This　paper　proposed　a　new　self-centering　brace　(SCB),　which　consists　of　four　post-tensioned　(PT)　high　strength　steel　strands　and　energy　absorbing　steel　plate　(EASP)　clusters.　First,　analytical　equations　were　derived　to　describe　the　working　principle　of　the　SCB.　Then,　to　investigate　the　hysteretic　performance　of　the　SCB,　four　full-size　specimens　were　manufactured　and　subjected　to　the　same　cyclic　loading　protocol.　One　additional　specimen　using　only　EASP　clusters　was　also　tested　to　highlight　the　contribution　of　PT　strands.　The　test　parameters　varied　in　the　testing　process　included　the　thickness　of　the　EASP　and　the　number　of　EASP　in　each　cluster.　Testing　results　shown　that　the　SCB　exhibited　nearly　flag-shape　hysteresis　up　to　expectation,　including　excellent　recentering　capability　and　satisfactory　energy　dissipating　capacity.　For　all　the　specimens,　the　ratio　of　the　recovered　deformation　is　in　the　range　of　89.6%　to　92.1%,　and　the　ratio　of　the　height　of　the　hysteresis　loop　to　the　yielding　force　is　in　the　range　of　0.47　to　0.77.　Finally,　in　order　to　further　understand　the　mechanism　of　the　SCB　and　provide　additional　information　to　the　testing　results,　the　high-fidelity　finite　element　(FE)　models　were　established　and　the　numerical　results　were　compared　against　the　experimental　data.　Good　agreement　between　the　experimental,　numerical,　and　analytical　results　was　observed,　and　the　maximum　difference　is　less　than　12%.　Parametric　analysis　was　also　carried　out　based　on　the　validated　FE　model　to　evaluate　the　effect　of　some　key　parameters　on　the　cyclic　behavior　of　the　SCB.