Evaluation of mechanical properties considering hysteresis characteristic of high damping rubber bearing

K. H. Park, Y. Fujiwara, T. Mazda, Y. Kajita

Research output: Contribution to journalConference articlepeer-review

Abstract

Recently, laminated rubber bearings are widely used as seismic isolators for road bridges. Although many studies have been conducted on the dynamic model of High Damping Rubber (HDR) bearings, few models can reflect phenomena such as the dependency of experienced shear strain on initial history. To develop a model that can represent the dependency of the experienced shear strain of HDR and a dynamic loading test was conducted using HDR specimens. The hysteresis characteristics of HDR was measured by applying a horizontal vibration using a hybrid actuator under a constant vertical load. Based on the cyclic shear test, the mechanical properties of HDR were calculated such as absorbed energy, hysteresis loop area, equivalent stiffness, equivalent damping ratio. Dynamic analysis was also performed from the experimental results. The dynamic model applied in program analysis is a bilinear type double-target model. This model can express the nonlinear characteristics related to the initial history of HDR bearings. The parameters required for dynamic analysis were determined from the experimental results. Through this dynamic analysis, the effectiveness of the bilinear type double target model was verified. In this research, a high damping rubber specimen was used.

Original languageEnglish
Article number012019
JournalJournal of Physics: Conference Series
Volume1687
Issue number1
DOIs
Publication statusPublished - Nov 24 2020
EventInternational Conference on Engineering Systems 2020, ICES 2020 - Moscow, Russian Federation
Duration: Oct 14 2020Oct 16 2020

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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