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Response of piles with wings to monotonic and cyclic lateral loading in sand

Response of piles with wings to monotonic and cyclic lateral loading in sand
Response of piles with wings to monotonic and cyclic lateral loading in sand

Piles are required to withstand large lateral loads compared with the imposed vertical loads in certain applications in the offshore environment, such as for foundations for offshore wind turbines or as anchors for floating facilities. Although typically the soil strength increases with depth, close to the sea bed, the lateral capacity is often low. The requirement to limit pile head deflections necessitates the design of relatively long piles. Increasing the effective pile cross-section through "wings" close to the pile head is shown here with centrifuge model tests to reduce pile head deflections by approximately 50% compared with regular monopiles without "wings" for the same load level. The stiffer initial response of the winged pile also leads to smaller pile head deflections under cyclic loading, although the relative rate of accumulation is similar to that of a monopile. Simple methods for extrapolating from the monotonic pile head deflection to the deflection after thousands of cycles are compared with the results, and are shown to work equally well for piles with and without "wings".

Cyclic loading, Lateral loading, Piles, Sand
1090-0241
364-375
Bienen, Britta
1bc987aa-3d7f-4b0f-a6b4-9e4970f21d15
Dührkop, Jan
0d4ff78d-4932-4a12-9a87-965c8a8250ef
Grabe, Jürgen
13b0d452-07da-4a2d-be01-418dad42aec9
Randolph, Mark F.
75caa33a-e630-4ae8-84cd-758797bf9633
White, David J.
a986033d-d26d-4419-a3f3-20dc54efce93
Bienen, Britta
1bc987aa-3d7f-4b0f-a6b4-9e4970f21d15
Dührkop, Jan
0d4ff78d-4932-4a12-9a87-965c8a8250ef
Grabe, Jürgen
13b0d452-07da-4a2d-be01-418dad42aec9
Randolph, Mark F.
75caa33a-e630-4ae8-84cd-758797bf9633
White, David J.
a986033d-d26d-4419-a3f3-20dc54efce93

Bienen, Britta, Dührkop, Jan, Grabe, Jürgen, Randolph, Mark F. and White, David J. (2012) Response of piles with wings to monotonic and cyclic lateral loading in sand. Journal of Geotechnical and Geoenvironmental Engineering, 138 (3), 364-375. (doi:10.1061/(ASCE)GT.1943-5606.0000592).

Record type: Article

Abstract

Piles are required to withstand large lateral loads compared with the imposed vertical loads in certain applications in the offshore environment, such as for foundations for offshore wind turbines or as anchors for floating facilities. Although typically the soil strength increases with depth, close to the sea bed, the lateral capacity is often low. The requirement to limit pile head deflections necessitates the design of relatively long piles. Increasing the effective pile cross-section through "wings" close to the pile head is shown here with centrifuge model tests to reduce pile head deflections by approximately 50% compared with regular monopiles without "wings" for the same load level. The stiffer initial response of the winged pile also leads to smaller pile head deflections under cyclic loading, although the relative rate of accumulation is similar to that of a monopile. Simple methods for extrapolating from the monotonic pile head deflection to the deflection after thousands of cycles are compared with the results, and are shown to work equally well for piles with and without "wings".

Full text not available from this repository.

More information

Accepted/In Press date: 23 June 2011
e-pub ahead of print date: 25 June 2011
Published date: 30 March 2012
Keywords: Cyclic loading, Lateral loading, Piles, Sand

Identifiers

Local EPrints ID: 419915
URI: https://eprints.soton.ac.uk/id/eprint/419915
ISSN: 1090-0241
PURE UUID: 30cd7a6d-443b-4922-b7c2-0d5a3d412f2d
ORCID for David J. White: ORCID iD orcid.org/0000-0002-2968-582X

Catalogue record

Date deposited: 23 Apr 2018 16:30
Last modified: 14 Mar 2019 01:24

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