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

Author(s): T. Ravi Mullapudi , Ashraf Ayoub

Publication: IJCSM

Volume: 12

Issue:

Appears on pages(s):

Keywords: combined loading, Timoshenko beam, R/C beams, uni-axial constitutive relations, tangent stiffness

DOI: https://doi.org/10.1186/s40069-018-0286-z

Date: 9/30/2018

Abstract:
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, cor-relation studies with experimentally-tested concrete specimens have been conducted.