Effect of shear modulus on the performance of prototype un-bonded fiber reinforced elastomeric isolators

  • Van Thuyet Ngo Structural Engineering Division, Department of Civil Engineering, Thuyloi University, 175 Tay Son street, Dong Da district, Hanoi, Vietnam

Abstract

Un-bonded fiber reinforced elastomeric isolator (U-FREI) is light weight and facilitates easier installation in comparison to conventional steel reinforced elastomeric isolators (SREI), in which fiber layers are used as reinforcement to replace steel shims as are normally used in conventional isolators. Shear modulus of elastomer has significant influence on the force-displacement relationship of U-FREI. However, a few studies investigated the effect of shear modulus on the horizontal behavior of prototype U-FREI in literature. In this study, effect of shear modulus on performance of prototype U-FREIs is investigated by both experiment and finite element (FE) analysis. It is observed that reduction in horizontal stiffness of U-FREI with increasing horizontal displacement is due to both rollover deformation (or reduction in contact area of isolator with supports) and shear modulus of elastomer. Reasonable agreement is observed between the findings from experiment and FE analysis.

Keywords: base isolator; prototype un-bonded fiber reinforced elastomeric isolator; rollover deformation; shear modulus; cyclic test.

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Published
30-08-2018
How to Cite
Ngo, V. T. (2018). Effect of shear modulus on the performance of prototype un-bonded fiber reinforced elastomeric isolators. Journal of Science and Technology in Civil Engineering (STCE) - NUCE, 12(5), 10-19. https://doi.org/10.31814/stce.nuce2018-12(5)-02
Section
Research Papers