PDF
Full
Outline
To study the impact of floor slab construction on metro-induced vibration responses and to explore the feasibility of reducing structural responses by optimizing floor construction, the conventional floor slab, the thickened floor slab and the additional sub-beam floor slab were designed and manufactured. Field model tests were carried out on the three test floor slabs respectively to study their dynamic response under on-site metro vibrations. Taking conventional floor slab as the test control group, the effects of increasing floor slab thickness or adding sub-beam on the floor slabs' characteristics and metro-induced vibration responses were compared and analyzed. The results indicate that the resonance effect is the main reason of metro-induced vibration responses of the floor slab. Increasing the floor slab thickness or adding sub-beam increases the vertical modal frequency of the floor slab, alleviate the resonance effect, and reduced the time-domain acceleration responses of the floor slab. Both increasing floor slab thickness and adding sub-beam can reduce the vibration acceleration level of the floor slab in a wide frequency band, and can reduce the weighted vibration level by 6 dB and 4 dB respectively, thus improving the vibration comfort performance of the floor slab. Adding secondary beams achieves a vibration reduction effect similar to doubling the floor slab thickness without significantly increasing the floor slab's weight and engineering cost. It is recommended that the addition of sub-beams as a floor construction measure be priority in the design of new metro adjacent structures to mitigate metro-induced vibration responses and improve vibration comfort.
PDF
66
31
| 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 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
