中空夹层钢管混凝土在传统钢管混凝土基础上改进，使得钢管混凝土的抗弯刚度大，自重轻，耐火性能更好。

Concrete-filled double skin steel tube columns, which have more bending rigidity and fire resistance, but have less weight, are an amelioration of traditional concrete-filled steel tube colums.

youdao

中空夹层钢管混凝土在传统钢管混凝土基础上改进，使得钢管混凝土的抗弯刚度大，自重轻，耐火性能更好。

Concrete-filled double skin steel tube columns, which have more bending rigidity and fire resistance, but have less weight, are an amelioration of traditional concrete-filled steel tube colums.

youdao