基于断裂理论的FRHPC破坏概率模型

发布时间：2018-05-27 08:29

  本文选题：抗压强度 + 分形维数　； 参考：《建筑材料学报》2017年04期

【摘要】：为定量描述纤维增强高性能混凝土(FRHPC)的破坏过程及机理,运用断裂力学理论并引入孔隙分形维数,在测试了25组不同水胶比、不同养护制度试件的抗压强度、孔结构参数的基础上,建立了FRHPC的破坏概率模型.该模型不仅考虑了孔隙分形维数对基体裂缝复杂程度的影响,还考虑了纤维增强系数对基体失效概率的影响.模型回归分析结果表明:根据该模型计算的FRHPC破坏概率与破坏概率试验值有较高相关性,为定量表征FRHPC的破坏过程及机理分析提供了一种全新的视角和思路,也从侧面验证了模型的科学性与实用性.
[Abstract]:In order to describe quantitatively the failure process and mechanism of fiber reinforced high performance concrete (FRHPC), the compressive strength of 25 groups of specimens with different water / binder ratio and different curing system was tested by using fracture mechanics theory and introducing pore fractal dimension. Based on the pore structure parameters, the failure probability model of FRHPC is established. The model not only considers the influence of fractal dimension of pore on the fracture complexity of matrix, but also considers the influence of fiber reinforcement coefficient on the failure probability of matrix. The results of regression analysis show that the failure probability of FRHPC calculated by the model has a high correlation with the test value of the failure probability, which provides a new perspective and train of thought for quantificationally characterizing the damage process and mechanism of FRHPC. It also verifies the scientific nature and practicability of the model from the side.
【作者单位】： 内蒙古工业大学土木工程学院;
【基金】：国家自然科学基金资助项目(11362013,51468049) 内蒙古工业大学基金资助项目(ZD201610)
【分类号】：TU528.572
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本文编号：1941253