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Through shear tests on small lead-core rubber bearings，the effects of bearing shear strain，compressive stress and loading frequency on the bearing's equivalent horizontal stiffness，post-yield stiffness，yield force and equivalent damping ratio are studied. The results show that： With the increase of shear strain，the equivalent horizontal stiffness and the post-yield stiffness of the bearing decrease，the yield force increases，and the equivalent damping ratio decreases linearly； with the increase of the vertical compressive stress，the equal the effective horizontal stiffness decreases，the stiffness decreases linearly after yielding，and the yield force and the equivalent damping ratio increase linearly； the loading frequency has basically no effect on the shear performance of the bearing and can be ignored； within 100% of the shear strain，apply the shear strain and compressive stress did not cause damage to the isolation bearing； large deformation and large compressive stress above 100% shear strain will cause the bearing to enter into plastic，causing partial permanent damage to the bearing. Suggestions that the working conditions need to be designed according to the actual needs of the shaking table test are put forward. The correction coefficient of the Japanese code equivalent horizontal stiffness calculation formula is proposed，which is compared with the measured value of the shaking table test to improve the accuracy.
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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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