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Investigation of Load-Bearing Capacity for Reinforced Concrete Foundation Retrofitted Using Steel Strut–Tie Retrofit System

Author

Listed:
  • Jiuk Shin

    (Department of Architectural Engineering, Gyeongsang National University (GNU), 501 Jinju-daero, Jinju-si 52828, Republic of Korea)

  • Kihak Lee

    (Department of Architectural Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, Republic of Korea)

Abstract

To reduce the thickness of reinforced concrete foundation members used in construction and structural applications, a previous study developed and tested a strut–tie retrofit system installed in the foundations. This study proposes the optimum retrofit details of a steel-tie retrofit system for foundation members with reduced thickness via a finite element simulation-based load-bearing capacity assessment. The retrofit parameters (structural steel type, plate thickness, and number of strut frames) that significantly affected the load-bearing capacities were optimized by comparing the maximum effective stress and code-defined allowable stress limits. The optimum retrofit details were compared with those computed using a code-defined strut–tie model. Based on the load-bearing capacity assessment for the design of loading combinations, the optimum retrofit details can be reduced in transverse (by 55%) and longitudinal (by 87%) directions compared with those designed using the strut–tie model approach.

Suggested Citation

  • Jiuk Shin & Kihak Lee, 2023. "Investigation of Load-Bearing Capacity for Reinforced Concrete Foundation Retrofitted Using Steel Strut–Tie Retrofit System," Sustainability, MDPI, vol. 15(13), pages 1-16, June.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:13:p:10372-:d:1184146
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    References listed on IDEAS

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    1. Mohammad Panjehpour & Hwa Kian Chai & Yen Lei Voo, 2015. "Refinement of Strut-and-Tie Model for Reinforced Concrete Deep Beams," PLOS ONE, Public Library of Science, vol. 10(6), pages 1-17, June.
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