| Title: | Numerical simulation of the pile integrity test on defected piles |
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| Authors: | ID Ćosić, Mladen (Author)
ID Folić, Boris (Author)
ID Folić, Radomir (Author)
ID Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru (Copyright holder) |
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| Files: |  Acta_geotechnica_Slovenica_2014_Cosic,_Folic,_Folic_Numerical_simulation_of_the_pile_integrity_test_on_defected_piles.pdf (769,91 KB)
MD5: 466316196CFCB4DD3E0FEC232BE2D3A8
PID: 20.500.12556/dkum/a83327a1-fabc-4eb4-b640-564740d4191b
 http://fgserver3.fg.um.si/journal-ags/2014-2/article-1.asp
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| Language: | English |
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| Work type: | Scientific work |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FGPA - Faculty of Civil Engineering, Transportation Engineering and Architecture
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| Abstract: | This paper deals with the development of a discrete numerical 2D and 3D solid pile model with a discontinuity and defects to simulate non-destructive testing using the pile integrity test (PIT). The pile discontinuity and defects were modelled by reducing the specific finite elements and the elastic modulus of concrete. The wave-propagation response of the pile was analyzed based on a step-by-step numerical integration using the Hilber-Hughes-Taylor (HHT) method in the time domain. The concept of a system-response analysis was originally formulated based on the integration of individual reflectograms into a reflectogram surface, which is generated in a 3D cylindrical coordinate system. The use of reflectogram surfaces enables an understanding of wave propagation based on their velocity to a higher level than is usually the case with standard, one-dimensional reflectograms. Changes in the velocity responses on the reflectogram, shifting from a positive to a negative value, point to the locations of discontinuities and defects in the discrete 3D pile model, and there is a clear difference in the reflectograms, depending on the position of the measuring point. The study defines the typological models of the reflectogram: without discontinuities and defects, pile-head defect, defect in the middle of the pile length or a reduced modulus of elasticity in the middle of the pile length, pile-base defect or reduced modulus of elasticity in the pile-base zone and reduced modulus of elasticity in the pile-head zone. |
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| Keywords: | reflectogram surface, numerical pile model, solid finite elements |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Year of publishing: | 2014 |
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| Number of pages: | str. 5-19 |
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| Numbering: | Letn. 11, št. 2 |
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| PID: | 20.500.12556/DKUM-70819  |
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| ISSN: | 1854-0171 |
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| UDC: | 624.131.35 |
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| ISSN on article: | 1854-0171 |
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| COBISS.SI-ID: | 281008384 |
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| NUK URN: | URN:SI:UM:DK:1ETJPQFA |
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| Copyright: | Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru |
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| Publication date in DKUM: | 14.06.2018 |
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| Views: | 1249 |
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| Downloads: | 90 |
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| Metadata: |    |
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| Categories: | Misc.
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