摘   要：采用ABAQUS有限元软件计算分析了钢管自应力混凝土纯弯构件的力学性能，并作了试验验证，在此基础上，分析了钢管自应力混凝土纯弯构件受力过程中的弯矩-挠度关系以及钢管和混凝土间的相互作用。讨论了在初始自应力影响下，钢管自应力混凝土的力学性能。结果表明，在相同条件下，钢管自应力混凝土比普通钢管混凝土的纵向应力分布更加均匀，弹性工作阶段有所增长，抗弯承载力也得到了提高，但当自应力水平达到某一数值后，抗弯承载力有一定程度的下降。

Abstract：The flexural behavior of self-stressing concrete-filled steel tube under pure bending are carried out by using ABAQUS finite element software. The calculated results are verified by test data, and reasonable agreement is demonstrated. On this basis, the moment-deflection curve and the composite action between the steel tube and concrete are analyzed, and the influence of initial stress on the mechanical behavior of self-stressing concrete filled steel tube is also discussed. The results show that compared with concrete filled steel tube under the same conditions, the concrete longitudinal stress distribution of self-stressing concrete-filled steel tube is more uniform, both the elastic stage and the flexural capacity are also improved, but when the self-stress reaches a certain value, the flexural capacity has a certain degree of decline.钢管自应力混凝土构件；抗弯性能；ABAQUS有限元软件；纯弯力学性能