTO LRFD specification. Eurocode load model 1 has been taken into consideration as a live load model calculated based on EUROCODE provisions. The uncertainties regarding the load and resistance components required to calculate the reliability index have been determined by considering the data obtained from local sources and international studies.


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Citation Formats
C. Çelik, “Reliability analysis of precast prestressed concrete bridge girders based on AASHTO LRFD and EUROCODE specifications,” M.S. - Master of Science, Middle East Technical University, 2018.