Abstract
The maximum accelerations of upper floors of the 29-stories building (Kogakuin University) in Tokyo were 150 - 350 cm/sec2 during the 2011 Great Tohoku Earthquake, and consequently, several ceiling boards of an integrated ceiling system fell. In order to investigate the mechanism of the fall, we carried out the full-scale shaking table tests and found that it was caused by not only the lateral movement of the ceiling boards due to the high accelerations, but also the deformation of the flexible bearing members by the inertial force of the boards