Host: The Japan Society of Mechanical Engineers
Name : Dynamics and Design Conference 2018
Date : August 28, 2018 - August 31, 2018
In Great East Japan Earthquake in 2011, fall accidents of escalators occurred. In the fall accidents, the escalators connected the third floor and the second floor. These occurred in commercial facilities of steel frame buildings. In general, escalators are set on beams of buildings without fixation. The cause of the fall accidents was that the escalators came off from the beams of the buildings by the great earthquake more than expected. After the escalator accidents, the quake resistance standard was revised in Japan. According to this standard, the layer displacement of buildings to be expected during earthquake is more than before. However, it is considered that a non-fixed part of an escalator collides with a beam of a building by an earthquake. In addition, the collision may give compression and residual displacement to the escalator. Therefore, the purpose of this study is to grasp dynamic behavior of an escalator at earthquake which considers impact with the beam. In this paper, behavior of an escalator during earthquakes is compared by difference of restoring force characteristics of escalator and confirm the validity of bi-linear model. In addition, as a preliminary analysis for the vibration experiments, dynamic behavior of an escalators during large earthquake is investigated by seismic response analysis model which considers interaction with the building.
