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Assessing the Difference in Measuring Bolt Stress: A Comparison of Two Optical Fiber Sensing Techniques
Joint Authors
Chai, Jing
Liu, Qi
Liu, Jinxuan
Zhang, Guihua
Zhang, Dingding
Qiu, Fengqi
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-06-12
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Monitoring the load level of the rock bolts is of great importance for assessing risk.
Based on the mechanical transmission mechanism of grouting bolts, the bolt pull-out test was carried out in lab.
The performance of the bolt under pull-out loading was measured using the pulse-pre-pump Brillouin optical time domain analysis (PPP-BOTDA) and fiber Bragg grating (FBG) sensing technologies.
The distribution characteristic of axial stress along the bolt was analysed in combination with the measurements obtained by the two sensing technologies.
The relative standard deviation for repeatability errors in the determination and the setting time of resin grout was investigated.
The results show that the distribution of axial stress is nonuniform along the anchorage section.
The maximum value of axial stress on the bolt is closed to the pull-out side.
The relative standard deviation for repeatability errors obtained by PPP-BOTDA is less than that obtained by FBG.
The comparison of the measurements obtained by the two methods indicates that when the drawing force is greater than 20 kN and the axial stress is more than 10 kN, the two methods have better consistency.
In the field application, it is necessary to estimate the deformation of matrix, leaving at least 500 minutes for resin bond to work.
American Psychological Association (APA)
Chai, Jing& Liu, Qi& Liu, Jinxuan& Zhang, Guihua& Zhang, Dingding& Qiu, Fengqi. 2018. Assessing the Difference in Measuring Bolt Stress: A Comparison of Two Optical Fiber Sensing Techniques. Journal of Sensors،Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1202057
Modern Language Association (MLA)
Chai, Jing…[et al.]. Assessing the Difference in Measuring Bolt Stress: A Comparison of Two Optical Fiber Sensing Techniques. Journal of Sensors No. 2018 (2018), pp.1-11.
https://search.emarefa.net/detail/BIM-1202057
American Medical Association (AMA)
Chai, Jing& Liu, Qi& Liu, Jinxuan& Zhang, Guihua& Zhang, Dingding& Qiu, Fengqi. Assessing the Difference in Measuring Bolt Stress: A Comparison of Two Optical Fiber Sensing Techniques. Journal of Sensors. 2018. Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1202057
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1202057