Journal
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
Volume 147, Issue 2, Pages -Publisher
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)GT.1943-5606.0002442
Keywords
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Funding
- FFG-Project (Bridge-24) [858505]
- OBB Infrastruktur
- Asfinag
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This comprehensive study investigates the load transfer mechanism of a soil anchor during pullout test using fiber optic sensors to monitor strains, revealing non-uniform load transfer from tendon to grout and crack development verified by peak longitudinal strain measurements. Finite-element simulations show good agreement with in situ measurements, suggesting debonding occurred during anchor pullout test.
This 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. (c) 2020 American Society of Civil Engineers.
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