【摘要】 为分析小偏心钢筋混凝土柱受压性能的尺寸效应,对偏心距分别为0.1倍截面有效高度和0.25倍截面有效高度的2组几何相似的钢筋混凝土柱进行偏心受压破坏试验,柱截面几何尺寸分别为200mm×200mm,400mm×400mm,800mm×800mm,对比分析了其破坏形态、截面应变分布、承载力、变形能力,揭示了其尺寸效应规律。研究结果表明:小偏心钢筋混凝土柱的受压破坏形态和横截面应变分布规律基本相同,其尺寸效应不明显;承载力和变形能力存在明显尺寸效应,随着截面尺寸的增大,其安全储备降低,变形能力减弱。更多还原

【Abstract】 To analyze size effect of small eccentric concrete columns under compressive loads,two groups of reinforced concrete columns,whose eccentricities were 0.1and 0.25 times effective height of sections,were produced,and the specimen sizes were 200mm×200mm,400mm×400mm,800 mm ×800 mm respectively.Damage mode,sectional strain distribution,bearing capacity and deformability of reinforced concrete columns were compared to reveal the size effect law.The results show that the size has less effect on damage mode and the sectional strain distribution of columns,and the size effect laws on bearing capacity and deformability of columns are obvious.The safety storage and deformability of columns decrease with the size increasing.更多还原