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H2020Individual fellowship2021–2023

SUBSLIDE · Submarine Landslides and their impacts on Offshore Infrastructures

Horizon 2020 — Marie Skłodowska-Curie Actions

Duration
2021-06-01 → 2023-05-31
EU contribution
€214,159
Participants
1
Scheme
MSCA-IF

Lines connect the coordinator with its partners.

Results in brief

Submarine Landslides and their impacts on Offshore Infrastructures

The overall research objective of SUBSLIDE is to develop a novel numerical tool capable of (a) simulating all stages of submarine landslides to understand the full mechanisms and (b) quantifying the impact forces of submarine landslides on offshore structures. Therefore, SUBSLIDE sets out four specific research objectives (ROs) and one training objective (TO) as follows: RO1: Develop a fully coupled soil-fluid-structure MPM model capable of analysing pore water pressure development, landslide-induced waves, and the impact forces of submarine landslides. RO2: Develop a critical-state soil model capable of reproducing the mechanical responses of the sediments as measured in laboratory. RO3: Quantify trigger mechanisms (e.g. magnitude of earthquakes) of a submarine landslide and their influences on post-failure characteristics. RO4: Quantify impact forces of potential submarine slides on anchors and mooring systems in Bjørnafjorden. TO: Maximize my career prospects by developing multidisciplinary research skills in landslide hazard assessment along with complementary skills including grant writing, mentoring, and dissemination.

Data: CORDIS, © European Union

Project objective

Due to significant expansion of offshore structures in Europe, estimating potential submarine slides is important for the safe design of offshore structures so that they can withstand the impact of landslides. However, state-of-the-art submarine landslide modelling (a) fails to understand the triggering mechanism involving pore pressure development; (b) are unable to account for complex sediment properties; and (c) cannot quantify accurately impact forces of submarine slides on offshore structures. This poses a grand challenge: to simulate the entire process of submarine slides considering the complex interaction among saturated sediment, seawater, and offshore structures. To address this challenge, SUBSLIDE aims to develop a novel soil-fluid-structure interaction model capable of handling critical-state soil mechanics (saturated sediments), fluid mechanics (seawater), and solid mechanics (structures) in a unified manner. I will implement the formulation using the Material Point Method, an advanced numerical method for modelling extremely large deformation of materials in the high-performance Uintah computing framework. The expected outcome is a novel tool for simulating the full process of submarine slides to understand their full mechanisms and estimating impact forces on offshore structures. SUBSLIDE combines my expertise in computational mechanics, the expertise of the host institution in constitutive soil modelling, and the expertise of the secondment host in the measurement and analysis of landslides. The results will constitute a scientific breakthrough in submarine landslide modelling. Also, SUBSLIDE will assist the Norwegian Public Road Administration in predicting the potential submarine landslides through dissemination and exploitation activities. The fellowship will accelerate my academia career, establish my research independence and facilitate new collaborations for building a research group renowned for state-of-the-art computational geomechanics.

Original text from CORDIS.

Participants

  • NORGES TEKNISK-NATURVITENSKAPELIGE UNIVERSITET NTNU · TrondheimCoordinatorNorway

Links

Data: CORDIS, © European Union