Behavior of Post-Tensioned concrete box girder with multiple damaged tendons A Case Study of the Sykkylvsbrua

Abstract

The main purpose of this master thesis was to investigate the damages in simply supported box girder bridges. The was carried out by performing non-linear analysis in the Finite element analysis program DIANA FEA 10.5 The thesis is devided into two main parts. First part was based on the recreation of expe riments to gain greater knowledge of the program. The modelled experiments were four point bending tests performed on 2D ordinary reinforced beam and 3D ordinary reinforced slab with post-tensioned. For the second part of this thesis, half span of Sykkylvsbrua was modelled and loaded with self weight and traffic load in addition to the post tensioning load to inspect how damages in embedded active reinforcements affects concrete structu res. A numerical model has been created to simulate damages in post-tensioned concrete beams and box girder.