The effectiveness of a method to strengthen/repair unreinforced masonry (URM) by using timber-based products was investigated through experimental in situ testing. The strategy consists of timber-based panels connected to the masonry by means of screw fasteners. URM piers obtained from a century-old building were subjected to in-plane semi-cyclic quasi-static loading in as-built, repaired and retrofitted configurations. The application of the reinforcement on previously damaged piers led to a notable increase in the in-plane capacity while the initial stiffness of the repaired specimens was found to be consistent with that of the specimens tested as-built. When applied to undamaged masonry, the retrofit system allowed an in-plane force 40% higher than the capacity of the unreinforced walls, with the initial stiffness comparable with that of the repaired specimens. Both repaired and retrofitted specimens exhibited remarkable displacement capacity (drift levels > 2.0%) and energy dissipation.

中文翻译：

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用木板加固的砌体剪力墙的现场测试

通过现场试验研究了一种使用木基产品加固/修复未加固砌体 (URM) 的方法的有效性。该策略包括通过螺钉紧固件连接到砖石的木基面板。从一座具有百年历史的建筑中获得的 URM 桥墩在竣工、维修和改造配置中受到平面内半循环准静态载荷。在先前损坏的桥墩上应用加固导致平面内承载力显着增加，同时发现修复后的试件的初始刚度与测试时试件的刚度一致。当应用于未损坏的砌体时，改造系统允许的平面内力比未加固墙的承载力高 40%，初始刚度与修复后的试样相当。修复和改造的试样都表现出显着的位移能力（漂移水平 > 2.0%）和能量耗散。