不同加劲肋钢管无水泥混凝土短柱轴压试验

Axial compression test of cemented concrete short columns with different stiffened steel tubes

为改善薄壁钢管混凝土的力学性能,研究了不同加劲肋形式变化下,对无熟料水泥再生薄壁钢管混凝土短柱的轴压性能的影响。试验表明:有加劲肋的钢管柱比无加劲肋的钢管柱抵抗轴压的能力更强;单肋带垫片的加劲肋形式试验结果并未比单肋形式的极限荷载高;加劲肋形式为双肋的抗压强度最高。无水泥混凝土钢管柱的破坏形式与普通混凝土一致。

In order to improve the mechanical properties of thin-walled Concrete-Filled Steel Tube（CFST）,the effects of different types of stiffeners on the axial compression performance of the thin-walled steel tube reinforced concrete column without clinker were studied. Tests have shown that steel columns with stiffened ribs are more resistant to axial compression than steel tubes without stiffened ribs; the test results for single ribbed stiffeners are not higher than the ultimate loads in the form of single ribs; the stiffeners are in the form of double ribs have the highest compressive strength. The failure mode of concrete-free concrete columns coincides with that of ordinary concrete.