LOADING TESTS AND INVESTIGATION OF ANALYTICAL MODELS FOR BI-DIRECTIONAL RESTORING FORCE RESPONSE OF ELASTOMERIC BEARINGS

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Other Title
  • 免震ゴム支承の水平２方向復元力特性に関する載荷実験および復元力モデルの比較検討

Abstract

 Although seismic response of structures can result in structural failure as a consequence of three-dimensional response including coupled bi-directional inelastic response effects, the current seismic design method for bridges with seismic isolation bearings is based on dynamic response under unidirectional excitation and requirements derived from the behavior of the bearings subjected to uni-directional loading under a constant axial force. In this study, the hysteretic behavior of high damping rubber bearings under bi-directional loading condition and earthquake excitations is discussed, along with the comparison with representative simple numerical models to expresses the bi-directional behavior, such as the orthogonal combination of bi-linear hysteretic models and Multiple Shearing Spring (MSS) model. Square-shaped laminated rubber bearing specimens of HDR-S type are used in uni- and bi-directional quasi-static loading tests as well as hybrid simulation (pseudo-dynamic) tests. Difference between the nonlinear models and test results is significantly large for the circular displacement path loading case with 225% shear strain. For bi-directional seismic response cases, deviation of the numerical model prediction from the test results is ovserved due to the strain dependency of the restoring force characteristics.

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Details 詳細情報について

  • CRID
    1390282680326637824
  • NII Article ID
    130004556939
  • DOI
    10.2208/jscejseee.69.i_311
  • ISSN
    21854653
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
    • KAKEN
  • Abstract License Flag
    Disallowed

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