Depth of Fixity of Piles in Clay Under Dynamic Lateral Load

Dynamic experiments were carried out on instrumented model aluminium single piles embedded in clay of different consistencies to study its bending behaviour under lateral loads. Piles with different length to diameter ratios were used. Dynamic lateral load of different magnitudes ranging from 7 to 3...

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Bibliographic Details
Published in:Geotechnical and geological engineering 2013-04, Vol.31 (2), p.447-461
Main Authors: Ayothiraman, R., Boominathan, A.
Format: Article
Language:English
Subjects:
Aluminium
Aluminum
Bending moments
Civil Engineering
Clay
Clay (material)
Data acquisition
Deformation
Dynamic loads
Dynamic response
Dynamics
Earth and Environmental Science
Earth Sciences
Geotechnical Engineering & Applied Earth Sciences
Geotechnics
Hydrogeology
Knots
Lateral loads
Length
Load
Load tests
Loads (forces)
Maximum bending
Mechanical properties
Original Paper
Piles
Ratios
Static loads
Terrestrial Pollution
Waste Management/Waste Technology
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Summary:Dynamic experiments were carried out on instrumented model aluminium single piles embedded in clay of different consistencies to study its bending behaviour under lateral loads. Piles with different length to diameter ratios were used. Dynamic lateral load of different magnitudes ranging from 7 to 30 N at wide range of frequencies from 2 to 50 Hz were applied. The load transferred to the pile, pile head displacement and the strain variation along the pile length were measured using a dedicated data acquisition system. Static lateral load tests were also performed to investigate the magnification of dynamic response of piles in clay. It is found that the maximum bending moment due to dynamic load is magnified by about 1.5–4 times in comparison to the static load for short piles but about 9 times for long piles. Depth of fixity and effective pile length is also largely amplified under dynamic loads, thus indicating that a pile which behaves as a flexible pile under static load, may not exhibit flexible behaviour under dynamic load.
ISSN:0960-3182
1573-1529
DOI:10.1007/s10706-012-9597-z