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http://dx.doi.org/10.12989/cac.2017.20.1.085

A physically consistent stress-strain model for actively confined concrete  

Shahbeyk, Sharif (Faculty of Civil and Environmental Engineering, Tarbiat Modares University, Jalal Ale Ahmad Highway)
Moghaddam, Mahshid Z. (Faculty of Civil and Environmental Engineering, Tarbiat Modares University, Jalal Ale Ahmad Highway)
Safarnejad, Mohammad (Faculty of Civil and Environmental Engineering, Tarbiat Modares University, Jalal Ale Ahmad Highway)
Publication Information
Computers and Concrete / v.20, no.1, 2017 , pp. 85-97 More about this Journal
Abstract
With a special attention to the different stages of a typical loading path travelled in a fluid confined concrete test, this paper introduces a physically consistent model for the stress-strain curve of actively confined normal-strength concrete in the axial direction. The model comprises of the five elements of: (1) a criterion for the peak or failure strength, (2) an equation for the peak strain, (3) a backbone hydrostatic curve, (4) a transient hardening curve linking the point of departure from the hydrostatic curve to the failure point, and finally (5) a set of formulas for the post-peak region. Alongside, relevant details and shortcomings of existing models will be discussed in each part. Finally, the accuracy and efficiency of the proposed model have been verified in a set of simulations which compare well with the experimental results from the literature.
Keywords
active confinement; concrete; failure strength; stress-strain model; hydrostatic response; numerical modeling;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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