ISSN: 1999-8716

Keywords : Reinforced Concrete Beams


NON-LINEAR ANALYSIS OF PLATED T-SUBJECTED TO NEGATIVE BENDING MOMENT

Ahmed Abdullah Mansor

DIYALA JOURNAL OF ENGINEERING SCIENCES, 2013, Volume 6, Issue 1, Pages 90-104

ABSTRUCT:- This paper present a numerical analysis using ANSYS finite element
program to simulate the reinforced concrete T- beams strengthened with external bonded
steel plates when subjected to negative bending. Eight beams with length 2.0m and simply
supported were modeled. Nonlinear materials behavior, as it relates to steel reinforcing bars
and plain concrete, and linear behavior for plate is simulated using appropriate constitutive
models. The results showed that the general behavior of the finite element models represented
by the load-deflection curves at midspanappear well agreement with the test data from the
previous researches. Also the crack patterns at the final loads from the finite models are
discussed . The finite element models represented by this search can be used to carry out
parametric study for the strengthening of plated T-beams.

INVESTIGATIONS TO THE PARAMETERS EFFECTING SHEAR STRENGTH OF RC BEAMS STRENGTHENED WITH CFRP LAMINATIONS

Amer M. Ibrahim

DIYALA JOURNAL OF ENGINEERING SCIENCES, 2009, Volume 2, Issue 2, Pages 113-122

This paper focuses on the strengthening of reinforced concrete beams deficient in shear using external bonded Carbon Fiber Reinforced Polymer CFRP laminations. The CFRP laminations can be used to enhance the shear capacity of beams and to change the mode of failure from shear to flexure. The investigation is made in order to estimate the contribution of CFRP reinforcement to the shear capacity of strengthening reinforced concrete beams. The finite element method presented by ANSYS software used for modeling the reinforced concrete beam with CFRP strengthened. The model makes use of the ANSYS software abilities to evaluate the effects of number of parameters (CFRP strap height and thickness, carbon fiber direction with respect to beam longitudinal axis, concrete compressive strength, CFRP strip width and spacing) that are important in the response of the strengthened beam in shear. The numerical results are presented and discussed and conclusions drawn.

FINITE ELEMENT ANALYSIS OF REINFORCED CONCRETE BEAMS STRENGTHENED WITH CFRP IN FLEXURAL

Amer M. Ibrahim

DIYALA JOURNAL OF ENGINEERING SCIENCES, 2009, Volume 2, Issue 2, Pages 88-104

Numerical analyses are performed using the ANSYS finite element program to simulate reinforced concrete beams strengthened by carbon fiber reinforced polymer applied at the bottom of these beams. Nonlinear material behavior, as it relates to steel reinforcing bars and plain concrete, and linear behavior for carbon fiber reinforced polymer is simulated using appropriate constitutive models. The results showed that the general behavior of the finite element models represented by the load-deflection curves at midspan show good agreement with the test data from the previous researches. Also The crack patterns at the failure loads from the finite element models correspond well with the observed failure modes of the experimental beams. The Finite element models represented by this research can be used to work parametric study for the strengthening of beams with CFRP.