...极限拉应变[gap=987]； confined concrete； model test； composite shaft lining of inner steel cylinder； limit of tensile strain...
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The ultimate tensile strain is meaning the biggest strain at the time that concrete destroy. It's a important factor of concrete's cracking.
混凝土极限拉应变是指混凝土受拉断裂前所能承受的最大拉应变,它是影响混凝土开裂的重要因素之一。
参考来源 - 高强耐磨水泥混凝土抗裂及断裂性能的试验研究·2,447,543篇论文数据，部分数据来源于NoteExpress
选用的塑料纤维应具有不同的极限拉应变和弹性模量，纤维可以为碳纤维、芳纶纤维、玻璃纤维等。
The plastic fiber selected has different ultimate tensile strain and elastic modulus, and the fiber can be carbon fiber, aramid fiber, glass fiber and the like.
针对混凝土构件材料强度和变形性质的随机性，采用数学方法提出构造混凝土极限拉应变数列的原理。
Considering the randomness of strength and deformation of concrete material, a mathematic approach of producing random variables series of concrete ultimate tensile strain is proposed.
同时，根据本文试验结果、已有试验结果和国内外设计规范（规程）给出了碳纤维布的容许极限拉应变的建议表达式。
Simultaneously, the propositional expression of allowable ultimate strain of CFRP was given based on the author's and the existing experiments.
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