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Probabilistic models for curvature ductility and moment redistribution of RC beams

journal contribution
posted on 13.11.2019, 00:00 by Hassan BajiHassan Baji, HR Ronagh
It is generally accepted that, in the interest of safety, it is essential to provide a minimum level of flexural ductility, which will allow energy dissipation and moment redistribution as required. If one wishes to be uniformly conservative across all of the design variables, curvature ductility and moment redistribution factor should be calculated using a probabilistic method, as is the case for other design parameters in reinforced concrete mechanics. In this study, simple expressions are derived for the evaluation of curvature ductility and moment redistribution factor, based on the concept of demand and capacity rotation. Probabilistic models are then derived for both the curvature ductility and the moment redistribution factor, by means of central limit theorem and through taking advantage of the specific behaviour of moment redistribution factor as a function of curvature ductility and plastic hinge length. The Monte Carlo Simulation (MCS) method is used to check and verify the results of the proposed method. Although some minor simplifications are made in the proposed method, there is a very good agreement between the MCS and the proposed method. The proposed method could be used in any future probabilistic evaluation of curvature ductility and moment redistribution factors. © 2015 Techno-Press, Ltd.

History

Volume

16

Issue

2

Start Page

191

End Page

207

Number of Pages

17

ISSN

1598-8198

Publisher

Techno-Press, Korea

Peer Reviewed

Yes

Open Access

No

Acceptance Date

27/04/2015

Era Eligible

Yes

Journal

Computers and Concrete