ABSTRACT An experimental study including reverse quasi-static cyclic tests on solid and hollow Unreinforced Masonry walls strengthened with thin steel fiber-reinforced mortar (SFRM) coating is herein presented. Three types of mortars containing nano-silica and three different typologies of short high-strength steel fibers are used. Compared to traditional coating techniques, the proposed strengthening method adopts a thin layer (25 mm tick) of SFRM anchored on the wall surface by means of steel connectors. Results show that this novel technique provides significant enhancement in terms of strength and stiffness. Critical considerations on the in-plane lateral resistance of masonry walls are reported.

中文翻译：

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钢纤维砂浆涂层改造实心和空心粘土砖砌体墙体的试验研究

摘要 本文介绍了一项实验研究，包括对用薄钢纤维增强砂浆 (SFRM) 涂层加固的实心和空心无筋砌体墙进行反向准静态循环试验。使用了三种含有纳米二氧化硅的砂浆和三种不同类型的短高强度钢纤维。与传统的涂层技术相比，所提出的加固方法采用薄层（25 毫米刻度）SFRM 通过钢连接件锚定在墙体表面。结果表明，这种新技术显着提高了强度和刚度。报告了对砌体墙的平面侧向阻力的关键考虑因素。