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首页> 外文期刊>Magazine of Concrete Research >Assessment of SFRC flat slab punching behaviour - part Ⅰ: monotonic vertical loading
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Assessment of SFRC flat slab punching behaviour - part Ⅰ: monotonic vertical loading

机译：SFRC平板冲孔性能的评估-第一部分：单调垂直载荷

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摘要

This paper presents a study of the behaviour and load capacity of steel-fibre-reinforced concrete (SFRC) flat slabs under monotonically increased concentrated vertical loads. The SFRC was used only in the local region of the slab-column connection, as the rest of the slab was cast using normal concrete without fibres. The six experimental test specimens had a thickness of 150 mm with different longitudinal reinforcement ratios, using a non-uniform distribution over the slab width. The concretes used were made with different Dramix 4D 65/60 BG steel fibre contents (0, 0.5, 0.75 and 1.0% volume content). The slab tests were complemented by flexural tests on notched beams. This made it possible to determine the tension behaviour of the different concretes used, through a linear post-cracking behaviour and inverse analysis. The inverse analysis made it possible to define the stress-crack opening relationship that characterises the tension behaviour of SFRC and to relate it to the observed behaviour and load capacity of the tested slabs. The tests results show that the tensile behaviour of the SFRC plays an important role in the behavioural and load capacity of the slabs and that it can be considered relevant to physically based models.
机译：本文研究了在单调增加的集中垂直荷载下钢纤维增强混凝土（SFRC）平板的性能和承载能力。 SFRC仅用于板-柱连接的局部区域，因为其余板是使用不含纤维的普通混凝土浇铸的。六个实验试样的厚度为150毫米，具有不同的纵向增强比，并且在板坯宽度上分布不均匀。所使用的混凝土是用不同的Dramix 4D 65/60 BG钢纤维含量（0、0.5、0.75和1.0％的体积含量）制成的。平板测试通过缺口梁的弯曲测试得到补充。这样就可以通过线性的后开裂行为和反分析来确定所用不同混凝土的拉伸行为。通过反分析，可以定义表征SFRC拉伸特性的应力裂纹打开关系，并将其与观察到的板坯行为和承载能力相关联。测试结果表明，SFRC的拉伸性能在板的性能和承载能力中起着重要作用，并且可以认为它与基于物理的模型有关。

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