Displacement and strain field photogrammetric measurements of a reinforced concrete slab submitted to an earthquakes loading.

Optical measurements made on the connection zone between a slab and a pillar of a structure under large seismic loading permitted to characterise their interaction. The measurement noise was 0.04 mm on a zone spanning 2.2x1.3 m. Particular attention has been paid to the cracks pattern and to its opening during the cycles of the test.