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本文以实验为基础，建立了砂浆基体裂后钢纤维拔出韧性与纤维埋深的数学模型。并应用这一模型导出了纤维在不同埋深条件下，使平均拔出韧性达到最大时的“合理纤维长度”，由此解释了在同样纤维掺入率条件下，低强钢纤维混凝土比高强钢纤维混凝土具有较高的抗拉及抗弯韧性的原因。解决办法是采用相应的“合理纤维长度”和提高纤维极限抗拉强度。
Based on the experiment, this paper establishes a mathematical model for the pull-out toughness and fiber depth of the cracked steel fiber matrix. This model was used to derive the “reasonable fiber length” when the average pull-out toughness of the fiber is maximized under different depth conditions. This explains why the ratio of low-strength steel fiber concrete to high-strength fiber is the same under the same fiber incorporation rate. Steel fiber reinforced concrete has high tensile and flexural toughness. The solution is to use a “reasonable fiber length” and increase the ultimate tensile strength of the fiber.