Structural Engineering and Mechanics

  • 제49권3호
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  • Pages.395-410
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  • 2014
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Horizontal stiffness solutions for unbonded fiber reinforced elastomeric bearings

  • Toopchi-Nezhad, H. (Department of Civil Engineering, Razi University)
  • 투고 : 2012.12.17
  • 심사 : 2013.12.27
  • 발행 : 2014.02.10
⟨ 이전 논문 다음 논문 ⟩

초록

Fiber Reinforced Elastomeric Bearings (FREBs) are a relatively new type of laminated bearings that can be used as seismic/vibration isolators or bridge bearings. In an unbonded (U)-FREB, the bearing is placed between the top and bottom supports with no bonding or fastening provided at its contact surfaces. Under shear loads the top and bottom faces of a U-FREB roll off the contact supports and the bearing exhibits rollover deformation. As a result of rollover deformation, the horizontal response characteristics of U-FREBs are significantly different than conventional elastomeric bearings that are employed in bonded application. Current literature lacks an efficient analytical horizontal stiffness solution for this type of bearings. This paper presents two simplified analytical models for horizontal stiffness evaluation of U-FREBs. Both models assume that the resistance to shear loads is only provided by an effective region of the bearing that sustains significant shear strains. The presented models are different in the way they relate this effective region to the horizontal bearing displacements. In comparison with experimental results and finite element analyses, the analytical models that are presented in this paper are found to be sufficiently accurate to be used in the preliminary design of U-FREBs.

키워드

참고문헌

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피인용 문헌

  1. Roll-out instability of small size fiber-reinforced elastomeric isolators in unbonded applications vol.102, 2015, https://doi.org/10.1016/j.engstruct.2015.08.019
  2. Evaluation of horizontal stiffness of fibre-reinforced elastomeric isolators vol.46, pp.11, 2017, https://doi.org/10.1002/eqe.2879
  3. Innovative low-cost recycled rubber–fiber reinforced isolator: Experimental tests and Finite Element Analyses vol.76, 2014, https://doi.org/10.1016/j.engstruct.2014.07.001
  4. Systematic design of unbonded fiber reinforced elastomeric isolators vol.132, 2017, https://doi.org/10.1016/j.engstruct.2016.11.036
  5. Vertical and Lateral Behavior of Unbonded Fiber-Reinforced Elastomeric Isolators vol.21, pp.5, 2017, https://doi.org/10.1061/(ASCE)CC.1943-5614.0000794
  6. Lateral Response Comparison of Unbonded Elastomeric Bearings Reinforced with Carbon Fiber Mesh and Steel vol.2015, 2015, https://doi.org/10.1155/2015/208045
  7. Application of an Extended Bouc-Wen Model in Seismic Response Prediction of Unbonded Fiber-Reinforced Isolators vol.21, pp.1, 2017, https://doi.org/10.1080/13632469.2016.1138166
  8. Effect of horizontal loading direction on performance of prototype square unbonded fibre reinforced elastomeric isolator 2017, https://doi.org/10.1002/stc.2112
  9. Implementation of a simple novel Abaqus user element to predict the behavior of unbonded fiber reinforced elastomeric isolators in macro-scale computations pp.1573-1456, 2019, https://doi.org/10.1007/s10518-018-00544-6
  10. Analysis of fiber-reinforced elastomeric isolators under pure "warping" vol.61, pp.1, 2014, https://doi.org/10.12989/sem.2017.61.1.031
  11. Finite element modeling of horizontal load-displacement hysteresis loops in unbonded elastomeric isolators vol.34, pp.None, 2014, https://doi.org/10.1016/j.istruc.2021.08.095
  12. On the response of fiber reinforced elastomeric isolators (FREIs) under bidirectional shear loads vol.34, pp.None, 2021, https://doi.org/10.1016/j.istruc.2021.08.107