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<p>The inclusion of fibers in cement-based composites has notably enhanced the seismic performance of reinforced concrete (RC) structures by improving their mechanical and dynamic properties. This study examines the seismic behavior of conventional RC and fiber-reinforced concrete (FRC) structures—incorporating steel fibers (SFRC), polypropylene fibers (PFRC), and a hybrid combination (HyFRC)—while accounting for soil-structure interaction. Nonlinear static pushover analyses were conducted on four soil types across five seismic zones. Results demonstrate that the performance point displacements for HyFRC structures are consistently 20% to 25% lower than those of conventional RC, indicating greater energy dissipation and ductility. Moreover, damage probability analyses reveal reductions in vulnerability levels by up to 10% to 15% in high seismic zones for HyFRC compared to RC structures. Similar but less pronounced improvements were observed for PFRC and SFRC. These outcomes confirm that hybrid fiber reinforcement significantly improves seismic resistance over single-fiber and conventional concrete, supporting its effective use in earthquake-resistant structural design.</p>

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Study of the Seismic Performance of Structures Built with and Without Fiber-Reinforced Concrete, Taking into Account Soil-Structure Interaction

  • 期刊论文

  • 发表日期：

    2025年10月27日

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  • Soumaya EL Janous,
  • Mohamed Amine Abid,
  • Abdelouafi El Ghoulbzouri

摘要

The inclusion of fibers in cement-based composites has notably enhanced the seismic performance of reinforced concrete (RC) structures by improving their mechanical and dynamic properties. This study examines the seismic behavior of conventional RC and fiber-reinforced concrete (FRC) structures—incorporating steel fibers (SFRC), polypropylene fibers (PFRC), and a hybrid combination (HyFRC)—while accounting for soil-structure interaction. Nonlinear static pushover analyses were conducted on four soil types across five seismic zones. Results demonstrate that the performance point displacements for HyFRC structures are consistently 20% to 25% lower than those of conventional RC, indicating greater energy dissipation and ductility. Moreover, damage probability analyses reveal reductions in vulnerability levels by up to 10% to 15% in high seismic zones for HyFRC compared to RC structures. Similar but less pronounced improvements were observed for PFRC and SFRC. These outcomes confirm that hybrid fiber reinforcement significantly improves seismic resistance over single-fiber and conventional concrete, supporting its effective use in earthquake-resistant structural design.