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This paper proposes a novel prestressed reinforced concrete (RC) column reinforcement method by replacing traditional angle steel with spatial special-shaped steel structures, which enhances constraint effectiveness and construction efficiency through prestressing technology and bolt connections. Four specimens were designed and subjected to axial compression tests to obtain failure modes, load-displacement curves, and strain distribution patterns of different configurations. The study found that post-earthquake damaged RC columns exhibited a 24% reduction in ultimate axial compressive bearing capacity and 46% stiffness degradation. After prestressed lattice steel reinforcement, concrete crack propagation was effectively controlled with significantly reduced damage severity. The bearing capacity and stiffness reached 141% and 115% of the original column’s values respectively, accompanied by a 20% improvement in deformation capacity, demonstrating excellent reinforcement performance. The prestressed lattice steel provides substantial lateral confinement, inducing compressive stresses in reinforced components that enhance material properties and retard crack development. Finally, based on the section equilibrium method, a calculation formula for axial compressive bearing capacity of fully bolted prestressed lattice steel-reinforced seismic-damaged RC columns was established, laying a theoretical foundation for engineering applications of this innovative reinforcement technique.
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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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