Knicken von schlanken Pfählen in weichen Böden

Translated title of the contribution: Buckling of slender piles in soft soils

Norbert Vogt, Stefan Vogt, Christian Kellner

Research output: Contribution to specialist publicationArticle

12 Scopus citations

Abstract

Buckling of piles is resisted by the surrounding soil. Therefore, in sufficiently stiff soils there is no risk of buckling of piles with conventional geometry (L/D ratio). National and international design codes require checks of the safety against buckling for slender piles in soils with an undrained shear strength of c u < 15kPa or c u < WkPa, respectively. In practice, the codes are taken to imply that buckling failure does not occur at higher undrained shear strengths. However, using simple calculations this assumption has been proven to be invalid for slender piles in very soft soils. Therefore, buckling tests on piles up to 4 m long were carried out at the Zentrum Geotechnik of the Technical University of Munich. Based on these results a concept for calculating buckling loads was derived, which covers all essential aspects observed in the tests. The proposed model accounts for material non-linearity as well as second order effects.

Translated title of the contributionBuckling of slender piles in soft soils
Original languageGerman
Pages889-901
Number of pages13
Volume82
No12
Specialist publicationBautechnik
DOIs
StatePublished - 2005

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