Strain sensing and crack detection during simulation of column failure
The performance of a full-scale concrete structure was investigated during the simulation of column failure. EpsilonSensors were installed inside the slab by tightening to the existing reinforcement. The main aim was to observe the crack morphology. Additional optical fibres were glued to the steel reinforcement to analyse its behaviour during the yielding process. The Nerve-Sensor system measured strains successfully during the entire research until the planned structural failure.
DFOS Sensors Installed: EpsilonSensor
Project challenges
Benefits of using the DFOS monitoring system
Results of using the DFOS monitoring system
EpsilonSensors allowed for detailed structural performance analysis during key research steps: (1) mechanical loading in the elastic range, (2) changing the static scheme by removing the column (see the first cracks in the figure) and (3) additional loading through hydraulic jacket up to the total structural failure. Max. registered strains were ten times higher than in the case of conventional foil strain gauges, which were destroyed very early on.
Example results
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