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为揭示钢筋混凝土偏心受压柱的力学性能随尺寸的变化规律,在5组不同偏心距、3种截面尺寸为(200×200)mm、(400×400)mm、(800×800)mm的钢筋混凝土柱偏心受压试验数据基础上,对比分析了试件几何尺寸及偏心距对破坏形态、承载力、峰值荷载下混凝土及钢筋应变、弯矩、变形能力的影响。结果表明:试件的屈服及峰值承载力均随偏心距的增大而减小,且峰值承载力随尺寸的增大而减小;峰值荷载下,混凝土应变随偏心距的增大而减小,钢筋应变随偏心距的增大而增大,且两者应变均随尺寸的增大而减小;试件的变形能力随偏心距的增大而减少,尺寸越大,延性越差。
In order to reveal the variation of the mechanical properties of the eccentric loaded column with the size, five different eccentric distances, three kinds of sectional dimensions of (200 × 200) mm, (400 × 400) mm, (800 × 800) mm On the basis of eccentric compression test data of reinforced concrete columns, the influences of geometrical dimensions and eccentricity of test pieces on the strain, bending moment and deformation capacity of concrete and steel bars under failure mode, bearing capacity and peak load were analyzed. The results show that the yield and peak capacity decrease with the increase of eccentricity, and the peak bearing capacity decreases with the increase of size. Under the peak load, the strain of concrete decreases with the increase of eccentricity , The strain of steel increases with the increase of eccentricity, and the strain of both decreases with the increase of the size. The deformation capacity of specimen decreases with the increase of eccentricity. The larger the size, the worse the ductility.