Nowadays, the existence of short columns is a major factor in the failure and collapse of structures during the earthquake. In this article, 10 reinforced concrete short columns are prepared and experimentally investigated under cyclic lateral displacements. Since failure in short columns under earthquake was in the form of diagonal cracks and shear rupture, two new techniques are proposed to strengthen short columns against seismic loads. These techniques include externally bonded reinforcement with carbon fiber-reinforced polymer sheets and near surface mounted with glass fiber-reinforced polymer bars in the form of transverse, diagonal, and hybrid strengthening techniques. The experimental results demonstrated that the above-mentioned strengthening techniques in short columns lead to a change in the type of failure from shear to flexural, and the change of crack patterns and columns failure. The mentioned strengthening methods lead to an increase of ductility, increase of load carrying capacity and increase of dissipated energy.

中文翻译：

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使用外部粘结钢筋、近表面安装和混合技术对钢筋混凝土短柱进行抗震加固的试验研究

如今，短柱的存在是造成地震中结构破坏和倒塌的主要因素。在本文中，准备了 10 根钢筋混凝土短柱，并在循环横向位移下进行了实验研究。由于地震作用下短柱的破坏形式为斜裂缝和剪切断裂，因此提出了两种新的技术来加强短柱抵抗地震荷载。这些技术包括使用碳纤维增强聚合物板进行外部粘合加固，以及以横向、对角线和混合加固技术的形式使用玻璃纤维增​​强聚合物杆进行近表面安装。试验结果表明，上述短柱加固技术导致破坏类型由剪切变为弯曲，以及裂缝模式和柱失效的变化。上述强化方法导致延性增加、承载能力增加和耗散能量增加。