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Seismic Performance Assessment of a Soft-Storey RC Building Retrofitted with Steel Bracing, RC Jacketing, and RC Shear Wall

Authors

  • Rohit Singh Patel National Institute of Technology Patna, India
  • Ajay Kumar Sinha Department of Civil Engineering, National Institute of Technology, Patna, India
Volume: 15 | Issue: 6 | Pages: 28732-28737 | December 2025 | https://doi.org/10.48084/etasr.13775

Received: 1 August 2025 | Revised: 23 August 2025 | Accepted: 30 August 2025 | Online: 7 October 2025


Corresponding author: Rohit Singh Patel

Abstract

Reinforced concrete (RC) structures in developing countries, such as India, had been constructed prior to the application of modern seismic codes and are vulnerable to earthquakes. Retrofitting must be performed to prevent deformation during seismic activity. This study focuses on the comparative evaluation of three retrofitting techniques, including steel bracing, RC column jacketing, and RC shear walls. These techniques are applied to a representative four-storey RC frame building located in Seismic Zone IV of India. Nonlinear static pushover and dynamic time-history analysis are performed to evaluate the structure and its seismic response prior to and after retrofitting. The evaluation metrics include the base shear capacity, inter-storey drift ratio, ductility, and stiffness. Specifically, the results indicate that all strategies improved the structural performance under seismic loading. RC infill shear walls demonstrated the most significant improvements in the base shear and drift reduction components.  Steel bracing offered a balanced enhancement in strength and deformability. RC jacketing effectively strengthened ground-storey columns with a moderate overall impact.

Keywords:

seismic retrofitting, soft storey, steel bracing, Rc column jacketing, Rc shear wall

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References

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How to Cite

[1]
R. S. Patel and A. K. Sinha, “Seismic Performance Assessment of a Soft-Storey RC Building Retrofitted with Steel Bracing, RC Jacketing, and RC Shear Wall”, Eng. Technol. Appl. Sci. Res., vol. 15, no. 6, pp. 28732–28737, Dec. 2025.

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