Abstract
Accuracy of bending moment of single bridge column evaluated by shake table experiments was clarified using two methods; (1) method based on forces measured by load cells, and (2) method based on inertia force which is imposed to the column. It is found from implementation of the two methods to an E-Defense shake table experiment that column bending moments about the transverse direction are relatively simlar. However, about the longitudinal direction , the column bending moment evaluated based on inertia force is smaller than that evaluated based on forces measured by load cells because of the complex boundary condition in the transverse direction.