自密实混凝土浇筑钢筋柱的性能研究

M. Sonebi, P. Bartos
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引用次数: 16

摘要

本文比较了采用普通混凝土和自密实(SCC)混凝土浇筑的全尺寸(300 x 300 x 3000 mm)柱的结构性能,箍筋配置代表不同程度的约束。采用抗压强度分别为35mpa(房屋)和60mpa(土木工程)的SCC混凝土和普通混凝土共浇筑8根柱。两对柱采用普通混凝土和SCC浇筑。对每一对配筋柱,一根柱进行单轴压缩试验,确定其承载能力,另一根柱进行岩心取样,确定原位抗压强度沿高度的分布。将核心结果与在标准条件下(水)和空气中固化的对照立方体的强度进行了比较。一般情况下,混凝土的原位抗压强度或SCC比普通混凝土更接近标准立方体强度。结果表明,与普通混凝土相比,SCC混凝土的原位性能分布更为均匀。本文还比较了混凝土的抗压强度和延性与普通混凝土的3米柱试验结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Performance of Reinforced Columns Cast with Self-Compacting Concrete
This paper compares the structural performance of full-scale (300 x 300 x 3000 mm) columns cast using ordinary concrete and self-compacting (SCC) concretes with stirrup configurations representing different degrees of confinement. SCC and ordinary concretes having compressive strengths of 35 MPa (housing) and 60 MPa (civil engineering) were used to cast a total of eight columns. Two pairs of columns were cast using ordinary concrete and SCC. For each pair of the reinforced columns, one column was tested in uniaxial compression to determine its load carrying capacity, while the other one was used to take core samples to determine the distribution of in-situ compressive strengths along its height. The core results were compared to strengths determined on control cubes cured in standard conditions (water) and in air. In general, the in-situ compressive strengths or SCC were closer to standard cube strength than those of ordinary concrete. The distribution of in-situ properties was found to be more uniform in the case of SCC than that of the ordinary concrete. The compressive strength and the ductility of SCC and the ordinary concrete obtained from the 3-m column tests are also compared in this paper.
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