Damage Detection and Evaluation for an In-Service Shield Tunnel Based on the Monitored Increment of Neutral Axis Depth Using Long-Gauge Fiber Bragg Grating Sensors

@article{Shen2019DamageDA,
  title={Damage Detection and Evaluation for an In-Service Shield Tunnel Based on the Monitored Increment of Neutral Axis Depth Using Long-Gauge Fiber Bragg Grating Sensors},
  author={Sheng Shen and Hua Lv and Sheng-Lan Ma},
  journal={Sensors (Basel, Switzerland)},
  year={2019},
  volume={19}
}
It is difficult to detect and evaluate the structural damage in a shield tunnel during operation because many traditional techniques based on the observation of vibrations are limited in daily monitoring in tunnels. Thus, the curvature radius of a static longitudinal settlement curve is used to identify the residual health and safety of an in-service shield tunnel. However, there are still two problems. The curvature radius is suitable for a qualitative judgment rather than a quantitative… Expand
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References

SHOWING 1-10 OF 59 REFERENCES
Dynamic Method of Neutral Axis Position Determination and Damage Identification with Distributed Long-Gauge FBG Sensors
TLDR
A new method to determine NAP is developed by using modal macro-strain (MMS), and with the proposed method, accurate assessment of flexural structures can be facilitated. Expand
Damage detection of metro tunnel structure through transmissibility function and cross correlation analysis using local excitation and measurement
Abstract In a modern metropolis, metro rail systems have become a dominant mode for mass transportation. The structural health of a metro tunnel is closely related to public safety. Many… Expand
Detecting minute damage in beam-like structures using the neutral axis location
The neutral axis is the curve within a cross-section of a beam under loading at which the normal stress and strain vanish. The neutral axis is correlated with the centroid of stiffness which depends… Expand
Neutral-Axis Position Based Damage Detection of Bridge Deck Using Strain Measurement : Numerical and Experimental Verifications
This paper provides numerical and experimental studies on using the neutral-axis position as a damage index for bridge deck condition assessment. A beam-like deck model subjected to moving bogies is… Expand
A structural health assessment method for shield tunnels based on torsional wave speed
Following recent rapid developments in tunnel engineering in China, the heavy structural maintenance work of the future is likely to pose a great challenge. Newly developed vibration-based health… Expand
Safety Monitoring of Railway Tunnel Construction Using FBG Sensing Technology
In comparison with above-ground structures, the investigation of underground space structures still faces great challenges because of the extremely complicated constitutive relationships of the soils… Expand
STUDY ON THE ANALYTICAL MODEL OF SHIELD TUNNEL IN LONGITUDINAL DIRECTION
As well known, a shield tunnel is one of typical long structures. Its lining has many segment joints in the cross section and in longitudinal direction. For rational design of a shield tunnel subject… Expand
Study on Maintenance Technology of Shield Tunnel in Soft Ground
Shield tunnel disease, such as lining cracks, deformation and leakage, would appear in different degree under the long-term impact of nature and operation. These diseases not only endanger the… Expand
Deformational responses of operated shield tunnel to extreme surcharge: a case study
Abstract A field case of operated shield tunnel disrupted by unexpected extreme surcharge in Shanghai is reported in this paper. The deformational responses of segmental lining, in terms of… Expand
Flattening of jointed shield-driven tunnel induced by longitudinal differential settlements
Abstract Longitudinal differential settlement of shield-driven tunnel may cause longitudinal bending of the structure, which may further introduce flattening of the tunnel. The flattening of a tunnel… Expand
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