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通过实、空心钢管再生混凝土试件的冻融循环试验,研究了实、空心钢管再生混凝土的抗冻耐久性能,并用有限元软件模拟了该试验。研究表明,冻融对空心钢管再生混凝土弹性模量影响较大,对实心钢管再生混凝土弹性模量影响较小;混凝土吸水饱和对空心钢管再生混凝土冻胀变形影响不大,对实心钢管再生混凝土冻胀变形影响较大;温度改变产生的紧箍力对钢管混凝土的影响很小。
Through the freeze-thaw cycle test of recycled concrete specimens of solid and hollow steel tubes, the freeze-thaw durability of recycled concrete filled with hollow concrete and hollow steel tubes was studied. The experiment was simulated by finite element software. The results show that the freeze-thaw has a great influence on the elastic modulus of recycled concrete of hollow steel tube, and has little effect on the elastic modulus of recycled concrete of solid steel tube. The water saturation of concrete has little effect on the frost heave deformation of recycled concrete of hollow- Expansion deformation is more significant; the influence of the confining force caused by temperature change has little effect on CFST.