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中文摘要：
以空心率为变化参数，对5个纯弯构件进行试验研究，同时考察圆中空夹层钢管混凝土在纯弯状态下的力学性能。在确定了钢材和混凝土应力-应变关系模型的基础上，利用数值方法对圆中空夹层钢管混凝土纯弯构件进行分析，分析结果和试验结果吻合较好。最后在参数分析的基础上，提出构件抗弯承载力的简化计算公式。
英文摘要：
A total of five specimens were tested under pure bending to investigate the behavior of concrete filled double-skin steel tubular （CFDST） beams. The specimens were fabricated with circular hollow section （CHS） as outer and inner skins. The parameters varied in the tests were hollow section ratio. Utilizing the stress-strain relations of steel and concrete presented in concrete filled circular steel tubes, a numerical method is used for the analysis of load-deformation cunes of the double-skin composite members subjected to pure bending. The calculated results agree well with those of tests. A simplified model is also developed for calculating the bearing capacities of the CFDST beams.
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