中文摘要：

为研究FRP-混凝土-钢双壁空心管柱的抗震性能,完成了9根双壁空心管柱试件和4根混凝土-钢空心管柱对比试件在定轴力和往复水平力作用下的试验。双壁空心管柱试件有3种破坏形态：内层钢管受拉屈服,混凝土压坏;内层钢管未受拉屈服,混凝土压坏或塑性铰区FRP管出现多条树脂受压剪切裂缝;塑性铰区FRP管压屈。试验过程中,发现：增大纤维特征值,试件的变形能力增大;加大轴压比,承载能力有所提高,但变形能力下降;空心率为0.6和0.74时,其承载能力和变形能力分别相差不大;FRP管的纤维缠绕角度为80°时,轴压力加载方式对试件承载能力和变形能力的影响不大;纤维缠绕角度为60°时,轴压力加载方式对试件的承载能力影响不大,但对变形能力有所影响。结果表明,由于FRP的约束作用,双壁空心管柱试件的承载能力大于混凝土-钢空心管柱试件,变形能力和耗能能力显著大于对比试件。

英文摘要：

To study the seismic behavior of FRP-concrete-steel double-skin tubular columns（DSTCs）,tests are conducted on 9 DSTC specimens and 4 concrete-steel tubular column specimens under constant axial load and cyclic lateral load.The test results indicate that because of the confinement of FRP,the load-carrying capacity of DSTC specimens is larger than that of concrete-steel tubular specimens,and the deformation capacity and energy dissipation capacity of DSTC specimens are much larger than those of concrete-steel tubular specimens.Three failure modes of DSTC specimens can be classified.Increase in the fiber characteristic value results in remarkable increase of the deformation capacity of specimens.Increase in the axial force ratio cause little increase in the strength capacity of DSTC specimens,but the induced decrease in the deformation capacity is significant.The section void ratios of 0.74 and 0.6 have little influence on the load-carrying capacity and deformation capacity of the specimens.The axial force loading method has little influence on the strength capacity and deformation capacity of the specimens if the fiber of FRP tube is orientated at 80°,its influence on the strength capacity is insignificant,whereas its influence on the deformation capacity is obvious if the fiber is orientated at 60°.