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通过试验,研究了再生骨料取代率、应力水平及矿渣掺和料对再生混凝土徐变度的影响规律。结果表明,再生粗骨料的掺加可降低再生混凝土的徐变度。随着再生细骨料的增加,徐变度总体表现为增加。随着应力水平的增加,徐变度增加。矿渣可明显降低再生混凝土徐变度。结合试验数据,根据模拟退火原理,建立约束优化模型,进行再生混凝土徐变度公式的参数识别,结果表明该方法编程简单,稳定性好,所得参数与试验数据吻合较好,计算精度较高,适用于类似问题的多参数识别。
Through experiments, the influence of recycled aggregate substitution rate, stress level and slag admixture on the creep degree of recycled concrete was studied. The results show that the incorporation of recycled coarse aggregate can reduce the creep of recycled concrete. As the regenerated fine aggregate increases, the overall creep performance increases. As the stress level increases, creep increases. Slag can significantly reduce the creep of recycled concrete. Combined with the experimental data, according to the simulated annealing principle, a constrained optimization model is established to identify the parameters of the creep formula of recycled concrete. The results show that the method is simple in programming and good in stability. The obtained parameters are in good agreement with the experimental data, Suitable for multi-parameter identification of similar problems.