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Outline
A double shear test device without friction between joint surfaces was used to conduct shear tests on anchor cables and the new type of anchor cable with C-shaped tube(ACC), and the effect of preload on the shear properties of the two structures was analyzed. The test results show that the negative effect of preload on the anchor cable is greater than that of the ACC. As the preload is increased from 100 kN to 300 kN, the shear load capacity of the anchor cable is reduced by a maximum of 14.82％, while the ACC is reduced by only 6.53％. Meanwhile, finite element simulation was utilized to further study the shear deformation properties of the ACC. The results show that the higher the preload, the lower the peak shear load and breaking displacement of the ACC, the higher the flexural stiffness of the structure, the earlier the strength of the specimen is mobilized and the faster the specimen fails locally. Under low preload conditions, the breaking displacement of the ACC is greater, which is due to the fact that for the same shear displacement, a lower preload will result in less tensile deformation at the shear plane location of the structure, and will also result in a larger bending angle of the structure at the shear plane location.
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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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