Computers and Concrete

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An algorithm for simulation of cyclic eccentrically-loaded RC columns using fixed rectangular finite elements discretization

  • Sadeghi, Kabir (Civil and Environmental Engineering Faculty, Near East University, Near East Boulevard) ;
  • Nouban, Fatemeh (Civil and Environmental Engineering Faculty, Near East University, Near East Boulevard)
  • Received : 2018.11.05
  • Accepted : 2018.01.22
  • Published : 2019.01.25
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Abstract

In this paper, an algorithm is presented to simulate numerically the reinforced concrete (RC) columns having any geometric form of section, loaded eccentrically along one or two axes. To apply the algorithm, the columns are discretized into two macro-elements (MEs) globally and the critical sections of columns are discretized into fixed rectangular finite elements locally. A proposed triple simultaneous dichotomy convergence method is applied to find the equilibrium state in the critical section of the column considering the three strains at three corners of the critical section as the main characteristic variables. Based on the proposed algorithm a computer program has been developed for simulation of the nonlinear behavior of the eccentrically-loaded columns. A good agreement has been witnessed between the results obtained applying the proposed algorithm and the experimental test results. The simulated results indicate that the ultimate strength and stiffness of the RC columns increase with the increase in axial force value, but large axial loads reduce the ductility of the column, make it brittle, impose great loss of material, and cause early failure.

Keywords

Acknowledgement

Supported by : Ecole Centrale de Nantes, Near East University

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