It is well known that the inclusion of steel fibres into a concrete matrix has the potential to improve both the serviceability and strength characteristics of reinforced concrete. As a result of decades of academic interest into the material, design provisions for flexural strength, shear strength and short-term serviceability have been incorporated into international codes of practice. However, available design guidelines typically contain little or no guidance for engineers to confidently predict the long-term behaviour of structures manufactured with steel fibre reinforced concrete (SFRC). This limits the full utilization of the material in design practice. This paper presents a simplified model, suitable for design, that can reliably predict the effects of creep and shrinkage in SFRC members containing conventional reinforcement which are subjected to a sustained in-service flexural load. Predictions of the proposed model are compared to available data in the literature and are shown to correlate well.

中文翻译：

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简化预测 SFRC 受弯构件随时间变化的挠度

众所周知，在混凝土基体中加入钢纤维有可能提高钢筋混凝土的使用性能和强度特性。由于数十年来对该材料的学术兴趣，弯曲强度、剪切强度和短期适用性的设计规定已被纳入国际实践规范。然而，可用的设计指南通常很少或根本没有指导工程师自信地预测用钢纤维混凝土 (SFRC) 制造的结构的长期行为。这限制了材料在设计实践中的充分利用。本文提出了一个简化的模型，适用于设计，可以可靠地预测包含常规钢筋的 SFRC 构件中的蠕变和收缩的影响，这些构件承受持续的服役弯曲载荷。将所提出模型的预测与文献中的可用数据进行比较，并显示出相关性很好。