Abstract A fast repair method is developed for earthquake induced-flexure/shear damage at the bottom of the reinforced concrete (RC) columns. The method is a kind of hybrid jacket that employs a thin stainless steel jacket wrapped around the column and the outside stainless prestressed steel hoops. The prestressed steel hoops provide active confinement for the column and prevent premature buckling of the steel jacket. The stainless steel jacket provides confinement to the core concrete, and, as well as, prevent the prestressed hoops from penetrating the concrete to cause stress loss. A large-scale RC column was damaged during pseudo-static cyclic loads, firstly, and then repaired with this method as experimental validation. The pseudo-static cyclic test results from the original and repaired RC columns were compared for failure mode, hysteresis behavior, strength and stiffness degradation, ductility, energy dissipation, and damage status. The repair method was proved to be effective in restoring the structural behavior of the damaged columns to prevent bridge collapse. The ductility of the repaired specimens was 111.4% that of the original specimen; the lateral force capacity was 113.3% that of the original specimen. This repair method can be used to repair columns with repairable damage as an emergency repair, or construction method for new structures.

中文翻译：

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用预应力不锈钢箍和不锈钢夹套快速修复钢筋混凝土桥柱

摘要 针对钢筋混凝土(RC)柱底部的地震致弯/剪损伤，提出了一种快速修复方法。该方法是一种混合夹套，采用薄的不锈钢夹套包裹在柱子上，外加不锈钢预应力钢箍。预应力钢箍为柱提供主动约束并防止钢护套过早屈曲。不锈钢护套对核心混凝土提供限制，并防止预应力箍穿透混凝土造成应力损失。某大型钢筋混凝土柱在拟静力循环荷载作用下，首先采用该方法进行修复，作为实验验证。比较了原始和修复的 RC 柱的伪静态循环试验结果的失效模式，滞后行为、强度和刚度退化、延展性、能量耗散和损坏状态。该修复方法被证明可以有效地恢复受损柱的结构行为，以防止桥梁倒塌。修复后试件的延展性为原试件的111.4%；横向受力能力为原始试件的 113.3%。这种修复方法可用于修复损坏可修复的柱子作为紧急修复，或新结构的施工方法。横向受力能力为原始试样的 113.3%。这种修复方法可用于修复损坏可修复的柱子作为紧急修复，或新结构的施工方法。横向受力能力为原始试件的 113.3%。这种修复方法可用于修复损坏可修复的柱子作为紧急修复，或新结构的施工方法。