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Shock and Vibration
Volume 2017 (2017), Article ID 3675470, 12 pages
https://doi.org/10.1155/2017/3675470
Research Article

Arc-Surfaced Frictional Damper for Vibration Control in Container Crane

School of Logistics Engineering, Wuhan University of Technology, Wuhan 430063, China

Correspondence should be addressed to Jianming Yuan; moc.361@mjy_uthw

Received 14 November 2016; Accepted 12 January 2017; Published 9 February 2017

Academic Editor: Marcello Vanali

Copyright © 2017 Gongxian Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In this paper, a new arc-surfaced frictional damper (AFD) is proposed and its hysteretic behavior is experimentally studied. Then the device is applied to container crane based on a seesaw mechanism. The major advantage of the seesaw damping system is that the long tension cables can be utilized as bracing between the seesaw member and the portal legs to avoid compression and buckling of the cables. A simplified trilinear force-displacement model on the basis of experimental results is adopted to represent the hysteretic behavior of AFD. After that, seismic responses of container crane with and without dampers to four earthquakes are studied using nonlinear dynamic time-history analysis. Besides this system, a diagonal-brace-AFD system is studied for comparison. A method based on the displacement and energy dissipation ratio is proposed to find the optimum slip force for seesaw damping system. Performance of AFD control system is assessed though various parameters including displacement and maximum portal frame drift angle. Results prove a feasible application of AFD control system to absorb large amounts of seismic energy and significantly reduce the structural responses.