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Author:
Simon Naveau
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2002-02-22 |
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I have to analyze the behaviour of piles under tension loads (settlements...).
For the skin friction I have to consider, may I use the same parameters as for the compression loads, or does the fenomenon change so that I have to use coefficients or a completely different model?
Thank you in advance,
SImon
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Follow-up:
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Author:
Dr Melvin England
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2002-03-05 |
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In Cementation’s experience, with relatively low strains and typical pile geometries, skin friction under static loading conditions appears to behave in the same manner and magnitude whether a pile is moving upwards or downwards.
One does need to be cautious about the loading history of any pile tested in tension. For example, a previous compression loading test will have locked in stresses between the base and the shaft and the subsequent friction in tension is reduced accordingly.
A further caution with concrete piles is that the concrete may crack when the stresses exceed 2-4N/mm2, this causes a change to the elastic behaviour of the pile.
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Return
to subject 'Piling'
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Follow-ups:
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Subject:
tension pile 