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为配合辽宁省地方标准《钢管混凝土结构技术规程》的编制,对钢管高性能混凝土压弯构件中钢管和混凝土应力、应变等的分布规律展开研究。对钢管与混凝土相互作用力的研究表明,圆试件受压区的约束力较大,方试件钢管角部区域的相互作用力最大。所有试件中截面受压区的相互作用力最大。黏结强度和加载路径对钢管高性能混凝土压弯构件的静力性能影响都不大。普通钢管混凝土压弯构件的承载力计算式同样适用于钢管高性能混凝土压弯构件的承载力计算。钢管高性能混凝土压弯构件与普通钢管混凝土压弯构件在静力性能方面并无本质区别。
In order to cooperate with the preparation of Liaoning Province local standard “CFST Technical Code”, the distribution rules of stress and strain of steel pipe and concrete in high performance concrete-filled CFST members are studied. The research on the interaction force between steel pipe and concrete shows that the constraining force of the compression zone of the circular specimen is larger and the interaction force of the square steel pipe of the test specimen is the largest. The cross-section compression zone has the largest interaction force among all specimens. The bond strength and loading path have little effect on the static performance of high-performance concrete CFST members. The calculation formula of bearing capacity of ordinary CFST members is also suitable for the calculation of bearing capacity of high-performance concrete CFST members. There is no essential difference in the static performance between the high-performance concrete-filled steel tubular members and ordinary CFST members.