论文部分内容阅读
研究钢管高性能混凝土轴压短柱中钢管和混凝土的应力、应变等的分布规律,发现圆试件中截面混凝土纵向应力在圆周方向均匀分布,而方试件中截面混凝土的纵向应力在弯角处最大。试件在受荷过程中,中截面钢管首先屈服,然后逐渐向试件两端发展。典型算例的分析结果表明,圆钢管对混凝土的约束作用好于方钢管的,圆钢管对混凝土沿圆周方向均匀约束,而方试件在截面弯角处的约束力最大。所有试件在中截面约束力最大。黏结强度对于试件的轴压承载力基本没有影响。普通钢管混凝土轴压短柱的承载力计算式同样适用于钢管高性能混凝土轴压短柱的承载力计算。钢管高性能混凝土轴压短柱与普通钢管混凝土轴压短柱在静力性能方面并无本质区别。
The distribution law of stress and strain of steel tube and concrete in axial compression short column of high-performance concrete-filled steel tube was studied. It was found that the longitudinal stress of concrete in circular specimen was uniformly distributed in the circumferential direction, while the longitudinal stress of concrete in the square specimen was about Department of the largest. During the loading process of the specimen, the cross-section steel tube firstly yields and then gradually develops to both ends of the specimen. The analysis results of typical examples show that the confining effect of the round steel tube on the concrete is better than that of the square steel tube. The round steel tube is uniformly constrained to the concrete in the circumferential direction, while the square specimen has the highest binding force at the corner of the section. All specimens in the cross section of the binding. The bond strength has no effect on the axial compressive bearing capacity of specimens. The calculation formula of bearing capacity of common CFST short columns is also suitable for the calculation of bearing capacity of high-performance concrete axial compression short columns. There is no essential difference in the static performance between the high-performance concrete axial compression short columns and ordinary CFST columns.