Hysteresis modelling of reinforced concrete columns under pure cyclic torsional loading

Mondal, Tarutal Ghosh and Kothamuthyala, Sriharsha Reddy and S, Suriya Prakash (2017) Hysteresis modelling of reinforced concrete columns under pure cyclic torsional loading. Structural engineering and mechanics, 64 (1). pp. 11-21. ISSN 1225-4568

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It has been observed in the past that, the reinforced concrete (RC) bridge columns are very often subjected to torsional moment in addition to flexure and shear during seismic vibration. Ignoring torsion in the design can trigger unexpected shear failure of the columns (Farhey et al. 1993). Performance based seismic design is a popular design philosophy which calls for accurate prediction of the hysteresis behavior of structural elements to ensure safe and economical design under earthquake loading. However, very few investigations in the past focused on the development of analytical models to accurately predict the response of RC members under cyclic torsion. Previously developed hysteresis models are not readily applicable for torsional loading owing to significant pinching and stiffness degradation associated with torsion (Wang et al. 2014). The present study proposes an improved polygonal hysteresis model which can accurately predict the hysteretic behavior of RC circular and square columns under torsion. The primary curve is obtained from mechanics based softened truss model for torsion. The proposed model is validated with test data of two circular and two square columns. A good correlation is observed between the predicted and measured torque-twist behavior and dissipated energy.

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IITH Creators:
IITH CreatorsORCiD
S, Suriya Prakashhttp://orcid.org/0000-0003-0319-1773
Item Type: Article
Uncontrolled Keywords: polygonal hysteresis model; RC column; torsion; primary curve; unloading and reloading rules
Subjects: Civil Engineering > Structural engineering and underground construction
Divisions: Department of Civil Engineering
Depositing User: Team Library
Date Deposited: 12 Oct 2017 10:48
Last Modified: 12 Oct 2017 10:48
URI: http://raiith.iith.ac.in/id/eprint/3616
Publisher URL: https://doi.org/10.12989/sem.2017.64.1.000
OA policy: http://www.sherpa.ac.uk/romeo/issn/1225-4568/
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