高層ビルにおけるエレベータの耐震解析

概要

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Recent earthquakes have caused extensive damage to non-structural elements of buildings such as elevators, electrical equipment, communication systems etc. Elevators especially were significantly damaged by the Alaska earthquake (1964) and the San Fernando earthquake (1971). The typical pattern of the damage is as follows : During the early stage of an earthquake, the counterweights bend or break their roller guides and deform their rails. Consequently, they are thrown out of their rails and as the earthquake progresses the derailed counterweights inflict additional damage on guide rails, brackets, spreader beams and cars. In this paper, dynamic analysis methods which compute the behavior of moving elevators during an earthquake are described. And the high-speed sample elevators (υ=9m/sec) installed in one tall building of 55 stories are analyzed. The results show that maximum acceleration induced in the elevator is amplified 3〜4 times from maximum ground acceleration when the elevator is in the lower stories of the building and this amplification factor decreases as the elevator reaches the upper stories. The maximum acceleration of the elevator while in motion or stationary is not highly affected.
社団法人日本建築学会の論文
1975-02-28