Finite element analysis of thermo-active piled rafts
Finite element analysis of thermo-active piled rafts
Thermo-active geo-structures are recently explored options for utilising geothermal energy as a renewable energy source. One of the most used forms of thermo-active geo-structures are the thermally active piles, which are typically installed in a group and connected with a raft. The response of piles in closely spaced thermo-active piled rafts is found to be different compared to a single isolated thermo-active pile. The mechanical design of piled rafts usually concentrates on achieving a reduction of differential settlements across the raft and uniform loading of piles. This paper is focused on the behaviour of a piled raft subjected to both mechanical and thermal loads. A set of fully coupled hydro-mechanical finite element analyses is performed to quantify the mechanical response of the piles in a piled raft. Subsequently, fully coupled thermo-hydro-mechanical analyses are performed, introducing seasonal cooling and heating cycles in a single year, with particular emphasis on examining the evolution of axial forces in individual piles with respect to the different scenarios of thermally active piles in a pile group.
Georgios Georgiadis; Lidija Zdravkovic; David Malcolm Potts
10th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE2023)
13. Geo-energy & energy geotechnics
https://doi.org/10.53243/NUMGE2023-241
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