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To mitigate residual deformation of structures under seismic action， a novel self-centering energy-dissipation brace with embedded U-shaped dampers （U-SCEDB） is proposed. The self-centering mechanism employs combined disc springs to provide self-centering capability， while a U-shaped damper serves as the energy dissipation system. Numerical simulations were performed on the brace， and the effects of various design parameters on its hysteretic behavior were systematically evaluated through analysis of the hysteretic curves. The results indicated that the proposed U-SCEDB exhibited stable energy dissipation capacity and superior self-centering capability. Specifically， the energy dissipation capacity and ultimate bearing capacity of the brace increased with the thickness of the U-shaped damper， the length of its straight segment， and the thickness of the energy dissipation plate. Additionally， the self-centering capability was enhanced with a higher pre-tension force applied to the steel strands. Increasing the number of disc spring stacks in series significantly enhanced the ultimate deformability of the brace， but the stiffness of the disc springs decreased relatively.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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