VERIFICATION OF IDENTIFICATION METHODS FOR LINEAR SYSTEMS UTILIZING SHAKING TABLE TESTS OF FULL-SCALE 4-STORY STEEL BUILDING

Abstract

The already proposed identification methods for linear systems are applied to shaking table tests of a full-scale 4-story steel building at the E-Defense. The structure is modeled as a 4DOF linear shear building in each horizontal direction. Only accelerations recorded at the centers on all floors are utilized for the identification. Natural frequencies, the corresponding damping ratios and modal shapes in the lowest two modes are evaluated by one-input-four-output ARX models. These modal parameters are utilized to identify the mass, damping and stiffness matrices. The results are compared with the structural parameters reported by the E-Defense project team.