A series of flexural tests were performed in order to investigate the effect of steel fiber reinforcement (SFR) in textile-reinforced concrete (TRC) plates. Some of the specimens were reinforced only with textile, some of them only with fibers, and some of them were provided with both textile and fiber reinforcement. The concrete matrix was a self-developed ultrahigh performance concrete (UHPC) mixture with a compression strength over 160 MPa. The tensile strength of the used textiles was around 1500 MPa for glass fiber textile and over 3000 MPa for carbon fiber textile. In case of fiber reinforcement, the concrete was reinforced with 2 vol% of 15 mm long and 0.2 mm diameter plain high strength steel fibers. The dimensions of the rectangular plate test specimens were 700 × 150 × 30 mm. The plate specimens were tested in a symmetric four-point bending setup with a universal testing machine. The tests were monitored using a photogrammetric measurement system with digital image correlation (DIC). The paper presents and evaluates the test results, analyses the crack patterns and crack development, and compares the failure modes. The results showed a general advantageous mechanical behavior of specimens reinforced with the combination of fibers and textiles in comparison to the specimens reinforced with only fiber or textile reinforcement.

中文翻译：

---

纤维和纺织品增强结合对UHPC板抗弯性能的影响

为了研究钢纤维增强材料（SFR）在纺织品增强混凝土（TRC）板中的作用，进行了一系列弯曲测试。一些标本仅用织物增强，一些标本仅用纤维增强，而另一些标本同时用织物和纤维增强。混凝土基体是自行开发的超高性能混凝土（UHPC）混合物，抗压强度超过160 MPa。对于玻璃纤维织物，所用织物的抗张强度约为1500 MPa，对于碳纤维织物，其抗张强度超过3000 MPa。如果是纤维增强，则用2％（体积）的15毫米长和0.2毫米直径的普通高强度钢纤维来增强混凝土。矩形板试样的尺寸为700×150×30 mm。使用通用测试机以对称的四点弯曲设置测试板样品。使用具有数字图像相关性（DIC）的摄影测量系统对测试进行监控。本文介绍并评估了测试结果，分析了裂纹模式和裂纹发展，并比较了失效模式。结果表明，与仅用纤维或织物增强材料增强的样品相比，用纤维和织物组合增强的样品具有总体上有利的机械性能。