MODIFICATION OF THE GIUFFRE, MENEGOTTO AND PINTO MODEL FOR UNLOADING AND RELOADING PATHS WITH SMALL STRAIN VARIATIONS

DOI Web Site 14 Citations 7 References
  • SAKAI Junichi
    Pacific Earthquake Engineering Research Center, University of California at Berkeley
  • KAWASHIMA Kazuhiko
    社団法人 土木学会 東京工業大学大学院 理工学研究科土木工学専攻

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  • 部分的な除荷・再載荷を含む履歴を表す修正 Menegotto-Pinto モデルの提案

Description

The hysteretic behavior of reinforced concrete bridge columns depends on the hysteretic behavior of reinforcing bars. The model proposed by Giuffre, Menegotto and Pinto has been widely used as a nonlinear hysteretic model for reinforcing bars because of its simple but accurate expressions. However, the model often develops an unrealistic sudden change of the stiffness resulted from partial unloadings and reloadings. In such cases, the Bauschinger effect cannot be represented. A modified model for the original Giuffre, Menegotto and Pinto model is proposed by Eqs. (10), (11) and (19) so that realistic hysteretic stress vs. strain relations after partial unloadings and reloadings can be evaluated.

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