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研究了0%,50%和100%的3种再生骨料替代率下,再生混凝土的基本物理和力学性能,分析了钢骨再生混凝土短柱的高温性能及其加固行为,得到了不同再生骨料替代率、不同温度和CFRP加固下钢骨再生混凝土的承载力、位移和应变响应,建立了高温后(500℃)钢骨再生混凝土短柱弹性模量和抗压强度之间的理论关系。结果表明:在CFRP加固下,替代率为50%的试件具有最大的承载力,温度升高,试件承载力急剧降低,而CFRP加固能有效提高试件的承载力、刚度,延性有所降低,其破坏模式比未加固试件有明显改变。
The basic physical and mechanical properties of recycled concrete under 0, 50% and 100% replacement rates of recycled aggregate concrete were studied. The high temperature performance and its reinforcement behavior of recycled steel reinforced concrete short columns were analyzed. Different regenerated bone The relationship between the elastic modulus and the compressive strength of SRC columns after high temperature (500 ℃) was established based on the bearing capacity, displacement and strain response of the SRC reinforced with different temperature, material replacement rate, different temperature and CFRP. The results show that under the CFRP reinforcement, the specimen with the substitution rate of 50% has the largest bearing capacity, the temperature increases rapidly and the bearing capacity of the specimen decreases sharply. However, the CFRP reinforcement can effectively increase the bearing capacity, rigidity and ductility of the specimen Decreased, the failure mode than the unconfined specimens have significantly changed.