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首页> 外文期刊>Arabian Journal for Science and Engineering >Flexural Strengthening of Defected RC Slabs Using Strain‑Hardening Cementitious Composites (SHCC): An Experimental Work
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Flexural Strengthening of Defected RC Slabs Using Strain‑Hardening Cementitious Composites (SHCC): An Experimental Work

机译：用应变硬化水泥基复合材料（SHCC）加固钢筋混凝土板的抗弯强度：一项实验工作

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摘要

Using the strain-hardening cementitious composites (SHCC) in strengthening the structural members appeared in the lastyears, but strengthening the slabs using SHCC is very rare. This research presented experimentally the strengthening of RCslabs by using SHCC layers in the tension side. The main aim of this research is studying the flexural behavior of RC slabsstrengthened using SHCC. The experimental program consisted of six identical RC slabs. All slabs had the same compressionbars and were without tension bars. The width and depth of the slabs were 400 mm and 80 mm, respectively. The total lengthof the slabs was 1800 mm which was divided into a simple span and cantilever using intermediate support. The researchfocused on the layer thickness and the reinforcement ratio of the layer. The layer depth-to-the original slab depth ratios were25%, 37.5% and 62.5%, while the reinforcement ratios of the layer were 1.25%, 1.88% and 2.51%. Overlaying the SHCClayer at the tensile face of the unreinforced slabs enhanced the first crack by 63.73–318.68% and the ultimate carrying loadby 18.18–40.91%. Using the SHCC layer is adequate for the recommended ductility index according to FIB code.
机译：近年来出现了使用应变硬化水泥基复合材料（SHCC）加固结构构件的方法，但是使用SHCC加固平板的情况很少。这项研究实验性地提出了通过在张紧侧使用SHCC层来加强RCslabs的方法。这项研究的主要目的是研究用SHCC加固的RC板的抗弯性能。实验程序由六个相同的RC平板组成。所有平板都具有相同的压缩杆，而没有张力杆。平板的宽度和深度分别为400mm和80mm。平板的总长度为1800 mm，使用中间支撑分为简单的跨度和悬臂。研究集中在层厚度和层的增强比上。层的深度与原始板的深度之比为25％，37.5％和62.5％，而层的增强率为1.25％，1.88％和2.51％。在未加固板张拉面上覆盖SHCC层可将第一个裂缝增加63.73–318.68％，将最终承载量增加18.18–40.91％。根据FIB规范，使用SHCC层足以满足推荐的延展性指标要求。

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