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Fiber Beam Analysis of Reinforced Concrete Members with Cyclic Constitutive and Material Laws

Mullapudi, T. R. & Ayoub, A. ORCID: 0000-0002-2670-9662 (2018). Fiber Beam Analysis of Reinforced Concrete Members with Cyclic Constitutive and Material Laws. International Journal of Concrete Structures and Materials, 12(1), 61. doi: 10.1186/s40069-018-0286-z


This paper presents a non-linear Timoshenko beam element with axial, bending, and shear force interaction for nonlinear analysis of reinforced concrete structures. The structural material tangent stiffness matrix, which relates the increments of load to corresponding increments of displacement, is properly formulated. Appropriate simplified cyclic uniaxial constitutive laws are developed for cracked concrete in compression and tension. The model also includes the softening effect of the concrete due to lateral tensile strain. To establish the validity of the proposed model, correlation studies with experimentally-tested concrete specimens have been conducted.

Publication Type: Article
Additional Information: © The Author(s) 2018. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Publisher Keywords: combined loading; Timoshenko beam; R/C beams; uni-axial constitutive relations; tangent stiffness
Departments: School of Science & Technology > Engineering > Civil Engineering
Text - Published Version
Available under License Creative Commons Attribution.

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