Test of a concrete bridge in Sweden. ‚Äì I. Assessment methods

Puurula, Arto; Enochsson, Ola; Thun, Håkan; Täljsten, Björn; Elfgren, Lennart; Olofsson, Jan; Paulsson, Björn

doi:10.1201/9781439828434.ch446

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“…It is thereby verified that the bond failure of the FRP bars most likely triggered the final failure of the whole bridge. Preliminary descriptions of the failure process and comparisons with code values have been given in SB-7.3 (2008), Puurula et al (2008) and Sas (2011).…”

Section: Loading To Failurementioning

confidence: 99%

Loading to failure and 3D nonlinear FE modelling of a strengthened RC bridge

Puurula

Enochsson

Sas³

et al. 2013

Structure and Infrastructure Engineering

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A reinforced concrete railway trough bridge in Ö rnsköldsvik, Sweden, was strengthened in bending with rods of carbonfibre-reinforced polymer and loaded to failure. The aim was to test and calibrate methods developed in the European Research Project 'Sustainable Bridges' regarding assessment and strengthening of existing bridges. A steel beam was placed in the middle of one of the two spans and was pulled downwards. Failure was reached at an applied load of 11.7 MN. It was initiated by a bond failure caused by a combined action of shear, torsion as well as bending after yielding in the longitudinal steel reinforcement and the stirrups. The bond failure led to a redistribution of the internal forces from the tensile reinforcement to the stirrups, causing the final failure. The computer models developed to simulate the loading process were improved step by step from linear shell models to more detailed models. The most developed model, a three-dimensional nonlinear finite element model with discrete reinforcement, gave accurate accounts of the response of the bridge.

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Section: Loading To Failurementioning

confidence: 99%