Dynamics and Control of Elevators with Large Gaps and Rubber Dampers
Publication: Journal of Structural Engineering
Volume 115, Issue 11
Abstract
Structural dynamic responses of elevator counterweight systems with discontinuous connectivity (a large gap) between the counterweights and their frame are evaluated using the finite element techniques. External base excitation results in dynamic contacts between the weights and frames. A contact element with nonlinear stiffness and damping is developed to simulate the dynamic contact. To prevent the dynamic contacts and to improve the structural dynamic responses, rubber dampers modeled by a rubber finite element are introduced between the frame and the weights. The analyses show that introducing a large separation between the counterweights and the frame eliminates the dynamic contact at small amplitude oscillation; however, the contact load increases if the base motion exceeds the separation. The implementation of rubber damping can reduce the load by 84% as compared with that of current design practice. A design equation and a proposed installation of the rubber damper are also proposed and illustrated.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 115 • Issue 11 • November 1989
Pages: 2753 - 2771
Copyright
Copyright © 1989 ASCE.
History
Published online: Nov 1, 1989
Published in print: Nov 1989
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