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http://dx.doi.org/10.7734/COSEIK.2021.34.4.213

Performance Analysis of Friction Pendulum System using PVDF/MgO Friction Material  

Kim, Sung-Jo (Department of Civil and Environmental Engineering, Yonsei University)
Kim, Ji-Su (Department of Civil Engineering, Technische Universitat Berlin)
Han, Tong-Seok (Department of Civil and Environmental Engineering, Yonsei University)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.34, no.4, 2021 , pp. 213-219 More about this Journal
Abstract
Polytetrafluoroethylene (PTFE) is a commercialized friction material in friction pendulum systems used for earthquake hazard mitigation in structures, and it has excellent chemical resistance and frictional performance. However, PTFE has a relatively low wear resistance for the friction pendulum systems in service. As an alternative to PTFE, a cost-effective frictional material, polyvinylidene fluoride (PVDF) strengthened by magnesium oxide (MgO), with enhanced wear resistance performance is proposed in this study. The frictional performance of the developed PVDF/MgO was evaluated through experiments and compared with that of PTFE. Accordingly, a friction pendulum system was designed using the measured friction coefficient. The performance of this friction pendulum system was evaluated via nonlinear time history analyses of bridges. Subsequently, the plausibility of using PVDF/MgO as an alternative to PTFE as a friction material for friction pendulum systems was discussed.
Keywords
base isolation system; friction pendulum system; nonlinear time-history analysis; OpenSees;
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