Static strength of tubular T/Y-joints reinforced with collar plates at fire induced elevated temperature

Nassiraei, Hossein

doi:10.1016/j.marstruc.2019.102635

Cited by 45 publications

(11 citation statements)

References 20 publications

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“…Nevertheless, the constants k 3 , k 5 , and k 6 should not be construed as weighting coefficients for joint resistance, as they pertain specifically to the sleeve length coefficient's influence. SPSS [63] was chosen to evaluate the fitness and applicability, resulting in the derivation of a comprehensive practical equation presented in Equation (8). The data used for this analysis excluded joint models that failed in PHSE.…”

Section: Predicted Strength Equationmentioning

confidence: 99%

“…To address this, reinforcement techniques have gained recognition as cost-effective methods for prolonging the lifespan of existing tubular structures, particularly given the high risks associated with the complete replacement of damaged members in marine settings. Conventional reinforcement methods for tubular joints typically involve welding metal stiffeners, such as collar plates [6][7][8][9], double plates [10,11], or external rings [12]. Additionally, the use of fiber-reinforced polymer (FRP) has emerged as an excellent alternative for combating environmental corrosion and improving structural performance in terms of joint strength and stress distribution [13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

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Finite Element Analysis of Corrosion Tubular T-Joint Repaired with Grouted Clamp

Deng,

Guo,

Zhu

et al. 2023

Advances in Civil Engineering

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A finite element (FE) analysis of corroded circular hollow section T-joints repaired using grouted clamps is presented in this study. To ensure an accurate simulation, experiments on a T-joint with uniform corrosion and an intact T-joint with grouted clamp are reproduced separately using an FE model. The experimental and FE modeling results correlate closely, displaying similar failure behaviors and load–displacement responses. Subsequently, a total of 56 FE T-joint models with varying degrees of corrosion on the chord, repaired by grouted clamp, were then analyzed numerically. The corrosion was artificially applied to the chord’s outer surface at depths of 10%, 20%, and 30% of the chord’s thickness. The models also account for variations in joint geometry, dictated by parameters β and γ, which range from 0.565 to 0.678 and from 21 to 28, respectively. Furthermore, grouted clamp’s properties were examined, including sleeve length, thickness, strength, as well as the thickness and strength of the grout, in relation to the complexity of the repair. The grouted clamp demonstrated significant repair capability, increasing the ultimate strength of the corroded joint by up to 2.23 times. Reinforcements that are both thicker and longer substantially enhance the joint’s ultimate strength. However, inappropriate repair construction results in an abrupt termination of the load–displacement curve and a brittle failure phenomenon outside reinforced chord region. Additional weight from the grouted clamp requires reasonable control, and sleeve overlapping ratio should be guaranteed to be greater than 0.7. The joint bearing capacity can be efficiently increased by thicker grouts and sleeves only in ductile failure cases. The confinement effect and mechanism of the grouted clamp in joint deformation were visually analyzed as stress distribution from FE analysis results. Finally, a prediction equation is proposed to estimate the static strength of the repaired joint through regression analysis.

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Section: Predicted Strength Equationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Corrosion Tubular T-Joint Repaired with Grouted Clamp

Deng,

Guo,

Zhu

et al. 2023

Advances in Civil Engineering

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“…These can be located inside the gondola, on the tower, or near the base of the tower. You must watch out if they are dry or contain any oil and, in this case, if there is a containment system for this oil in the event of a leak, in addition to using fire-resistant oils [ 27 ].…”

Section: International Fire Protection Guidelines and Certificatementioning

confidence: 99%

Fire risk assessments and fire protection measures for wind turbines: A review

You,

Shaik,

Rokonuzzaman

et al. 2023

Heliyon

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“…The contact nonlinearity was considered in the FE simulation, and the surface-to-surface contact was used to reflect the load transfer between members. The stiffness of each member of the cantilever bracket was similar, and the flexible–flexible contact form was adopted [ 27 , 28 ]. When setting the contact surface of the cantilever bracket, the channel steel was the contact surface, and the square tube and right-angle support were the target surface.…”

Section: Numerical Simulationmentioning

confidence: 99%

Numerical Simulation and Experimental Investigation on Two Strengthening Schemes of Cantilever Brackets

Gui-lin

Zhu

et al. 2022

Materials

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Cantilever brackets have been widely used in buildings to provide support for all kinds of pipes. In order to improve the bearing capacity of cantilever brackets, two types of reinforcement schemes are proposed, one is to sleeve a pipe, and the other is to add a haunch. Their mechanical properties are studied by numerical simulation and experimental investigation. First, the non-linear finite element (FE) simulation analysis was carried out, and the structural bearing capacity, stress distribution, and failure modes were discussed. Then, the full-scale model tests were completed to provide validation of the FE analysis. On this basis, a comparison of the FE results and test results of three kinds of cantilever brackets was discussed in detail. The results show that two reinforcement schemes can enhance the bearing capacity of the cantilever bracket significantly by 38.3% and 25.9%, respectively, and they are applicable for the reinforcement of existing cantilever brackets.

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Static strength of tubular T/Y-joints reinforced with collar plates at fire induced elevated temperature

Cited by 45 publications

References 20 publications

Finite Element Analysis of Corrosion Tubular T-Joint Repaired with Grouted Clamp

Finite Element Analysis of Corrosion Tubular T-Joint Repaired with Grouted Clamp

Fire risk assessments and fire protection measures for wind turbines: A review

Numerical Simulation and Experimental Investigation on Two Strengthening Schemes of Cantilever Brackets

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