The nature frequency identification of tunnel lining based on the microtremor method
Many tunnels all over the world have been in service for several decades, which require effective inspection methods to assess their health conditions. Microtremor, as a type of ambient vibration originating from natural or artificial oscillations without specific sources, has attracted more and mor...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2016-12-01
|
| Series: | Underground Space |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2467967416300289 |
| _version_ | 1797707216588898304 |
|---|---|
| author | Yujing Jiang Yang Gao Xuezhen Wu |
| author_facet | Yujing Jiang Yang Gao Xuezhen Wu |
| author_sort | Yujing Jiang |
| collection | DOAJ |
| description | Many tunnels all over the world have been in service for several decades, which require effective inspection methods to assess their health conditions. Microtremor, as a type of ambient vibration originating from natural or artificial oscillations without specific sources, has attracted more and more attentions in the recent study of the microtremor dynamic properties of concrete structures. In this study, the microtremors of the tunnel lining were simulated numerically based on the Distinct Element Method (DEM). The Power Spectra Density (PSD) of signals obtained from numerical simulations were calculated and the nature frequencies were identified using the peak-picking method. The influences of the rock-concrete joint, the rock type and the concrete type on the nature frequencies were also evaluated. The results of a comprehensive numerical analysis show that the nature frequencies lower than 100 Hz can be identified. As the bonding condition becomes worse, the nature frequencies decrease. The nature frequencies change proportionally with the normal stiffness of the rock-concrete joint. As the concrete grade decreases, the third mode of frequency also decreases gradually while the variation of the first two modes of frequencies can hardly be identified. Additionally, the field microtremor measurements of tunnel lining were also carried out to verify the numerical results. |
| first_indexed | 2024-03-12T06:03:08Z |
| format | Article |
| id | doaj.art-b953bdbcd24a41c9b58e5866fd397074 |
| institution | Directory Open Access Journal |
| issn | 2467-9674 |
| language | English |
| last_indexed | 2024-03-12T06:03:08Z |
| publishDate | 2016-12-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Underground Space |
| spelling | doaj.art-b953bdbcd24a41c9b58e5866fd3970742023-09-03T03:54:42ZengKeAi Communications Co., Ltd.Underground Space2467-96742016-12-011210811310.1016/j.undsp.2016.12.001The nature frequency identification of tunnel lining based on the microtremor methodYujing Jiang0Yang Gao1Xuezhen Wu2Graduate School of Engineering, Nagasaki University, Nagasaki 852-8521, JapanKey Laboratory of Structural Health Monitoring and Control, Shijiazhuang Tiedao University, Shijiazhuang 050043, ChinaGraduate School of Engineering, Nagasaki University, Nagasaki 852-8521, JapanMany tunnels all over the world have been in service for several decades, which require effective inspection methods to assess their health conditions. Microtremor, as a type of ambient vibration originating from natural or artificial oscillations without specific sources, has attracted more and more attentions in the recent study of the microtremor dynamic properties of concrete structures. In this study, the microtremors of the tunnel lining were simulated numerically based on the Distinct Element Method (DEM). The Power Spectra Density (PSD) of signals obtained from numerical simulations were calculated and the nature frequencies were identified using the peak-picking method. The influences of the rock-concrete joint, the rock type and the concrete type on the nature frequencies were also evaluated. The results of a comprehensive numerical analysis show that the nature frequencies lower than 100 Hz can be identified. As the bonding condition becomes worse, the nature frequencies decrease. The nature frequencies change proportionally with the normal stiffness of the rock-concrete joint. As the concrete grade decreases, the third mode of frequency also decreases gradually while the variation of the first two modes of frequencies can hardly be identified. Additionally, the field microtremor measurements of tunnel lining were also carried out to verify the numerical results.http://www.sciencedirect.com/science/article/pii/S2467967416300289Tunnel liningFrequencyVibration intensityMicrotremor measurementNumerical simulation |
| spellingShingle | Yujing Jiang Yang Gao Xuezhen Wu The nature frequency identification of tunnel lining based on the microtremor method Underground Space Tunnel lining Frequency Vibration intensity Microtremor measurement Numerical simulation |
| title | The nature frequency identification of tunnel lining based on the microtremor method |
| title_full | The nature frequency identification of tunnel lining based on the microtremor method |
| title_fullStr | The nature frequency identification of tunnel lining based on the microtremor method |
| title_full_unstemmed | The nature frequency identification of tunnel lining based on the microtremor method |
| title_short | The nature frequency identification of tunnel lining based on the microtremor method |
| title_sort | nature frequency identification of tunnel lining based on the microtremor method |
| topic | Tunnel lining Frequency Vibration intensity Microtremor measurement Numerical simulation |
| url | http://www.sciencedirect.com/science/article/pii/S2467967416300289 |
| work_keys_str_mv | AT yujingjiang thenaturefrequencyidentificationoftunnelliningbasedonthemicrotremormethod AT yanggao thenaturefrequencyidentificationoftunnelliningbasedonthemicrotremormethod AT xuezhenwu thenaturefrequencyidentificationoftunnelliningbasedonthemicrotremormethod AT yujingjiang naturefrequencyidentificationoftunnelliningbasedonthemicrotremormethod AT yanggao naturefrequencyidentificationoftunnelliningbasedonthemicrotremormethod AT xuezhenwu naturefrequencyidentificationoftunnelliningbasedonthemicrotremormethod |