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Numerical Study on the Ultimate Behavior of Elastomeric Bearings under Combined Compression and Shear

  • Structural Engineering
  • Published:
KSCE Journal of Civil Engineering Aims and scope

Abstract

Predicting the ultimate behavior of elastomeric bearings subjected to combined compression-shear loading is an indispensable part of quantitatively evaluating the performance of seismic isolated structures during earthquakes. In this paper, the initial critical load derived from three different approximations for bending modulus are analyzed and evaluated by existing experimental data. Then, Finite Element (FE) models of bearings are developed and validated by critical load results. Based on that, a parametric FE study is performed to investigate the failure mode of bearings under this combined loading. It is demonstrated that the bending modulus based on the pressure solution and further simplification provides a more reasonable estimate of initial critical load. The predicting capacity of the overlapping area method for the general trend of critical load is improved with the increasing of external diameter. The dividing line between stability limit and shear failure is dominated by the second shape factor. Furthermore, as the first shape factor increases, the ultimate shear deformation corresponding to shear failure slightly increases.

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Authors and Affiliations

  1. School of Civil Engineering, Southeast University, Nanjing, 210096, China

    Tong Zhou, Yi-Feng Wu & Ai-Qun Li

  2. Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China

    Ai-Qun Li

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  1. Tong Zhou
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  2. Yi-Feng Wu
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Correspondence to Ai-Qun Li.

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Zhou, T., Wu, YF. & Li, AQ. Numerical Study on the Ultimate Behavior of Elastomeric Bearings under Combined Compression and Shear. KSCE J Civ Eng 22, 3556–3566 (2018). https://doi.org/10.1007/s12205-018-0949-y

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  • DOI: https://doi.org/10.1007/s12205-018-0949-y

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