Multi-Purpose Non-Contact Three-Dimensional Strain and Displacement Measurement System

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Ecole Polytechnique of Montreal houses the largest structural engineering laboratory in Canada and one of the top facilities of this type in the world. Large scale testing of critical components of building, bridge an dam structures are performed to better understand their behaviour under service loads up to complete failure under ultimate loading conditions. Several test programs are also carried out to evaluate the response of innovative structural systems proposed to enhance the structural performance and durability of infrastructures. Proper assessment of structural response requires an accurate and reliable measurement of the deformations and strains experienced by the test specimens. Test results are also used to verify and calibrate numerical models that are used to complement test programs by studying the effects of additional parameters or assess the performance of entire structural systems. These numerical simulations must precisely reproduce the deformations, strains, and cracks that progressively take place when the structure approaches failure, and high quality experimental data is therefore essential to develop and properly verify numerical models.