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An innovative amalgamation of the very short shear link (VSSL) and shear slotted bolted connection (SSBC), referred to as the VSSL-SSBC, ingeniously enhances the ductility and energy dissipation capacity of the VSSL, resulting in minimal damage. Consequently, the seismic resilience of eccentrically braced frames is markedly augmented. Cyclic loading tests were carried on a VSSL specimen, three VSSL-SSBC specimens with friction slip and a VSSL-SSBC specimen with ultimate deformation respectively, so the failure modes, hysteretic curves, bond curves and mechanical curves can be investigated. The experimental findings indicate that the mechanical property of the VSSL-SSBC exhibits a bifurcated developmental trajectory, characterized by initial stages involving friction slip within the SSBC and subsequent severe damage within the VSSL. Moreover, the ultimate bearing capacity and failure mechanisms of the VSSL-SSBC are observed to be congruent with those of the standalone VSSL. As for the mechanical curves, the VSSL exhibits distinct stages, encompassing elastic, elastic-plastic, and failure phases. In contrast, the SSBC is characterized by an initial elastic and subsequent slip phase. The VSSL-SSBC, a hybrid configuration, undergoes an extended sequence of elastic, slip, elastic-plastic, and failure stages. Notably, the deformation and damage of the VSSL within the VSSL-SSBC are significantly mitigated at equivalent displacements when compared to the standalone VSSL.Ultimately, the utilization of the finite element method (FEM) has been employed to corroborate the hysteretic curve and failure mechanisms with specimen VSSL-SSBC. The findings from the FEM simulations demonstrate a high degree of concordance with the experimental data.
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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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