Post-fire Seismic Behavior of RC Columns Built with Sustainable Concrete

ABSTRACT

In this study, four full-scale reinforced concrete columns were built replacing 50% of natural coarse aggregates in concrete mix by recycled aggregates. Three of the columns were exposed to standard ISO-834 fire for 30, 60 or 90 minutes, while the reference specimen was not exposed. Sixty days after fire exposure, the columns were tested under constant axial load and reversed cyclic lateral displacements simulating earthquakes. Test results are evaluated in terms of lateral load capacity, ductility, stiffness and energy dissipation. In addition, an analytical study was conducted to predict the lateral load-displacement response of fire-damaged columns built with recycled aggregates.

KEYWORDS:

• Column
• fire
• recycled aggregate
• reinforced concrete
• seismic
• sustainability

Acknowledgments

This research was supported by The Scientific and Technological Research Council of Turkey under grant number 216M535. The contribution of Prof. Mark F. Green to previous works of the authors is gratefully acknowledged. The authors are also thankful to the Yapı Merkezi Prefabrication Inc., Allianz Insurance Inc., Turk YTONG Inc., Fibrobeton Inc. as well as staff of ITU Structural and Earthquake Engineering, ITU Infrastructure Materials Laboratories, and Fire Laboratory at Turkish Standard Institute for their sponsorship and efforts.

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.

Additional information

Funding

This work was supported by the The Scientific and Technological Research Council of Turkey [216M535].