目前，许多国家都开始了对圆钢管混凝土构件的强度和性能的研究，但对变轴力下圆钢管混凝土支撑滞回性能研究还较少。
The study on the strength and performance of circular CFST have been carried in many countries, but research on the hysteretic behavior of circular CFST under variable axial force is very limited.
目前，许多国家都开始了对圆钢管混凝土构件的强度和性能的研究，但对变轴力下圆钢管混凝土支撑滞回性能研究还较少。
The study on the strength and performance of circular CFST have been carried in many countries, but research on the hysteretic behavior of circular CFST under variable axial force is very limited.
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