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Experimental methodology on the serviceability behaviour of reinforced ultra-high performance fibre reinforced concrete tensile elements

机译：增强超高效纤维混凝土拉伸元件的可维修行为的实验方法

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摘要

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.
机译：设计代码包括用于压力，裂缝和混凝土结构的压力，裂缝和偏转控制的可维护性极限状态（SLS）规定，这可能限制结构设计。当绘制加强超高效纤维钢筋混凝土（R-UHPFRC）时，裂缝过程与传统混凝土的裂缝过程显着不同。因此，仍然不清楚传统规定是否适用于R-UHPFRC或应审查。单轴拉伸系列测试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的试验方法，用于研究R-UHPFRC在可维修条件下的行为，这使得通过使用不同的测量设备来研究全球和局部变形行为。测试了两种不同类型的具有变体纤维含量的R-UHPFRC系数。获得了全局平均拉伸应变曲线，开裂行为，数量和裂缝宽度。有希望的初步结果承认，该方法可能有助于提出SLS下R-UHPFRC的设计标准。

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