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研究钢管高性能混凝土受弯构件中钢管和混凝土应力、应变等的分布规律。对钢管与混凝土相互作用力的研究表明,圆钢管对混凝土有很好的约束作用,方试件的相互作用力主要集中在弯角区域,平板区域的相互作用力很小。黏结强度对于试件的弯矩-曲率曲线基本没有影响。普通钢管混凝土受弯构件的承载力计算式同样适用于钢管高性能混凝土受弯构件的承载力计算。钢管高性能混凝土受弯构件与普通钢管混凝土受弯构件在静力性能方面并无本质区别。
The distribution of stress and strain of steel pipe and concrete in flexural members of high performance concrete filled steel tubular (CFST) is studied. The research on the interaction force between steel pipe and concrete shows that the round steel pipe has a good restraining effect on the concrete. The interaction force of the test piece mainly concentrates in the corner area, and the interaction force in the plate area is very small. The bond strength has no effect on the moment-curvature curve of the specimen. The calculation formula of bearing capacity of ordinary CFST members is also suitable for the calculation of bearing capacity of high-performance concrete flexural members. There is no essential difference in the static performance between the steel tube high-performance concrete flexural members and ordinary CFST flexural members.