Therefore, in this paper, a sensing model for measurements of the serviceability related responses of
a building structure in motion using a 2D laser scanner is presented. The feasibility of the sensing
model based on a 2D laser scanner is tested through free vibration tests of a three-story steel frame
structure. In the experimentation, the maximum lateral displacement and deformed shapes obtained
from the model are compared with those measured directly from laser displacement sensors. In
addition, dynamic properties of the three-story steel frame structure obtained both from accelerometers
and the proposed model are compared.