Numerical Simulation of a Ground Anchor Pullout Test Monitored with Fiber Optic Sensors

AbstractThis paper presents a comprehensive study of the load transfer mechanism of a soil anchor during pullout test. The anchor was monitored with fiber optic sensors installed along the tendon and embedded in the grout, which enabled continuous measurements of strains with a spatial resolution of...

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Bibliographic Details
Published in:Journal of geotechnical and geoenvironmental engineering 2021-02, Vol.147 (2)
Main Authors: Fabris, Carla, Schweiger, Helmut F, Pulko, Boštjan, Woschitz, Helmut, Račanský, Václav
Format: Article
Language:English
Subjects:
Computer simulation
Constitutive models
Fiber optics
Ground anchors
Grout
In situ measurement
Load transfer
Mathematical models
Optical fibers
Pull out tests
Sensors
Simulation
Soil
Soil testing
Spatial discrimination
Spatial resolution
Strain
Technical Papers
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Summary:AbstractThis paper presents a comprehensive study of the load transfer mechanism of a soil anchor during pullout test. The anchor was monitored with fiber optic sensors installed along the tendon and embedded in the grout, which enabled continuous measurements of strains with a spatial resolution of about 10 mm. The measured strain profile along the tendon indicates that the load is not transferred from the tendon to the grout at the same rate along the fixed length. Crack development was verified by measured peaks along the longitudinal strain profile. The in situ measurements were compared with results from finite-element simulations contributing to the interpretation of the in situ results. The load–displacement curves and strain distributions obtained with the numerical simulations compare well with measurements. The constitutive model selected for the grout is capable of reproducing the crack development and the numerical simulations suggest that debonding occurred during the anchor pullout test.
ISSN:1090-0241
1943-5606
DOI:10.1061/(ASCE)GT.1943-5606.0002442