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<p>This research details the design, experimental testing, and computational modeling of a viscoelastic coupling damper (VCD) made from natural rubber (NR) for control of structural vibration in seismic designs. A proprietary elastomer compound was formulated and modified with the correct additives and curing materials to improve mechanical, and energy dissipation characteristics. Mechanical characterization using a tensile, tear, hardness, and compression both confirmed the use of the compound, with maximum tensile strength of 2.5&#xa0;MPa, and approximately 555% elongation at break, and the material was suitable for deployment as a connection and damping interface for structural protection against vibration resulting from an earthquake event. Dynamic testing of the ultimate damper, yielded nonlinear hysteretic behavior under sinusoidal loading, from 0.1&#xa0;Hz to 1.5&#xa0;Hz, where both the energy dissipated and loss factor increased with load frequency and displacement amplitude. Maximum energy dissipation was achieved at moderate frequencies and large displacement amplitude. Finite Element Analysis (FEA), used to simulate the experimental testing using ANSYS, accurately represented the experimental test conditions, and confirmed the damper’s cyclic loading behavior. The comparison analysis between experimental and simulated testing provided excellent correlation between results. Overall, the developed VCD is a promising approach to improving structural resilience in high-rise buildings during an earthquake. The engineered natural rubber (NR) product is a reliable, low-cost passive energy dissipation strategy approach for high- rise structures to resist seismic loads.</p>

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Investigation of viscoelastic coupling damper (VCD) behaviour developed from natural rubber using experimental and computational methods

  • 期刊论文

  • 发表日期：

    2026年2月17日

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  • Grishma M. Patel,
  • Suhasini Kulkarni

摘要

This research details the design, experimental testing, and computational modeling of a viscoelastic coupling damper (VCD) made from natural rubber (NR) for control of structural vibration in seismic designs. A proprietary elastomer compound was formulated and modified with the correct additives and curing materials to improve mechanical, and energy dissipation characteristics. Mechanical characterization using a tensile, tear, hardness, and compression both confirmed the use of the compound, with maximum tensile strength of 2.5 MPa, and approximately 555% elongation at break, and the material was suitable for deployment as a connection and damping interface for structural protection against vibration resulting from an earthquake event. Dynamic testing of the ultimate damper, yielded nonlinear hysteretic behavior under sinusoidal loading, from 0.1 Hz to 1.5 Hz, where both the energy dissipated and loss factor increased with load frequency and displacement amplitude. Maximum energy dissipation was achieved at moderate frequencies and large displacement amplitude. Finite Element Analysis (FEA), used to simulate the experimental testing using ANSYS, accurately represented the experimental test conditions, and confirmed the damper’s cyclic loading behavior. The comparison analysis between experimental and simulated testing provided excellent correlation between results. Overall, the developed VCD is a promising approach to improving structural resilience in high-rise buildings during an earthquake. The engineered natural rubber (NR) product is a reliable, low-cost passive energy dissipation strategy approach for high- rise structures to resist seismic loads.