A Comparative Study of Concrete Material Models for Seismic Analysis of External Beam-to-Column Joints

Articles in Press

Authors

Faculty of Technical and Engineering, University of Mohaghegh Ardabili, Ardabil, Iran.

Abstract

In reinforced concrete (RC) moment-resisting frames, beam-to-column joints (BCJs) are crucial for transferring lateral forces, such as earthquake loads. During severe ground motions, these joints are exposed to significant forces, making them a critical zone in RC frames. In order to develop structurally sound and resilient constructions capable of withstanding seismic events, it is imperative to possess an exhaustive comprehension of the behavior of structural joints and the underlying failure mechanisms associated with them. This knowledge forms the foundation for designing robust structural systems that can effectively mitigate the adverse effects of seismic disturbances. This study utilized three commonly used concrete material models in LS-DYNA software (Winfrith model, CSCM, and CDPM) to conduct a three-dimensional nonlinear finite element analysis of external BCJs and evaluate their seismic behavior. The simulation results are compared with experimental data to validate their accuracy and reliability. The analysis results are used to assess the main characteristics of the cyclic behavior of external BCJs, including the hysteresis load-displacement curve, failure mode, stiffness degradation, and pinching. Based on these results, the advantages and limitations of each concrete material model are discussed.

Keywords

Civil Engineering Infrastructures Journal

Articles in Press, Accepted Manuscript
Available Online from 22 January 2025

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History

  • Receive Date: 14 May 2024
  • Revise Date: 08 January 2025
  • Accept Date: 22 January 2025

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