本文通过对6根短柱,包括2根钢管钢纤维自密实混凝土短柱、1根钢管自应力自密实混凝土短柱、1根钢管自密实混凝土短柱和2根钢管钢纤维自应力自密实混凝土短柱的轴心受压试验,分析初始自应力和钢纤维体积掺量对钢管钢纤维自应力自密实混凝土轴心受压短柱力学性能的影响.结果表明,初始自应力将显著提高短柱的承载力和刚度,但会导致其变形能力明显下降;掺入钢纤维可缓解自应力引起的变形能力的下降,并改善钢管对混凝土的约束作用.%Six short columns, including two steel tube short columns filled with steel fiber reinforced self-compacting concrete, one steel tube short columns filled with self-stressing and self-compacting concrete , one steel tube short columns filled with self-compacting concrete and two steel tube short columns filled with steel fiber reinforced self-stressing and self-compacting concrete, were concentrically loaded to failure. The variables investigated are self-stress and steel fiber volume percentage. The results indicated that the self-stress can significant enhance the load carrying capacity of the specimens, but lead to obvious decrease of their deformability. Adding steel fiber not only relieves the decrease of deformability caused by self-stressing, but also effectively improves the confinement of steel tube to concrete.
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