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Computers and Concrete
  Volume 27, Number 4, April 2021 , pages 343-353
DOI: https://doi.org/10.12989/cac.2021.27.4.343
 


Seismic performance improvement of RC buildings with external steel frames
Ali Serdar Ecemis, Hasan Husnu Korkmaz and Yunus Dere

 
Abstract
    In this study, in order to improve the seismic performance of existing reinforced concrete (RC) framed structures, various external attachment of corner steel frame configurations was considered as a user-friendly retrofitting method. The external steel frame is designed to contribute to the lateral stiffness and load carrying capacity of the existing RC structure. A six story building was taken into account. Four different external corner steel frame configurations were suggested in order to strengthen the building. The 3D models of the building with suggested retrofitting steel frames were developed within ABAQUS environment using solid finite elements and analyzed under horizontal loadings nonlinearly. Horizontal top displacement vs loading curves were obtained to determine the overall performance of the building. Contributions of steel and RC frames to the carried loads were computed individually. Load/capacity ratios for the ground floor columns were presented. In the study, 3D rendered images of the building with the suggested retrofits are created to better visualize the real effect of the retrofit on the final appearance of the façade of the building. The analysis results have shown that the proposed external steel frame retrofit configurations increased the lateral load carrying capacity and lateral stiffness and can be used to improve the seismic performance of RC framed buildings.
 
Key Words
    strengthening; external; steel frame; reinforced concrete; non-linear analysis
 
Address
Ali Serdar Ecemis: Civil Engineering Department, Necmettin Erbakan University, Konya, Turkey
Hasan Husnu Korkmaz: Civil Engineering Department, Necmettin Erbakan University, Konya, Turkey
Yunus Dere: Civil Engineering Department, Necmettin Erbakan University, Konya, Turkey
 

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