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Experimental Study of Reinforced Concrete Eccentric Compression Columns with HRBF400 Steel Bars

Nine concrete columns reinforced with fine grain high steel bars under eccentric loading were tested to study the effects of experimental parameters, such as eccentricity distance, reinforcement ratio and concrete strength, on the failure pattern, the strain distribution and the lateral deformation. The experimental results indicate that the columns reinforced by fine grain high steel bars work harmonically with concrete, and the strength of fine grain steel bars could be utilized fully. Finally, the design value of 400MPa fine grain steel bar is 360MPa in column was proposed based on the experiment and the comprehensive theoretical analysis.