Abstract
In the 2011 off the Pacific coast of Tohoku Earthquake, four fall accidents of the escalators confirmed. In these accidents, the escalator connected on the third floor from second floor dropped at commercial facilities of the steel-frame building. In general, the escalator is set on beams of buildings with one side of the leg or both sides as non-fixed style in order not to restrict motion of the escalator. As a cause of the fall, the escalator came off from the beam of building by layer deformation more than expected. After the escalator fall accident, the new standard was defined. According to this standard, the layer deformation angle was considered more than before, and possibility which comes off the beam of building becomes short. However, it is considered that a non-fixed part collides with the beam of building by the earthquake; the collision may give compression and residual displacement to the escalator. From the above-mentioned background, the purpose of this study is to grasp behavior of response and collision of an escalator at earthquake. In this paper, behavior at an earthquake for an escalator against huge earthquake that could occur in the future was examined.
