Blar i Vitenskapelige publikasjoner (TN-IMBM) på forfatter "Ersdal, Gerhard"
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Buckling capacity of simulated patch corroded tubular columns – laboratory tests
Vo, Tri Minh; Hestholm, Kristoffer; Ersdal, Gerhard; Oma, Narve; Sivertsvik, Matias (Peer reviewed; Journal article, 2019)This paper presents the experimental test results for the buckling capacity of tubular columns exposed to simulated unsymmetrical patch corrosion damage. These tests were performed to investigate how the results of these ... -
Capacity of Concrete Structures with Corroded Reinforcement and Prestressing Tendons
Sigvaldsen, Marie; Ersdal, Gerhard; Markeset, Gro; Samarakoon, Mudiyansele Samindi Manjula K; Langeteig, Magne (Peer reviewed; Journal article, 2021)The main degradation mechanism for concrete structures is corrosion of the reinforcement and prestressing tendons. Management of structures with such degradation requires detailed understanding of their remaining strength ... -
Experimental and numerical study of the elastic SCF of tubular joints
Atteya, Mostafa; Mikkelsen, Ove; Wintle, John; Ersdal, Gerhard (Peer reviewed; Journal article, 2021-07)This paper provides data on stress concentration factors (SCFs) from experimental measurements on cruciform tubular joints of a chord and brace intersection under axial loading. High-fidelity finite element models were ... -
Experimental assessment of cracked tubular joints repaired with crack-deflecting holes and weld-toe grinding
Riise, Simen; Atteya, Mostafa Ahmed; Mikkelsen, Ove; Ersdal, Gerhard (Peer reviewed; Journal article, 2023)Tubular joints in offshore structures for energy production are exposed to cyclic loading and may experience fatigue cracking. Presently, the inspection method commonly used for such structures will primarily detect whether ... -
Inspection planning for fatigue cracks in offshore structures by Monte Carlo simulations
Neeraas, Håkon; Ersdal, Gerhard; Oma, Narve; Hellevig, Nils-Christian (Peer reviewed; Journal article, 2019)Probability-informed inspection planning has traditionally a tendency to produce longer inspection intervals for older structures in contrast with the intuitive assumption that shorter inspection intervals are needed. In ... -
Investigation of updating methods for probability-informed inspection planning for offshore structures
Ersdal, Gerhard; Oma, Narve (Peer reviewed; Journal article, 2019)The paper presents a novel process for probability-informed inspection planning based on the following principles. 1) A description of the strength of knowledge about a problem shall be included and be accounted for in the ... -
Statistical evaluation of tubular joint SCFs from test data and finite element analyses
Ersdal, Gerhard; Atteya, Mostafa Ahmed; Mikkelsen, Ove (Peer reviewed; Journal article, 2023)Stress concentration factors (SCF) derived from both FEA and measurements from laboratory experiments are associated with uncertainties. To understand these uncertainties, SCF values can be determined from a series of tests ...