エスカレータの地震応答に関する研究

抄録

In the Great East Japan Earthquake in 2011, escalator body fall accidents occurred. When a building is greatly shaken by an earthquake, an escalator may be greatly shaken as well. Therefore, top or bottom of escalators is fixed to beam of a building in order to follow layer deformation. In non-fixed side, the escalator is supported by L-form board and hanging to the beam of building. The length that escalator hanging to the beam of building is called overlap allowance. The length of the overlap allowance is determined by escalator technical standard. However, coming off of escalators from beams of the building is considered to be 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 escalators to prevent such accidents. From the above-mentioned background, this study develops the analytical model of escalators for the seismic response analysis, and clarifies the seismic behavior of escalators to use the developed analytical model of the escalator. In this paper examine the safety of the new standard Overlap Allowance in comparison with sliding displacement of the escalator at the time of the earthquake.