Abstract
In The Great East Japan Earthquake in 2011, fall accidents of escalator have occurred. In commerical building of the steel-frame, four escalators have fallen. These escalators were connected on the 3rd floor from the 2nd floor. In general, escalator set into building with either bottom or upper non-fixed style. In non-fixed side, escalator is supported by the L-form board and hanging to the beam of building. Non-fixed side absorbs layer deformation. However, it is thought that escalator came off by layer deformation with more than expected. After fall accident, the new earthquake resistant standard of the escalator was defined.by the new standard, escalator is less likely to fall. On the other hand, escalator receives compression force by a collision. It is necessary to clarify the seismic behavior of the escalator. From the above-mentioned background, the purpose of this study is to develop the analytical model of the escalator for seismic response analysis. In this paper, the development of analytical model takes the impact with beam of building. In addition, analytical model considers elasto-plastic property of the escalator truss. Seismic response an analysis of escalator installed in low-rise building. As a result, escalator receives compression force and residual displacement. Residual displacement becomes short of the overlap allowanve. Therefore, there is a possibility that escalator come off by an earthquake of a repeat.
