Observation on environmental variability of modal properties of a cable-stayed bridge from one-year monitoring data

J. M. Ko; J. Y. Wang; Yiqing Ni; K. K. Chak

Observation on environmental variability of modal properties of a cable-stayed bridge from one-year monitoring data

J. M. Ko, J. Y. Wang, Yiqing Ni, K. K. Chak

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

22 Citations (Scopus)

Abstract

All right reserved. This paper presents a correlation analysis of modal frequencies and temperatures in the cable-stayed Ting Kau Bridge by use of measurement data. 45 accelerometers (a total of 67 channels) and 83 temperature sensors have been installed on the bridge for long-term monitoring. Based on one-year measurement data from selected sensors, variations of average temperatures measured at the bridge steel girder, deck concrete, asphalt and air are observed at one-hour intervals and statistically analyzed. Natural frequencies of the first eleven modes are also identified at one-hour intervals, and their variation ranges, mean values and standard deviations are determined from 770-hour sample data covering one-year cycle of environmental and operational conditions. Then the identified modal frequencies and the temperatures measured at the steel girder and deck concrete are used for correlation analysis. An inversely proportional trend in modal frequencies with temperature is found in this bridge.

Original language	English
Title of host publication	Structural Health Monitoring 2003
Subtitle of host publication	From Diagnostics and Prognostics to Structural Health Management - Proceedings of the 4th International Workshop on Structural Health Monitoring, IWSHM 2003
Publisher	DEStech Publications
Pages	467-474
Number of pages	8
ISBN (Electronic)	1932078207, 9781932078206
Publication status	Published - 1 Jan 2003
Event	4th International Workshop on Structural Health Monitoring: From Diagnostics and Prognostics to Structural Health Management, IWSHM 2003 - Stanford University, Stanford, United States Duration: 15 Sept 2003 → 17 Sept 2003

Conference

Conference	4th International Workshop on Structural Health Monitoring: From Diagnostics and Prognostics to Structural Health Management, IWSHM 2003
Country/Territory	United States
City	Stanford
Period	15/09/03 → 17/09/03

ASJC Scopus subject areas

Computer Science Applications
Health Information Management

Cite this

Ko, J. M., Wang, J. Y., Ni, Y., & Chak, K. K. (2003). Observation on environmental variability of modal properties of a cable-stayed bridge from one-year monitoring data. In Structural Health Monitoring 2003: From Diagnostics and Prognostics to Structural Health Management - Proceedings of the 4th International Workshop on Structural Health Monitoring, IWSHM 2003 (pp. 467-474). DEStech Publications.

Ko, J. M. ; Wang, J. Y. ; Ni, Yiqing et al. / Observation on environmental variability of modal properties of a cable-stayed bridge from one-year monitoring data. Structural Health Monitoring 2003: From Diagnostics and Prognostics to Structural Health Management - Proceedings of the 4th International Workshop on Structural Health Monitoring, IWSHM 2003. DEStech Publications, 2003. pp. 467-474

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title = "Observation on environmental variability of modal properties of a cable-stayed bridge from one-year monitoring data",

abstract = "All right reserved. This paper presents a correlation analysis of modal frequencies and temperatures in the cable-stayed Ting Kau Bridge by use of measurement data. 45 accelerometers (a total of 67 channels) and 83 temperature sensors have been installed on the bridge for long-term monitoring. Based on one-year measurement data from selected sensors, variations of average temperatures measured at the bridge steel girder, deck concrete, asphalt and air are observed at one-hour intervals and statistically analyzed. Natural frequencies of the first eleven modes are also identified at one-hour intervals, and their variation ranges, mean values and standard deviations are determined from 770-hour sample data covering one-year cycle of environmental and operational conditions. Then the identified modal frequencies and the temperatures measured at the steel girder and deck concrete are used for correlation analysis. An inversely proportional trend in modal frequencies with temperature is found in this bridge.",

author = "Ko, {J. M.} and Wang, {J. Y.} and Yiqing Ni and Chak, {K. K.}",

year = "2003",

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day = "1",

language = "English",

pages = "467--474",

booktitle = "Structural Health Monitoring 2003",

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Ko, JM, Wang, JY, Ni, Y & Chak, KK 2003, Observation on environmental variability of modal properties of a cable-stayed bridge from one-year monitoring data. in Structural Health Monitoring 2003: From Diagnostics and Prognostics to Structural Health Management - Proceedings of the 4th International Workshop on Structural Health Monitoring, IWSHM 2003. DEStech Publications, pp. 467-474, 4th International Workshop on Structural Health Monitoring: From Diagnostics and Prognostics to Structural Health Management, IWSHM 2003, Stanford, United States, 15/09/03.

Observation on environmental variability of modal properties of a cable-stayed bridge from one-year monitoring data. / Ko, J. M.; Wang, J. Y.; Ni, Yiqing et al.
Structural Health Monitoring 2003: From Diagnostics and Prognostics to Structural Health Management - Proceedings of the 4th International Workshop on Structural Health Monitoring, IWSHM 2003. DEStech Publications, 2003. p. 467-474.

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

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T1 - Observation on environmental variability of modal properties of a cable-stayed bridge from one-year monitoring data

AU - Ko, J. M.

AU - Wang, J. Y.

AU - Ni, Yiqing

AU - Chak, K. K.

PY - 2003/1/1

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N2 - All right reserved. This paper presents a correlation analysis of modal frequencies and temperatures in the cable-stayed Ting Kau Bridge by use of measurement data. 45 accelerometers (a total of 67 channels) and 83 temperature sensors have been installed on the bridge for long-term monitoring. Based on one-year measurement data from selected sensors, variations of average temperatures measured at the bridge steel girder, deck concrete, asphalt and air are observed at one-hour intervals and statistically analyzed. Natural frequencies of the first eleven modes are also identified at one-hour intervals, and their variation ranges, mean values and standard deviations are determined from 770-hour sample data covering one-year cycle of environmental and operational conditions. Then the identified modal frequencies and the temperatures measured at the steel girder and deck concrete are used for correlation analysis. An inversely proportional trend in modal frequencies with temperature is found in this bridge.

AB - All right reserved. This paper presents a correlation analysis of modal frequencies and temperatures in the cable-stayed Ting Kau Bridge by use of measurement data. 45 accelerometers (a total of 67 channels) and 83 temperature sensors have been installed on the bridge for long-term monitoring. Based on one-year measurement data from selected sensors, variations of average temperatures measured at the bridge steel girder, deck concrete, asphalt and air are observed at one-hour intervals and statistically analyzed. Natural frequencies of the first eleven modes are also identified at one-hour intervals, and their variation ranges, mean values and standard deviations are determined from 770-hour sample data covering one-year cycle of environmental and operational conditions. Then the identified modal frequencies and the temperatures measured at the steel girder and deck concrete are used for correlation analysis. An inversely proportional trend in modal frequencies with temperature is found in this bridge.

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BT - Structural Health Monitoring 2003

PB - DEStech Publications

T2 - 4th International Workshop on Structural Health Monitoring: From Diagnostics and Prognostics to Structural Health Management, IWSHM 2003

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Ko JM, Wang JY, Ni Y, Chak KK. Observation on environmental variability of modal properties of a cable-stayed bridge from one-year monitoring data. In Structural Health Monitoring 2003: From Diagnostics and Prognostics to Structural Health Management - Proceedings of the 4th International Workshop on Structural Health Monitoring, IWSHM 2003. DEStech Publications. 2003. p. 467-474

Observation on environmental variability of modal properties of a cable-stayed bridge from one-year monitoring data

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ASJC Scopus subject areas

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