STRUCTURAL ANALYSIS AND DESIGN OF STATICLY UNDETERMINED PRE-STRESSED BRIDGE STRUCTURE

Abstract

In this work, the static and dynamic structural analysis of the bridge of the new I-B line road at the stop at km 66+270.5 on the Kula section is presented. The analysis model of the bridge was modelled in the CSiBridge V24 software package using a spatial model with surface finite elements, as well as modelling the span structure itself in the SAP2000 V24 software using line finite elements. By prestressing the bridge span structure, the theoretical bases related to statically indeterminate continuous constructions were processed, the stress values ​​as well as the impact in the span beam from the permanent prestress force obtained on the basis of two different models were compared, all according to the current standard Eurocode part EN-1992-1-1 while the design of all elements of the bridge structure was carried out for the static and for the dynamic model according to the Eurocode standard. This work deals with the design of a statically undetermined prestressed bridge structure, where the possibilities of modelling the span structure with simplified line models and more complex spatial surface models, based on the change in stress state due to subsequent prestressing, are examined.