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An analytical model for shear links in eccentrically braced frames

  • Ashtari, Amir (Department of Civil Engineering, Science and Research Branch, Islamic Azad University) ;
  • Erfani, Saeed (Department of Civil Engineering, Amirkabir University of Technology)
  • Received : 2016.06.29
  • Accepted : 2016.10.19
  • Published : 2016.10.30

Abstract

When an eccentrically braced frame (EBF) is subjected to severe earthquakes, the links experience inelastic deformations while beams outside of the link, braces and columns are designed to remain elastic. To perform reliable inelastic analyses of EBFs sufficient analytical model which can accurately predict the inelastic performance of the links is needed. It is said in the literature that available analytical models for shear links generally predict very well the maximum shear forces and deformations from experiments on shear links, but may underestimate the intermediary values. In this study it is shown that available analytical models do not predict very well the maximum shear forces and deformations too. In this study an analytical model which can accurately predict both maximum and intermediary values of shear force and deformation is proposed. The model parameters are established based on test results from several experiments on shear links. Comparison of available test results with the hysteresis curves obtained using the proposed analytical model established the accuracy of the model. The proposed model is recommended to be used to perform inelastic analyses of EBFs.

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