【摘要】 为了解钢筋混凝土柱大偏心受压性能的尺寸效应,对2组不同偏心距的几何尺寸相似的钢筋混凝土柱进行了大偏心受压破坏试验,偏心距分别为0.6h0和0.9h0,截面几何尺寸分别为200 mm×200 mm、400 mm×400 mm、800 mm×800 mm.分析研究其破坏形态、承载力、截面应变分布规律、变形能力及曲率随尺寸变化的规律.研究结果表明:相同偏心距下,不同尺寸的钢筋混凝土柱大偏心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,其极限承载力与规范计算值的相对误差增大,变形能力减弱.更多还原

【Abstract】 To analyze size effect of concrete columns under large eccentric loading,two groups reinforced concrete columns were produced,the eccentricity were 0. 6h0 and 0. 9h0 respectively,and the specimen were 200 mm × 200 mm,400 mm × 400 mm,800 mm × 800 mm respectively. The authers studied damage characteristics,ultimate capacity,sectional strain properties,deformability and curvature of reinforced concrete columns with different size under the same eccentricity. The results show that the size has less effect on damage characteristics and the sectional strain properties of columns,and the size effect on ultimate capacity and deformability is obvious. The storage for capacity safety and the deformability of columns are decrease with the dimensions increasing.更多还原