The effectiveness of steel-reinforced grout (SRG) jacketing in improving the structural performance of deficient reinforced concrete (RC) columns is experimentally investigated in this study. Four full-scale cantilever columns were designed following the old construction practice (pre-1970s) in southern Europe. Due to lack of adequate seismic detailing, the columns were susceptible to buckling failure when subjected to combined axial loading and cyclic lateral displacement reversals, simulating seismic loading. Three alternative SRG jacketing configurations were applied differing in the number of layers and density of the Ultra High Tensile Strength Steel (UHTSS) textile. The test results demonstrated the efficiency of SRG jacketing to modify the response of the columns with poor detailing from brittle to ductile by substantially improving their overall structural performance. Finally, code formulations were used to assess the performance of the SRG jacketed columns.

本研究通过实验研究了钢筋灌浆 (SRG) 护套在改善缺陷钢筋混凝土 (RC) 柱结构性能方面的有效性。四个全尺寸悬臂柱是按照南欧的旧建筑实践（1970 年代之前）设计的。由于缺乏足够的抗震细节，当受到组合轴向载荷和循环横向位移反转时，柱子很容易发生屈曲破坏，模拟地震载荷。三种不同的 SRG 护套配置应用在超高拉伸强度钢 (UHTSS) 纺织品的层数和密度方面不同。测试结果证明了 SRG 护套的有效性，通过显着改善其整体结构性能，改善细节较差的柱的响应，从脆性到延性。最后，代码公式用于评估 SRG 夹套色谱柱的性能。