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Since the 1995 Hyogo-ken Nanbu Earthquake, rubber dampers have been increasingly adopted to improve seismic resistance. However, in recent years, a deterioration phenomenon in rubber dampers has been reported in which the vulcanization bonding area between the bottom of the rubber damper laminate and the bottom steel plate delaminates. Although this delamination causes a significant reduction in seismic performance, a method for measuring the accurate extent of delamination has not yet been established. In this study, numerical analyses were conducted to clarify the effect of the extent of delamination on the shear deformation shape of rubber dampers. As a result, it was found that the shear deformation shape is affected by the difference in the shape of the rubber damper warpage.

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Analytical Consideration on Delamination and Shear Deformation Shapes in Rubber Dampers

  • 会议论文

  • 发表日期：

    2025年

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  • Suguru Kodaka,
  • Kazutoshi Nagata,
  • Kunitomo Sugiura,
  • Yuina Ota,
  • Zicheng Han

摘要

Since the 1995 Hyogo-ken Nanbu Earthquake, rubber dampers have been increasingly adopted to improve seismic resistance. However, in recent years, a deterioration phenomenon in rubber dampers has been reported in which the vulcanization bonding area between the bottom of the rubber damper laminate and the bottom steel plate delaminates. Although this delamination causes a significant reduction in seismic performance, a method for measuring the accurate extent of delamination has not yet been established. In this study, numerical analyses were conducted to clarify the effect of the extent of delamination on the shear deformation shape of rubber dampers. As a result, it was found that the shear deformation shape is affected by the difference in the shape of the rubber damper warpage.