Several studies on different techniques can be found on retrofitting existing unreinforced masonry (URM) walls using varieties of materials ranging from reinforced plaster, grout and epoxy injection to fibre-reinforced polymers. Still, there is a significant lack of experimental data that consider using a material such as oriented strand board (OSB) timber panels, which can be easily sourced around the globe, and are considered to be economical and sustainable. Hence, this paper presents the first stage of a multi-phase experimental investigation into the possibility of retrofitting URM walls using OSB panels. An experimental programme with full-scale testing is expensive, therefore small-scale testing such as the approach presented here is ideal to provide insight when proposing a new retrofit technique. In this paper, flexural strength in the form of four-point bending tests has been obtained on three plain masonry prisms and six OSB retrofitted specimens (615 × 215 × 102.5 mm). The effectiveness of the proposed OSB panel retrofit techniques has been assessed in terms of flexural strength, out-of-plane load capacity and displacement. It was observed that the application of the OSB panel at the back of a masonry prism greatly influenced the out-of-plane behaviour of the retrofitted specimen by increasing its flexural capacity and also by preventing its quasi-brittle collapse.

中文翻译：

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用定向刨花板木板改装的砌体墙的平面外测试

在使用各种材料（从增强灰泥、灌浆和环氧树脂注入到纤维增强聚合物）改造现有的未增强砌体 (URM) 墙时，可以找到关于不同技术的多项研究。尽管如此，考虑使用定向刨花板 (OSB) 木板等材料的实验数据仍然严重缺乏，这些材料可以在全球范围内轻松采购，并且被认为是经济和可持续的。因此，本文介绍了使用 OSB 面板改造 URM 墙的可能性的多阶段实验研究的第一阶段。进行全面测试的实验程序很昂贵，因此，在提出新的改造技术时，像这里介绍的方法这样的小规模测试是提供洞察力的理想选择。在本文中，已在三个普通砌体棱柱和六个 OSB 改装试样（615 × 215 × 102.5 毫米）上获得了四点弯曲试验形式的弯曲强度。已在抗弯强度、平面外负载能力和位移方面评估了所提议的 OSB 面板改造技术的有效性。据观察，在砌体棱柱背面应用 OSB 面板，通过增加其抗弯能力和防止其准脆性倒塌，极大地影响了改造后的试样的面外行为。平面外负载能力和位移。据观察，在砌体棱柱背面应用 OSB 面板，通过增加其抗弯能力和防止其准脆性倒塌，极大地影响了改造后的试样的面外行为。平面外负载能力和位移。据观察，在砌体棱柱背面应用 OSB 面板，通过增加其抗弯能力和防止其准脆性倒塌，极大地影响了改造后的试样的面外行为。