Reuse of structural steel components from decommissioned offshore structures
Master thesis
Permanent lenke
https://hdl.handle.net/11250/3084453Utgivelsesdato
2023Metadata
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Sammendrag
This thesis presents the theoretical foundation for reusing steel from decommissionedoffshore structures in onshore construction projects as a green alternative to newproduction steel. This would open up a new source of materials in the supply chainof steel components, and contribute to a reduction in the demand of new productionsteel. Although the conditions and circumstances are different, reuse of offshore steelcarry many similarities with onshore steel reuse. This thesis utilizes and modifiesalready existing guidelines for onshore reuse to determine the feasibility. Included inthe feasibility study is one of the most deciding factors of the offshore reuse method,which is the quality check. The thesis proposes a quality check procedure whichis based on current guidelines for standards on inspection, testing, and technicaldelivery conditions.The theory presented in this thesis is put to the test in a case study, where theresult indicate that despite significant environmental benefits, reused offshore steelis not yet a viable option in procurement of materials in the onshore constructionindustry. The feasibility study reveals a reusability index of 51,5%, which is lowerthan what would constitute a viable reuse operation. However, the reusability indexis predicted to increase if the reuse operation is centralized and streamlined by thedecommissioning companies.