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Strengthening of non-seismically detailed reinforced concrete beam–column joints using SIFCON blocks

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Abstract

This article aims to propose a novel seismic strengthening technique for non-seismically detailed beam–column joints of existing reinforced concrete buildings, typical of the pre-1975 construction practice in Turkey. The technique is based on mounting pre-fabricated SIFCON composite corner and plate blocks on joints with anchorage rods. For the experimental part three 2/3 scale exterior beam–column joint specimens were tested under quasi-static cyclic loading. One of them was a control specimen with non-seismic details, and the remaining two with the same design properties were strengthened with composite blocks with different thickness and anchorage details. Results showed that the control specimen showed brittle shear failure at low drift levels, whereas in the strengthened specimens, plastic hinge formation moved away from column face allowing specimens to fail in flexure. The proposed technique greatly improved lateral strength, stiffness, energy dissipation, and ductility.

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Acknowledgements

The authors are thankful to Dokuz Eylul University for providing the research fund 2008.KB.FEN.006 and to Dr. Özgür Özçelik, Sadık C. Girgin, Dr. Turkay Baran and Materials Laboratory personnel for the support to carry out this study. Authors also would like to thank Dere Precast Concrete Ind. & Trade Co., Turkey for the support in the preparation of specimens.

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Authors and Affiliations

  1. Civil Engineering Department, Faculty of Engineering, Dokuz Eylul University, Buca 35160, Izmir, Turkey

    I S MISIR & S KAHRAMAN

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  1. I S MISIR
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  2. S KAHRAMAN
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Correspondence to I S MISIR.

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MISIR, I.S., KAHRAMAN, S. Strengthening of non-seismically detailed reinforced concrete beam–column joints using SIFCON blocks. Sadhana 38, 69–88 (2013). https://doi.org/10.1007/s12046-013-0127-3

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  • DOI: https://doi.org/10.1007/s12046-013-0127-3

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