Deterioration Analysis of Yield Strength and Its Probabilistic Model of Steel Bar Corroded by Chloride
Deterioration Analysis of Yield Strength and Its Probabilistic Model of Steel Bar Corroded by Chloride
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发表时间：
2011
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通讯作者：
Duan Jian-min
中科院分区：
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作者：
Duan Jian-min
Pitting phenomena of HRB335 grade steel bar in concrete corroded by chloride and its effect on mechanical performance were studied.The limitations of the current yield strength estimate method of tensile test were analyzed,and the nominal yield strength estimate method for the corroded HRB335 grade reinforcement was proposed,which is called yield point of pitting corrosion reinforcement(YPPCR)method. The numerical tensile test method of pitting reinforcements was established by combinations of the YPPCR method and the numerical analysis.Then the effects of pit dimensions on the nominal yield strength were analyzed,and the computational yield strength deterioration model of reinforcement with single pit was built consequently.At last,the yield strength deterioration of single pit reinforcements at different corrosion level were calculated and analyzed by probabilistic method.The probabilistic yield strength deterioration model relating to the corrosion ratio was established.
