| Recycled aggregate concrete-filled square steel tube column give full play to the advantages of concrete-filled square steel tube and recycled aggregate concrete. With the advantages of high bearing capacity, good plasticity and toughness, convenient installation, better fire resistance and economic effect, and energy conservation and environment protection, it will promote the sustainable development of construction industry. Few research of recycled aggregate concrete-filled square steel tube has been reported, which this article studied promoted the study of mechanical properties and apply, provided the basis for reinforcement of post-disaster assessment.This article described the failure mode of test specimens during the load process, on the basis of44axial compression test data, took the influence of replacement rate, maximum temperature of experienced, concrete strength, sectional dimension and soak time on the mechanical properties of the specimens into account. And analyzed the impact on peak load, peak strain, ductility, energy dissipation, on the basis of9bias specimens test data, took the influence of replacement rate, maximum temperature of experienced into account. And analyzed the impact on peak load, midspan deflection, axial displacement.The analysis results has shown:the factors affecting are arranged by the impact effect, order from big to small, maximum temperature of experienced, replace rate, concrete strength and sectional dimension. When the temperature exceed400℃,the bearing capacity of recycled aggregate concrete specimens lower than commen concrete specimens specially.Based on the experimental results and related literature, calculated the bearing capacity of axial compression and bias specimen, the axial compression regulation of DBJ13-51-2003and GJB4142-2001, the bias compression regulation of GJB4142-2001, are in good agreement with the experimental date. |
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