A biaxial hysteretic model for a structural system incorporating strength deterioration and pinching phenomena

A biaxial hysteretic model is developed to take into account the commonly observed hysteretic characteristics of strength and stiffness degradation, pinching and biaxial interaction. The concept of zero force point is proposed to develop the biaxial hysteretic model. Two non-linear inelastic springs...

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Bibliographic Details
Published in:International journal of non-linear mechanics 2009-09, Vol.44 (7), p.745-756
Main Authors: Chao, Shu-Hsien, Loh, Chin-Hsiung
Format: Article
Language:English
Subjects:
Cyclic loading test of RC column
Non-linear biaxial hysteretic model
Pinching effect
Strength and stiffness degradation
Zero force point
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Summary:A biaxial hysteretic model is developed to take into account the commonly observed hysteretic characteristics of strength and stiffness degradation, pinching and biaxial interaction. The concept of zero force point is proposed to develop the biaxial hysteretic model. Two non-linear inelastic springs and one linear elastic spring are connected in parallel to define the cyclic behavior of the proposed biaxial hysteretic model. The proposed biaxial hysteretic model is rate-independent and capable of simulating not only global (such as story shear force versus story drift response of the whole structure) but also the local hysteretic behavior of structural member (such as moment versus curvature or plastic rotation response of a structural element). The biaxial cyclic loading test data of six reinforced concrete columns, which are designed for flexural failure and shear failure, are used to validate the proposed biaxial hysteretic model.
ISSN:0020-7462
1878-5638
DOI:10.1016/j.ijnonlinmec.2009.04.005