Iskhakov Iakov, Frolov Ilya, Ribakov Yuri
Department of Civil Engineering, Ariel University, Ariel 40700, Israel.
Materials (Basel). 2022 Sep 1;15(17):6064. doi: 10.3390/ma15176064.
The theoretical stress-strain model for compressed composite cement materials' behavior without empirical coefficients was proposed by Iskhakov in 2018. This model includes the following main parameters describing concrete behavior: stresses and strains corresponding to the border between the elastic and non-elastic behavior stages of a concrete specimen, ultimate elastic strains, and stresses and strains at the end of the post-peak region. Particular attention is focused on the descending branch of the stress-strain diagram, as well as on the analysis of concrete elastic and plastic potentials. These potentials are important for assessing the dynamic response of the concrete element section, as well as for concrete creep analysis. The present research is aimed at experimental verification of the above-mentioned theoretical model. The obtained experimental results are in good agreement with the theoretical ones, which confirms the model's accuracy and enables a significant reduction in the empirical coefficients number in compressed reinforced concrete elements design. This, in turn, represents the scientific novelty of this study.
伊斯哈科夫在2018年提出了无经验系数的压缩复合水泥材料行为的理论应力-应变模型。该模型包括以下描述混凝土行为的主要参数：混凝土试件弹性和非弹性行为阶段边界对应的应力和应变、极限弹性应变以及峰值后区域末端的应力和应变。特别关注应力-应变图的下降分支，以及混凝土弹性和塑性势的分析。这些势对于评估混凝土构件截面的动态响应以及混凝土徐变分析很重要。本研究旨在对上述理论模型进行实验验证。获得的实验结果与理论结果吻合良好，这证实了模型的准确性，并能够显著减少压缩钢筋混凝土构件设计中的经验系数数量。反过来，这也体现了本研究的科学新颖性。
