An Experimental Study on the Seismic Behavior of Recycled Concrete Short Columns with Different Stirrup Ratio

Abstract:

A comparative study is conducted on the seismic behaviors of five 1/2 scale recycled concrete short columns with 1.75 shear span ratios. The stirrup ratio in the specimens was changed from 0.4%, 0.9%, to 1.29% while the ratio of their longitudinal reinforcement was the same. Crossed reinforcing bars were set in two of the specimens. Cyclic loading test was carried out for the specimens under axial compression ratio 0.4. The stiffness and its degradation, load-carrying capacity, ductility, hysteretic behavior, energy dissipation and failure phenomena of each short column were analyzed. Results show that, with the increase of the stirrup ratio in the specimens, the shear failure of the specimens is getting lighter and lighter. And the load-carrying capacity, ductility, energy dissipation capacity are improved greatly, but the rate of the increase is tending to slow. Moreover, crossed reinforcing bars in the short columns are able to improve the seismic behavior. Recycled concrete can be used for structural columns with low axial compression ratio in earthquake area.

• Periodical: Applied Mechanics and Materials (Volumes 256-259)
• Pages: 942-948
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.256-259.942
• Online since: December 2012
• Authors: Wan Lin Cao, Hong Ying Dong, Jian Wei Zhang
• Keywords: Crossed Reinforcing Bars, Experimental Study, Recycled Concrete (RC), Seismic Behavior, Short Column

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