Experiment Based Seismic Behavior Investigation of a Sliding Controlled Isolation System
Publication: Journal of Performance of Constructed Facilities
Volume 31, Issue 3
Abstract
The main objective of this study is to investigate the seismic behavior of an optimized version of cable-sliding friction aseismic bearing system, which is a spherical bearing combined with a set of cables to control the sliding. Basic characteristics and design method of this bearing are introduced. An experimental study including axial tensile tests of the cables and pseudostatic tests of the bearing are conducted. Seismic features including hysteretic loops, friction coefficient, and lateral restraining stiffness are analyzed based on the test data. After the test, the bearing is dissembled and damages to the bearing are illustrated and analyzed. A numerical simulation method is carried out and comparisons with the experimental results are made. The numerical results compare favorably with the experimental results. Furthermore, a case study featuring an extra-dosed cable-stayed bridge is presented. The experimental data confirm the effectiveness of the proposed design yet indicate degradation in the lateral restraining stiffness of the bearing. The case study results imply that the proposed system can control the relative displacement between the girder and pier effectively and momentary increase in the time history of the girder acceleration and pier top acceleration could be witnessed accompanying the restraining behavior. This study may be of use for seismic optimization of bridges in seismic active region.
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Acknowledgments
The authors would like to thank the National Natural Science Foundation of China (Grant Nos. 51478339, 51278376, and 91315301), the National Science and Technology Support Program of China (No. 2015BAK17B04), Jiangxi Provincial Department of Science and Technology (Grant No. 20151BBG70064), the State Key Laboratory of Disaster Reduction in Civil Engineering (Grant No. SLDRCE14-B-14), and Mr. Liang Zhou in Xinzhu Road and Bridge Machinery Co., Ltd. for their support.
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Published In
Journal of Performance of Constructed Facilities
Volume 31 • Issue 3 • June 2017
Copyright
©2016 American Society of Civil Engineers.
History
Received: Feb 23, 2016
Accepted: Aug 30, 2016
Published online: Nov 10, 2016
Discussion open until: Apr 10, 2017
Published in print: Jun 1, 2017
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