An Experimental Study on the Performance of a Damper Fabricated by Dual Rubber Springs

Choi, Eunsoo; Lee, Jonghan; Youn, Heejung

doi:10.1007/s13296-020-00385-7

Cited by 3 publications

(1 citation statement)

References 25 publications

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“…The obtained results demonstrated that the proposed system had an excellent damping energy dissipation capacity. Choi et al [28] experimentally evaluated the behavior of the smart damper equipped with dual polyurethane rubber springs and then concluded that these smart dampers initially exhibited rigid behavior in the quasi-static tests because of equipped polyurethane springs under precompression.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Behavior of Polyurethane Springs for Compression Members

2021

Applied Sciences

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In this study, the characteristics of the compression behavior of polyurethane springs that can be used as compression members of seismic devices, such as dampers and seismic isolators, were identified, and the effect of the design variables on the performance points of polyurethane springs was investigated. Compressive stiffness and specimen size were set as the design variables of the polyurethane spring, and the performance indicators were set as maximum force, residual strain, and energy dissipation. A total of 40 specimens with different conditions were fabricated and a cyclic loading test was performed to obtain the force-displacement curve of the polyurethane spring and to check the performance indicator. Significant strength degradation was confirmed after the first cycle by repeated loading, and it was confirmed that compressive stiffness and size demonstrated a linear proportional relationship with maximum force. In addition, the design variables did not make a significant change to the recovered strain, including residual strain, and residual strain of about 1% to 3% occurred. Energy dissipation showed a tendency to decrease by about 60% with strength degradation after the first cycle, and this also demonstrated no relationship with the design variables. Finally, the relationship between the design variables and performance indicators set in this study was reviewed and suggestions are presented for developing a simple design formula for polyurethane springs.

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Section: Introductionmentioning

confidence: 99%