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Computers and Concrete Volume 25, Number 1, January 2020 , pages 67-73 DOI: https://doi.org/10.12989/cac.2020.25.1.067 |
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Computer aided failure prediction of reinforced concrete beam |
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A.B.M. Saiful Islam
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| Abstract | ||
| Traditionally used analytical approach to predict the fatigue failure of reinforced concrete (RC) structure is generally conservative and has certain limitations. The nonlinear finite element method (FEM) offers less expensive solution for fatigue analysis with sufficient accuracy. However, the conventional implicit dynamic analysis is very expensive for high level computation. Whereas, an explicit dynamic analysis approach offers a computationally operative modelling to predict true responses of a structural element under periodic loading and might be perfectly matched to accomplish long life fatigue computations. Hence, this study simulates the fatigue behaviour of RC beams with finite element (FE) assemblage presenting a simplified explicit dynamic numerical solution to show computer aided fatigue behaviour of RC beam. A commercial FEM package, ABAQUS has been chosen for this complex modelling. The concrete has been modelled as a 8-node solid element providing competent compression hardening and tension stiffening. The steel reinforcements are simulated as two-node truss elements comprising elasto-plastic stress-strain behaviour. All the possible nonlinearities are duly incorporated. Time domain analysis has been adopted through an automatic Newmark- | ||
| Key Words | ||
| computer aided modelling; failure prediction; fatigue; cyclic loading; explicit dynamic; cracks; damage; reinforced concrete beam | ||
| Address | ||
| A.B.M. Saiful Islam: Department of Civil & Construction Engineering, Imam Abdulrahman Bin Faisal University, 31451, Dammam, Saudi Arabia | ||