Field test study on the evaluation of the microvibration controlling capacity of a mass concrete layer
Abstract Microvibration induced by natural disturbance and human activities has an adverse effect on the operation of the large-scale and ultraprecise facilities in the world. Under such circumstances, a passive vibration control method is generally deployed for such vibration-sensitive facilities,...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-11-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-23173-1 |
| _version_ | 1797986890258841600 |
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| author | Ming Zheng Liangdong Zhuang Jiansheng Fan Yufei Liu Jinlong Ren Muning Rong Wei Zhai |
| author_facet | Ming Zheng Liangdong Zhuang Jiansheng Fan Yufei Liu Jinlong Ren Muning Rong Wei Zhai |
| author_sort | Ming Zheng |
| collection | DOAJ |
| description | Abstract Microvibration induced by natural disturbance and human activities has an adverse effect on the operation of the large-scale and ultraprecise facilities in the world. Under such circumstances, a passive vibration control method is generally deployed for such vibration-sensitive facilities, taking the High Energy Photo Source (HEPS) in Beijing as an example, a 3 m-thick mass concrete layer forming a ring foundation was cast at the facility, where a 1 m-thick reinforced concrete slab (RC slab) lies. Since microvibration control plays a crucial role in the operation of such large-scale scientific and ultraprecise facilities and few studies have been reported for large-scale concrete layer as antimicrovibration devices, this paper presents four field tests in Beijing, China, to evaluate the vibration control capacity of a mass concrete layer. Based on a large number of field tests, the effect of applying the concrete layer is discussed, and a reference is provided for the construction of similar facilities. The vibration signals, generated by shock excitation and ambient excitation, are measured through a highly sensitive and high-accuracy vibration acquisition system. It is concluded that the existence of the 1 m-thick RC slab has little influence on the microvibration signal frequency distribution in the vertical direction and that the signals from the concrete layer and subsoil differ by approximately 10 Hz in the vertical direction while differing by approximately 5 Hz in the horizontal direction. The microvibration control ability of the concrete layer is favorable in a higher frequency band over 20 ~ 30 Hz and more than 50% attenuation can be gained through the concrete layer; however, the microvibration control ability is not significant below 20 ~ 30 Hz. The vibration levels across different heights of the concrete layer section are the same. To prevent adverse vibration disturbance below 20 ~ 30 Hz, it is suggested that the traffic and road surface conditions should be taken into consideration when choosing the construction location. In addition, a long-term monitoring shows that 75% vibration energy at the site is firmly related to the construction activities which are approximately 1.4 km from the site. |
| first_indexed | 2024-04-11T07:39:06Z |
| format | Article |
| id | doaj.art-f40cf0a57ed246adb482e6de6a45dbab |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-11T07:39:06Z |
| publishDate | 2022-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-f40cf0a57ed246adb482e6de6a45dbab2022-12-22T04:36:38ZengNature PortfolioScientific Reports2045-23222022-11-0112112110.1038/s41598-022-23173-1Field test study on the evaluation of the microvibration controlling capacity of a mass concrete layerMing Zheng0Liangdong Zhuang1Jiansheng Fan2Yufei Liu3Jinlong Ren4Muning Rong5Wei Zhai6Department of Civil Engineering, Tsinghua UniversityDepartment of Civil Engineering, Tsinghua UniversityDepartment of Civil Engineering, Tsinghua UniversityDepartment of Civil Engineering, Tsinghua UniversityBeijing Construction Engineering Group Co., LtdBeijing Construction Engineering Group Co., LtdBeijing Construction Engineering Group Co., LtdAbstract Microvibration induced by natural disturbance and human activities has an adverse effect on the operation of the large-scale and ultraprecise facilities in the world. Under such circumstances, a passive vibration control method is generally deployed for such vibration-sensitive facilities, taking the High Energy Photo Source (HEPS) in Beijing as an example, a 3 m-thick mass concrete layer forming a ring foundation was cast at the facility, where a 1 m-thick reinforced concrete slab (RC slab) lies. Since microvibration control plays a crucial role in the operation of such large-scale scientific and ultraprecise facilities and few studies have been reported for large-scale concrete layer as antimicrovibration devices, this paper presents four field tests in Beijing, China, to evaluate the vibration control capacity of a mass concrete layer. Based on a large number of field tests, the effect of applying the concrete layer is discussed, and a reference is provided for the construction of similar facilities. The vibration signals, generated by shock excitation and ambient excitation, are measured through a highly sensitive and high-accuracy vibration acquisition system. It is concluded that the existence of the 1 m-thick RC slab has little influence on the microvibration signal frequency distribution in the vertical direction and that the signals from the concrete layer and subsoil differ by approximately 10 Hz in the vertical direction while differing by approximately 5 Hz in the horizontal direction. The microvibration control ability of the concrete layer is favorable in a higher frequency band over 20 ~ 30 Hz and more than 50% attenuation can be gained through the concrete layer; however, the microvibration control ability is not significant below 20 ~ 30 Hz. The vibration levels across different heights of the concrete layer section are the same. To prevent adverse vibration disturbance below 20 ~ 30 Hz, it is suggested that the traffic and road surface conditions should be taken into consideration when choosing the construction location. In addition, a long-term monitoring shows that 75% vibration energy at the site is firmly related to the construction activities which are approximately 1.4 km from the site.https://doi.org/10.1038/s41598-022-23173-1 |
| spellingShingle | Ming Zheng Liangdong Zhuang Jiansheng Fan Yufei Liu Jinlong Ren Muning Rong Wei Zhai Field test study on the evaluation of the microvibration controlling capacity of a mass concrete layer Scientific Reports |
| title | Field test study on the evaluation of the microvibration controlling capacity of a mass concrete layer |
| title_full | Field test study on the evaluation of the microvibration controlling capacity of a mass concrete layer |
| title_fullStr | Field test study on the evaluation of the microvibration controlling capacity of a mass concrete layer |
| title_full_unstemmed | Field test study on the evaluation of the microvibration controlling capacity of a mass concrete layer |
| title_short | Field test study on the evaluation of the microvibration controlling capacity of a mass concrete layer |
| title_sort | field test study on the evaluation of the microvibration controlling capacity of a mass concrete layer |
| url | https://doi.org/10.1038/s41598-022-23173-1 |
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