This paper proposes an innovative externally-hung self-centering rocking wall (ESRW) structural system for retrofitting existing reinforced concrete structures. Reinforced corbels are installed on the columns of an existing structure to which rocking walls having unbonded post-tensioned tendons are connected using H-shaped connectors. The seismic performance and self-centering ability of the ESRW were investigated through a series of shaking table tests. For comparison, an unretrofit control structure (UCS) was also tested. The UCS was severely damaged under peak ground acceleration (PGA) = 1.2 g test conditions: some reinforcing bars were fractured and the UCS was close to collapse. For the ESRW, the damage was significantly reduced: there were only minor cracks appearing at PGA = 1.5 g test conditions and no damage appeared at the corners of the rocking walls. The maximum story drift and residual deformation of the ESRW were reduced 88% and 92%, respectively, relative to the UCS test. The ESRW structure showed desirable seismic performance and self-centering characteristics during shaking table tests.

本文提出了一种创新的外部悬挂式自定心摇摆墙（ESRW）结构系统，用于翻新现有的钢筋混凝土结构。加固的牛腿安装在现有结构的立柱上，使用H形连接器将具有未粘结后张预应力筋的摇摆壁连接到该结构上。通过一系列的振动台试验研究了ESRW的抗震性能和自定心能力。为了进行比较，还测试了非改装控制结构（UCS）。在峰值地面加速度（PGA）= 1.2 g测试条件下，UCS受到严重损坏：一些钢筋断裂，UCS接近崩溃。对于ESRW，损坏显着减少：在PGA = 1处仅出现细小裂纹。5 g的测试条件，在摇摆壁的拐角处没有损坏。相对于UCS测试，ESRW的最大楼层漂移和残余变形分别减少了88％和92％。ESRW结构在振动台测试期间显示出理想的抗震性能和自定心特性。