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<p>Scrap tyre pad isolators, primarily made from car tyres, offer a sustainable alternative in seismic isolation due to their inherent energy-absorbing capabilities. This study presents an experimental and numerical investigation on the effect of introducing a central hole on the structural properties of scrap tyre pad isolators. By varying the size of the central hole, the study aims to identify the configuration that maximizes the isolator’s damping capacity and stiffness while maintaining structural integrity. The experimental phase involves cyclic shear tests to evaluate the mechanical behaviour of the isolators. A detailed study is conducted using Ansys workbench to study the effect of hole diameter on structural properties. On varying the diameter of the central hole of scrap tyre pad isolators, the specimen with a 20&#xa0;mm hole was found to be optimum, which demonstrated a 0.88% reduction in horizontal stiffness and, 18.61% increase in damping. Results indicate that the introduction of a central hole significantly influences the structural properties of the isolators. This research contributes to developing more efficient and sustainable base isolators, enhancing the seismic resilience of structures while promoting the reuse of scrap tyres.</p>

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Experimental and Numerical Investigation on the Effect of Central Hole on Structural Properties of Scrap Tyre Pad Isolators

  • 期刊论文

  • 发表日期：

    2025年10月30日

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  • Ancy Mathew,
  • Sreeranjini Saseendran Nair,
  • Sajeeb Rashid Riza

摘要

Scrap tyre pad isolators, primarily made from car tyres, offer a sustainable alternative in seismic isolation due to their inherent energy-absorbing capabilities. This study presents an experimental and numerical investigation on the effect of introducing a central hole on the structural properties of scrap tyre pad isolators. By varying the size of the central hole, the study aims to identify the configuration that maximizes the isolator’s damping capacity and stiffness while maintaining structural integrity. The experimental phase involves cyclic shear tests to evaluate the mechanical behaviour of the isolators. A detailed study is conducted using Ansys workbench to study the effect of hole diameter on structural properties. On varying the diameter of the central hole of scrap tyre pad isolators, the specimen with a 20 mm hole was found to be optimum, which demonstrated a 0.88% reduction in horizontal stiffness and, 18.61% increase in damping. Results indicate that the introduction of a central hole significantly influences the structural properties of the isolators. This research contributes to developing more efficient and sustainable base isolators, enhancing the seismic resilience of structures while promoting the reuse of scrap tyres.