Performance and Mechanical Model of Viscoelastic Laminated Composite Dampers
Publication: Journal of Materials in Civil Engineering
Volume 32, Issue 6
Abstract
In this study, three types of viscoelastic laminated composite dampers (VLCDs) were fabricated and experimentally analyzed. The dampers were fabricated by adding mesh skeleton materials to acrylic rubber to increase its stiffness; this can provide greater restoring force to passive control structures under the same strain conditions. The mechanical properties of the VLCDs were studied by measuring the maximum shear stress, storage shear modulus, loss factor, and equivalent viscous damping ratio under the same ambient temperature and different loading schemes. The experimental results showed that: (1) the addition of aramid mesh skeleton material to the damper can improve its stiffness without changing the matrix of the damping material; (2) the strain amplitude significantly affects the mechanical properties of VLCDs; (3) the excitation frequency has a slight impact on these mechanical properties; and (4) the influence of large-strain low-cycle fatigue on these mechanical properties is significant during the first 15 cycles and less significant during the next 15 cycles. Furthermore, hysteresis curves were calculated and simulated using the Bouc-Wen-Baber-Noori model. The simulation and experimental results agreed well with each other.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available from the corresponding author by request.
Acknowledgments
The authors gratefully acknowledge the Yunnan Earthquake Engineering Research Institute for support during the experiments and Yunnan Quakesafe Seismic Isolation Technologies Co., Ltd., for supplying the materials. This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
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Published In
Journal of Materials in Civil Engineering
Volume 32 • Issue 6 • June 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Jun 4, 2019
Accepted: Sep 30, 2019
Published online: Mar 25, 2020
Published in print: Jun 1, 2020
Discussion open until: Aug 25, 2020
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