Abstract
Elevators are essential for means of vertical transportation. In recent year, Elevators to be installed in high-ride buildings are long travel, thus the elevator rope. High-rise buildings have longer natural period than conventional buildings. As elevator ropes become longer, the natural period of the elevator ropes become longer and get closer to the natural period of the building. Consequently, the elevator ropes are hooked to the equipment of well wall when the elevator ropes vibrate by an external force, such as a strong wind and earthquake. Secondary damage such as containment of passengers and elevator service stop may occur. It has become a problem. For example, The Great East Japan Earthquake in 2011, 2215 cases of problem such as catch and damage of elevator ropes have been reported. However, operations of elevators after earthquakes are required. Therefore, in this research, we aim to construct a vibration reduction method for elevators that can operate even after the earthquakes. In this report, we examine effectiveness of lifts using intermediate transfer floors for damage reduction of ropes. In the analysis, the maximum displacement of the main rope and the number of collisions were examined when the lifting travel is divided from 2 to 4. As a result of the analysis, it was confirmed that dividing the lifting travel reduces the displacement amount of the rope and the number of collisions.
