Contribution of strain-hardening cementitious composites (SHCC) to shear resistance in hybrid reinforced concrete beams

IF 0.5 Q4 ENGINEERING, CIVIL Gradevnski Materijiali I Konstrukcije-Building Materials and Structures Pub Date : 2023-01-01 DOI:10.5937/grmk2300006l

Mladena Luković, Bartosz Budnik, Jelena Dragaš, Vedran Carević, Ivan Ignjatović

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Abstract

Strain Hardening Cementitious Composite (SHCC) is an innovative type of fibre-reinforced cement-based composite that has superior tensile properties. Because of this, it holds the potential to enhance the shear capacity of reinforced concrete (RC) beams, if applied properly. This paper presents the general and distinctive properties of SHCC as well as a literature review of topics related to the contribution of SHCC layers to the shear resistance of RC beams with and without shear reinforcement. Based on the analysed results, it is concluded that the main characteristics of SHCC are its microcracking behaviour, high ductility, and increased tensile strength (between 2 and 8 MPa) at large deformations. When used in structural elements, SHCC develops multiple parallel cracks compared to concentrated cracks in conventionally reinforced concrete. The biggest disadvantage of SHCC is its significant drying shrinkage. Although showing high variability, using SHCC as laminates with a thickness of 10 mm improves the shear capacity of hybrid RC beams, but debonding of interfaces in a hybrid system occurs in some cases.

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应变硬化胶凝复合材料(SHCC)对混合钢筋混凝土梁抗剪性能的贡献

应变硬化水泥基复合材料(SHCC)是一种新型的纤维增强水泥基复合材料，具有优异的拉伸性能。正因为如此，如果应用得当，它具有增强钢筋混凝土(RC)梁抗剪能力的潜力。本文介绍了SHCC的一般和独特的性能，并对有关SHCC层对有剪力加固和无剪力加固的RC梁抗剪能力的贡献的主题进行了文献综述。基于分析结果，得出SHCC的主要特征是微裂行为、高延展性和大变形时抗拉强度的提高(2 ~ 8 MPa)。当用于结构构件时，与传统钢筋混凝土中的集中裂缝相比，SHCC会产生多个平行裂缝。SHCC最大的缺点是干燥收缩率大。虽然使用厚度为10 mm的SHCC层合板可以提高混合RC梁的抗剪能力，但在某些情况下会发生界面剥离。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Gradevnski Materijiali I Konstrukcije-Building Materials and Structures ENGINEERING, CIVIL-

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25.00%

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审稿时长

4 weeks