Details
| Original language | English |
|---|---|
| Title of host publication | Numerical methods in geotechnical engineering IX |
| Editors | António S. Cardoso, José L. Borges, Pedro A. Costa, António T. Gomes, José C. Marques, Castorina S. Vieira |
| Volume | 2 |
| ISBN (electronic) | 9780429446924 |
| Publication status | Published - 28 Jun 2018 |
| Event | 9th European Conference on Numerical Methods in Geotechnical Engineering, NUMGE 2018 - Porto, Portugal Duration: 25 Jun 2018 → 27 Jun 2018 |
Abstract
In particular during storm events, a build-up of excess pore pressures may occur in the soil around cyclically loaded offshore foundations. Such accumulated excess pore pressure reduces the effective stresses in the soil and hence negatively affects the structural integrity. Even though the consideration of this degradation effect on the bearing capacity is commonly demanded by the involved certification or approval bodies, no general applicable and accepted method for the calculative verification currently exists. The paper presents a novel approach which allows for the transfer of the soil behavior obtained in cyclic DSS tests to the bearing capacity of the foundation structure by means of a 3D numerical model. The respected transfer function enables the consideration of site-specific cyclic DSS test results by taking into account the mean stress, the cyclic shear stress amplitude and the number of load cycles at each integration point of the numerical model. Hence, the numerical approach may contribute to the optimisation of common foundation solutions as well as to the verification of innovative foundation structures even in complex soil conditions.
ASJC Scopus subject areas
- Mathematics(all)
- Numerical Analysis
- Earth and Planetary Sciences(all)
- Geotechnical Engineering and Engineering Geology
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Numerical methods in geotechnical engineering IX. ed. / António S. Cardoso; José L. Borges; Pedro A. Costa; António T. Gomes; José C. Marques; Castorina S. Vieira. Vol. 2 2018.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Numerical method for evaluation of excess pore pressure build-up at cyclically loaded offshore foundations
AU - Achmus, Martin
AU - Saathoff, Jann Eike
AU - Thieken, Klaus
N1 - Publisher Copyright: © 2018 Taylor & Francis Group, London, UK. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2018/6/28
Y1 - 2018/6/28
N2 - In particular during storm events, a build-up of excess pore pressures may occur in the soil around cyclically loaded offshore foundations. Such accumulated excess pore pressure reduces the effective stresses in the soil and hence negatively affects the structural integrity. Even though the consideration of this degradation effect on the bearing capacity is commonly demanded by the involved certification or approval bodies, no general applicable and accepted method for the calculative verification currently exists. The paper presents a novel approach which allows for the transfer of the soil behavior obtained in cyclic DSS tests to the bearing capacity of the foundation structure by means of a 3D numerical model. The respected transfer function enables the consideration of site-specific cyclic DSS test results by taking into account the mean stress, the cyclic shear stress amplitude and the number of load cycles at each integration point of the numerical model. Hence, the numerical approach may contribute to the optimisation of common foundation solutions as well as to the verification of innovative foundation structures even in complex soil conditions.
AB - In particular during storm events, a build-up of excess pore pressures may occur in the soil around cyclically loaded offshore foundations. Such accumulated excess pore pressure reduces the effective stresses in the soil and hence negatively affects the structural integrity. Even though the consideration of this degradation effect on the bearing capacity is commonly demanded by the involved certification or approval bodies, no general applicable and accepted method for the calculative verification currently exists. The paper presents a novel approach which allows for the transfer of the soil behavior obtained in cyclic DSS tests to the bearing capacity of the foundation structure by means of a 3D numerical model. The respected transfer function enables the consideration of site-specific cyclic DSS test results by taking into account the mean stress, the cyclic shear stress amplitude and the number of load cycles at each integration point of the numerical model. Hence, the numerical approach may contribute to the optimisation of common foundation solutions as well as to the verification of innovative foundation structures even in complex soil conditions.
UR - http://www.scopus.com/inward/record.url?scp=85061312436&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85061312436
SN - 9781138544468
VL - 2
BT - Numerical methods in geotechnical engineering IX
A2 - Cardoso, António S.
A2 - Borges, José L.
A2 - Costa, Pedro A.
A2 - Gomes, António T.
A2 - Marques, José C.
A2 - Vieira, Castorina S.
T2 - 9th European Conference on Numerical Methods in Geotechnical Engineering, NUMGE 2018
Y2 - 25 June 2018 through 27 June 2018
ER -