Steel and Composite Structures

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Optimum distribution of steel frame assembly for seismic retrofit of framed structures

  • Michael Adane (Department of Global Smart City, Sungkyunkwan University) ;
  • Seungho Chun (Department of Global Smart City, Sungkyunkwan University) ;
  • Jinkoo Kim (Department of Global Smart City, Sungkyunkwan University)
  • Received : 2022.04.17
  • Accepted : 2024.01.18
  • Published : 2024.02.10
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Abstract

This research proposed a particle swarm optimization (PSO) based seismic retrofit design of moment frame structures using a steel frame assembly. Two full scale specimens of the steel frame assembly with different corner details were attached to one-story RC frames for seismic retrofit, and the lateral load resisting capacities of the retrofitted frames subjected to cyclic loads were compared with those of a bare RC frame. The open source software framework Opensees was used to develop an analytical model for validating the experimental results. The developed analytical model and the optimization scheme were applied to a case study structure for economic seismic retrofit design, and its seismic performance was assessed before and after the retrofit. The results show that the developed steel frame assembly was effective in increasing seismic load resisting capability of the structure, and the PSO algorithm could be applied as convenient optimization tool for seismic retrofit design of structures.

Keywords

Acknowledgement

This research was carried out by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2021R1A2C2006631).

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