A time-domain fatigue damage assessment approach for the tripod structure of offshore wind turbines

F Lu, K Long, Y Diaeldin, A Saeed, J Zhang… - … Energy Technologies and …, 2023 - Elsevier
Welded features in the tubular joints are one of the most severe sources of fatigue failure in
supporting structure for offshore wind turbines (OWTs). Therefore, fatigue resistance …

[HTML][HTML] Optimal probability distribution for SCFmax in KT-joints strengthened with concrete in wind turbine support structures

E Zavvar, AG Majidi, PR Santos… - Journal of Constructional …, 2024 - Elsevier
The appropriate probability distributions for maximum SCFs in KT-joint filled with three
different types of concrete under 4 different axial loads are studied. The process started with …

Parametric study and formula for SCFs of FRP-strengthened CHS T/Y-joints under out-of-plane bending load

H Nassiraei, P Rezadoost - Ocean Engineering, 2021 - Elsevier
Highlights•The SCFs in tubular T/Y-joints reinforced with FRP were investigated.•263 FE
models were created for the parametric study.•The effect of the FRP layer numbers, FRP …

Stress concentration factors in FRP-strengthened steel tubular KT-joints

AS Hosseini, E Zavvar, H Ahmadi - Applied Ocean Research, 2021 - Elsevier
This paper presents a brand new application of the fiber-reinforced polymer (FRP) materials
as a strengthening tool for reinforcing offshore steel tubular KT-joints to reduce the stress …

Effects of fibre reinforced polymer on stress concentration factors in uniplanar DKT-joints subjected to the compression loading

E Zavvar, CG Soares - Trends in Maritime Technology and …, 2022 - taylorfrancis.com
In the present study, the stress concentration factors (SCFs) in uniplanar DKT-joint
reinforced with different fibre reinforced polymers (FRPs) under the compression loading are …

[HTML][HTML] Analysis of tubular joints in marine structures: A comprehensive review

E Zavvar, P Rosa-Santos, E Ghafoori, F Taveira-Pinto - Marine Structures, 2025 - Elsevier
The use of tubular joints (TJs) is evident, although they are commonly utilized in different
areas, such as buildings, bridges, offshore structures, and renewable energy structures …

Parametric study of stress concentration factors in KT connections reinforced with concrete subjected to axial loads

E Zavvar, G Giannini, F Taveira-Pinto, PR Santos - Ocean Engineering, 2024 - Elsevier
This research investigates the effect of stress concentration factors (SCFs) in KT-connections
retrofitted with concrete under axial loadings. 972 finite element models of KT-connections …

Development of a probability distribution model for the SCFs in tubular X-connections retrofitted with FRP

H Nassiraei, P Rezadoost - Structures, 2022 - Elsevier
In this study, results of performing 324 FE analyses on 108 circular hollow section (CHS) X-
connections with fiber reinforced polymer (FRP) have been used to derive a probability …

Numerical analysis and discussion on the hot-spot stress concept applied to welded tubular KT joints

BV Ávila, J Correia, H Carvalho, N Fantuzzi… - Engineering Failure …, 2022 - Elsevier
Nominal stresses have been used for a long time for the assessment of fatigue resistance of
welded joints, however, this approach has strong limitations since the definition of the …

Stress concentration factors of CFRP-reinforced tubular K-joints via Zero Point Structural Stress Approach

HS Mohamed, L Zhang, YB Shao, XS Yang… - Marine Structures, 2022 - Elsevier
The SCFs of the tubular K-joints reinforced with carbon fiber reinforced polymer (CFRP)
were computed using the zero-point structural stress (ZPSS) method. After employing …