Application of the Digital-Image-Correlation Technique to Measure the Deformation of a Seismic Retrofitted Column of a Two-Storey Building

[[abstract]]In this research the digital-image-correlation (DIC) technique is used to measure the column deformation of an in situ test. A push-over test is organized on July 26 2007 on a two-storey building of Guan-Miao elementary school in Tainan, Taiwan. The columns of this building are seismic retrofitted with steel plate. The measurement result shows that the DIC technique can successfully measure the relative displacement of the column. Because we can determine the relative displacement of many points of the column, not only the deformation curve but also the rotation and curvature can be determined using interpolation method. The curvature shows that the plastic hinge is happened at about 2% storey drift ratio. It shows that the DIC technique can be applied to the measurement of a full scale in situ test