CHUNG-CHE CHOUWu, Chi-JengChi-JengWuHuang, Li-YuLi-YuHuangCórdova, AlvaroAlvaroCórdovaLin, Huang-ZuoHuang-ZuoLinChao, Shu-HsienShu-HsienChaoTsampras, GeorgiosGeorgiosTsamprasUang, Chia-MingChia-MingUangChao, Shih-HoShih-HoChaoChung, Hsin-YangHsin-YangChung2025-09-222025-09-222025https://www.scopus.com/record/display.uri?eid=2-s2.0-105014622582&origin=resultslisthttps://scholars.lib.ntu.edu.tw/handle/123456789/732237Reducing residual deformation or earthquake loads on the frame structure can enhance its seismic performance during ground motions. This study explores a novel system that uses a self-centering brace (SCB) to provide the re-centering capability of the frame and a sliding slab to reduce the system's acceleration. The floors are allowed to slide with respect to the re-centering steel frame by adding low-friction Teflon sheets, while various horizontal energy dissipating devices are used to enhance the seismic response of the frame. A self-centering disc-spring device is added to re-center the slab after sliding in Phase 1. In addition to the spring device, a friction device in Phase 2 or a steel-only sandwiched buckling-restrained brace in Phase 3 is incorporated. The floor is “rigidly” connected to the frame in Phase 4, simulating a typical frame construction. Four phases, comprising 32 shaking table tests, were conducted on the specimen. A near-fault motion record from the 2022 Guanshan and Chihshang earthquake was used. Phase 1 tests demonstrated that the SCB and horizontal disc-spring device could fully re-center both the frame and sliding slab at the maximum-considered earthquake (MCE) level. In Phases 2 and 3, the addition of horizontal energy dissipating devices to the frame reduced slab movement but resulted in higher floor acceleration compared to Phase 1 tests. Compared to Phase 4, the effect of the sliding slab caused a roof drift reduction of 23% and 18%, and a base shear reduction of 15% and 5%, in Phases 2 and 3, respectively. Summary: A new steel system is evaluated by using self-centering brace to provide the re-centering capability of the frame and a sliding slab to reduce the system's acceleration. Evaluate the seismic performance by conducting 32 shaking table tests on the full-scale, three-story steel frame in four different phases. The sliding slab, equipped with SCSDs in parallel with horizontal energy dissipation devices (i.e., FD or H-SBRB), reduced the seismic force on the frame compared to typical steel frames. The residual displacement of the frame specimen with the self-centering brace is very small at an earthquake intensity close to two times the MCE level.friction devicesandwiched buckling-restrained braceself-centering braceshaking table testsliding slab[SDGs]SDG11journal article10.1002/eqe.70053