Design codes include serviceability limit state (SLS) provisions for stress, crack, and deflection control in concrete structures, which may limit the structural design. When drawing on reinforced ultra‐high performance fibre‐reinforced concrete (R‐UHPFRC), the process of cracking differs significantly from traditional concretes. Thus, it remains unclear whether the traditional provisions are applicable to R‐UHPFRC or should be reviewed. Uniaxial tensile tie test is an excellent option to analyse and review these criteria. This work proposes a novel test methodology to study the behaviour of R‐UHPFRC under serviceability conditions, which lets the study of the global and local deformation behaviour by using different measurement equipment. Two different types of R‐UHPFRC ties with variant fibre content were tested. The global average tensile stress–strain curve, cracking behaviour, number, and width of cracks were obtained. Promising preliminary results admitted that this methodology can be useful to propose design criteria of R‐UHPFRC under SLS.

中文翻译：

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增强超高性能纤维混凝土抗拉元件使用寿命特性的试验方法

设计规范包括对混凝土结构中的应力，裂缝和挠度控制的适用性极限状态（SLS）规定，这可能会限制结构设计。当使用增强的超高性能纤维增强混凝土（R-UHPFRC）时，开裂过程与传统混凝土明显不同。因此，目前尚不清楚传统规定是否适用于R-UHPFRC或应予以审查。单轴抗拉试验是分析和审查这些标准的绝佳选择。这项工作提出了一种新颖的测试方法，以研究R‐UHPFRC在可使用性条件下的行为，从而可以使用不同的测量设备来研究整体和局部变形行为。测试了两种具有不同纤维含量的R‐UHPFRC扎带。获得了全球平均拉应力-应变曲线，开裂行为，裂纹数量和宽度。有希望的初步结果承认，该方法可用于提出SLS下R‐UHPFRC的设计标准。