Details
| Original language | English |
|---|---|
| Pages (from-to) | 267-288 |
| Number of pages | 22 |
| Journal | Geotechnik |
| Volume | 38 |
| Issue number | 4 |
| Publication status | Published - 2 Dec 2015 |
Abstract
When it comes to the general design of laterally loaded piles in offshore environments, bedding resistance is usually modelled by the p-y method recommended in the offshore guidelines (OGL). Several investigations presented in the literature indicate that the head displacements of large-diameter monopiles are underestimated for extreme loads but overestimated for small operational loads. An extensive evaluation of the OGL method is presented here using three-dimensional numerical simulations. The evaluation has shown that the OGL method is not applicable for the design of large-diameter piles. Moreover, modified p-y formulations presented in the literature accounting for the effect of the pile diameter are also not generally suitable for piles with arbitrary dimensions and load levels. Therefore, the derivation of a new p-y approach is presented in detail. The new approach consists of "basic p-y curves" that are valid for a pile of infinite length exhibiting a constant horizontal deflection. In an iterative scheme, these basic curves are adapted depending on the pile deflection line and the pile length to account for a more realistic bedding resistance along the pile shaft. A comprehensive parametric study with 250 pile-soil systems reveals that the new p-y approach is able to predict the horizontal loadbearing behaviour as well as the local pile-soil interaction quite realistically.
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geotechnical Engineering and Engineering Geology
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In: Geotechnik, Vol. 38, No. 4, 02.12.2015, p. 267-288.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A new static p-y approach for piles with arbitrary dimensions in sand
AU - Thieken, Klaus
AU - Achmus, Martin
AU - Lemke, Katrin
PY - 2015/12/2
Y1 - 2015/12/2
N2 - When it comes to the general design of laterally loaded piles in offshore environments, bedding resistance is usually modelled by the p-y method recommended in the offshore guidelines (OGL). Several investigations presented in the literature indicate that the head displacements of large-diameter monopiles are underestimated for extreme loads but overestimated for small operational loads. An extensive evaluation of the OGL method is presented here using three-dimensional numerical simulations. The evaluation has shown that the OGL method is not applicable for the design of large-diameter piles. Moreover, modified p-y formulations presented in the literature accounting for the effect of the pile diameter are also not generally suitable for piles with arbitrary dimensions and load levels. Therefore, the derivation of a new p-y approach is presented in detail. The new approach consists of "basic p-y curves" that are valid for a pile of infinite length exhibiting a constant horizontal deflection. In an iterative scheme, these basic curves are adapted depending on the pile deflection line and the pile length to account for a more realistic bedding resistance along the pile shaft. A comprehensive parametric study with 250 pile-soil systems reveals that the new p-y approach is able to predict the horizontal loadbearing behaviour as well as the local pile-soil interaction quite realistically.
AB - When it comes to the general design of laterally loaded piles in offshore environments, bedding resistance is usually modelled by the p-y method recommended in the offshore guidelines (OGL). Several investigations presented in the literature indicate that the head displacements of large-diameter monopiles are underestimated for extreme loads but overestimated for small operational loads. An extensive evaluation of the OGL method is presented here using three-dimensional numerical simulations. The evaluation has shown that the OGL method is not applicable for the design of large-diameter piles. Moreover, modified p-y formulations presented in the literature accounting for the effect of the pile diameter are also not generally suitable for piles with arbitrary dimensions and load levels. Therefore, the derivation of a new p-y approach is presented in detail. The new approach consists of "basic p-y curves" that are valid for a pile of infinite length exhibiting a constant horizontal deflection. In an iterative scheme, these basic curves are adapted depending on the pile deflection line and the pile length to account for a more realistic bedding resistance along the pile shaft. A comprehensive parametric study with 250 pile-soil systems reveals that the new p-y approach is able to predict the horizontal loadbearing behaviour as well as the local pile-soil interaction quite realistically.
UR - http://www.scopus.com/inward/record.url?scp=84949493528&partnerID=8YFLogxK
U2 - 10.1002/gete.201400036
DO - 10.1002/gete.201400036
M3 - Article
AN - SCOPUS:84949493528
VL - 38
SP - 267
EP - 288
JO - Geotechnik
JF - Geotechnik
SN - 0172-6145
IS - 4
ER -