Analytical solution for distributed torsional low strain integrity test for pipe pile

Low strain integrity tests (LSITs) are the most popular non‐destructive methods for pile testing. However, traditional LSITs have encountered unprecedented challenges as the need for long pile and existing pile testing keeps multiplying. Compared to traditional longitudinal excitations, the torsiona...

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Bibliographic Details
Published in:International journal for numerical and analytical methods in geomechanics 2022-01, Vol.46 (1), p.47-67
Main Authors: Zhang, Yunpeng, Jiang, Guosheng, Wu, Wenbing, El Naggar, M. Hesham, Liu, Hao, Wen, Minjie, Wang, Kuihua
Format: Article
Language:English
Subjects:
Defects
distributed sensor technique
Exact solutions
Finite element method
Integrity
low strain integrity test
Mathematical analysis
Necking
Pile tests
Piles
pipe pile
Pipe piles
Segregation
Testing
torsional vibration
Velocity
velocity response
Wave attenuation
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Summary:Low strain integrity tests (LSITs) are the most popular non‐destructive methods for pile testing. However, traditional LSITs have encountered unprecedented challenges as the need for long pile and existing pile testing keeps multiplying. Compared to traditional longitudinal excitations, the torsional wave is less influenced by the velocity attenuation effect and can be subjected at the pile shaft for existing piles. Distributed torsional LSIT is proposed in this article with the presentation of the corresponding analytical solutions that exhibiting the velocity responses along the pile shaft. The solution is verified with previous simplified theoretical and rigorous finite element method (FEM) answers. At the end, the application of this method is exhibited through the identification of necking and concrete segregation defects on pipe piles, which shows the advantage of this method on long pile testing.
ISSN:0363-9061
1096-9853
DOI:10.1002/nag.3290