The Behavior of Rectangular and Circular Reinforced Concrete Columns under Biaxial Multiple Excitation

Salami, Mohammad R and Afsar Dizaj, Ebrahim and Kashani, Mohammad M (2019) The Behavior of Rectangular and Circular Reinforced Concrete Columns under Biaxial Multiple Excitation. Computer Modeling in Engineering and Sciences, 120 (3). pp. 677-691. ISSN 1526-1506

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Abstract

The aim of this study is to investigate the dynamic performance of rectangular and circular reinforced concrete (RC) columns considering biaxial multiple excitations. For this purpose, an advanced nonlinear finite element model which can simulate various features of cyclic degradation in material and structural components is used. The implemented nonlinear fiber beam-column model accounts for inelastic buckling and low-cycle fatigue degradation of longitudinal reinforcement and can simulate multiple failure modes of RC columns under dynamic loading. Hypothetical rectangular and circular columns are used to investigate the failure modes of RC columns. A detailed ground motion selection is implemented to generate real mainshock and aftershocks. It was found that multiple excitations due to aftershock has the potential of increasing the damage of the RC columns and longitudinal reinforcements are significantly affected low-cycle fatigue. Also, it was found that rectangular column is more sensitive to accumulative damage due to cyclic fatigue. This study increases the accuracy of structural analysis of RC columns and consequently improves understanding the failure modes of RC columns with different cross-sectional shapes.

Item Type: Article
Identification Number: https://doi.org/10.32604/cmes.2019.05666
Date: August 2019
Uncontrolled Keywords: RC column, biaxial loading, multiple excitations, low-cycle fatigue
Subjects: H200 Civil Engineering
Divisions: Faculty of Computing, Engineering and the Built Environment
Faculty of Computing, Engineering and the Built Environment > School of Engineering and the Built Environment
Depositing User: Mohammad Salami
Date Deposited: 15 Aug 2019 07:53
Last Modified: 25 Sep 2019 09:01
URI: http://www.open-access.bcu.ac.uk/id/eprint/7791

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