Investigation of Mechanical Properties of Steel Fibre-Reinforced Concrete

机译：钢纤维钢筋混凝土力学性能研究

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Steel fibre-reinforced concrete (SFRC) is widely used in the structural elements of buildings: industrial floors, slabs, walls, foundation, etc. When a load is applied to a fibre-reinforced composite consisting of a low-modulus matrix reinforced with high-strength, high-modulus fibres, the plastic flow of the matrix under stress transfers the load to the fibre; this results in high-strength, high-modulus material which determines the stiffness and stress of the composite. In this study the equivalent flexural strength, equivalent flexural ratio R_(e,3) and the compressing strength of SFRC are investigated. Notched test specimens with five different dosages of steel fibres (20, 25, 30, 35, 40 kg/m3) were prepared using industrial concrete. Determination of flexural tension strength was carried out according to the EU norm EVS-EN 14651:2005+Al:2007. The equivalent flexural strength and subsequent equivalent flexural ratio R_(e,3) of SFRC with a dosage of 20, 25, 30, 35 kg/m~3 similar to their average values and with a dosage of 40 kg/m~3 were 31% higher than their average values. The compressive strength of the steel fibre-reinforced concrete was slightly higher compared to plain concrete, except specimens with the dosage of 40 kg/m3 where the increase was 30%.

机译：钢纤维混凝土（SFRC）广泛应用于建筑物的结构元素：工业地板，板坯，墙壁，基础等。当载荷应用于由高模量矩阵组成的纤维增强复合材料，其高压-Strength，高模量纤维，基质下的塑性流量将负载转移到纤维上;这导致高强度，高模量材料，其决定了复合材料的刚度和应力。在该研究中，研究了等效弯曲强度，等效弯曲比R_（e，3）和SFRC的压缩强度。使用工业混凝土制备具有五种不同剂量的钢纤维（20,25,30,35,40kg / m 3）的缺口试样。根据Eu Norm Norm EVS-EVS-2005 + AL：2007进行弯曲张力强度的测定。使用20,25,30,35kg / m〜3的剂量为20,25,30,35kg / m〜3的等效弯曲强度和随后的等效弯曲比R_（e，3），类似于它们的平均值和40kg / m〜3的剂量比平均值高出31％。与普通混凝土相比，钢纤维钢筋混凝土的抗压强度略高，除了剂量为40kg / m3的标本，其中增加为30％。

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《International Confernece on Innovative Materials, Structures and Technologies》|2016年||共6页
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A Ryabchikov; V Tamme; M Laurson;
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中图分类工程材料学;
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4. Investigation of Mechanical Properties of Steel Fibre-Reinforced Concrete [C] . A Ryabchikov, V Tamme, M Laurson International Confernece on Innovative Materials, Structures and Technologies . 2016

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5. Bond strength of deformed reinforcing bars in plain high-strength concrete and high-strength steel fibre-reinforced concrete. [D] . Berube, Frederic-Simon. 2003

机译：普通高强度混凝土和高强度钢纤维增强混凝土中变形钢筋的粘结强度。
6. Thin Slabs Made of High-Performance Steel Fibre-Reinforced Cementitious Composite: Mechanical Behaviour Statistical Analysis and Microstructural Investigation [O] . Paulo Roberto Ribeiro Soares Junior, Priscila Souza Maciel, Richard Rodrigues Barreto, 2019

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7. Mechanical properties of various concrete after high temperature exposure Mechanical property of various types of concrete after high temperature exposure is investigated. Considering compressive strength requirement for a vertical element in high rise building, concrete specimens with various design strengths of 35, 80, 100, and 150 MPa were tested. Particularly, the influence of incorporated steel fiber on fire resistance is of interest in this study. Experimental results show that the fire resistance depends on the design strength and steel fiber content. Normal strength concrete (NSC) of a design strength of 35 MPa or high performance concrete (HPC) of 80-100 MPa does not spall when exposed to 100-400 °C of temperature. However, an explosive spalling occurs at 300 °C when the HPCs contain 1 vol. of steel fiber. Ultra-high performance concrete (UHPC) of a design strength of 150 MPa and 1.5 vol. of steel fiber also shows dramatic spalling at 300 °C. The experimental results found in this study can contribute to a better understanding of the behaviors of HPC and UHPC under fire and the role of steel fiber on the fire resistance. [O] . 2017

机译：研究了高温暴露后各种混凝土高温曝光机械性能各种混凝土的机械性能。考虑到高层建筑中垂直元件的抗压强度要求，测试了35,80,100和150MPa各种设计强度的混凝土试样。特别是，在这项研究中，掺入钢纤维对耐火性的影响。实验结果表明，耐火性取决于设计强度和钢纤维含量。在暴露于100-400°C的温度时，80-100MPa的设计强度为35MPa或高性能混凝土（HPC）的正常强度混凝土（NSC）不会击落。然而，当HPC含有1体积的钢纤维的百分比时，爆炸性剥落发生在300℃。超高性能混凝土（UHPC）的设计强度为150 MPa和1.5 Vol。钢纤维的百分比也显示出300℃的剧烈剥落。本研究中发现的实验结果可以有助于更好地了解在火灾中的HPC和UHPC的行为以及钢纤维对耐火性的作用。

Investigation of Mechanical Properties of Steel Fibre-Reinforced Concrete

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