Thermomechanical performance of offshore topside steel structure exposed to localised fire conditions

Manco, Miguel R.; Vaz, Murilo Augusto; Cyrino, Júlio Cesar Ramalho; Landesmann, Alexandre

doi:10.1016/j.marstruc.2020.102924

Cited by 12 publications

(3 citation statements)

References 32 publications

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“…Based on a non-stationary temperature field model constructed for fire in tall and large space buildings, the authors adopted a nonlinear finite element numerical analysis method with time integral effect taken into account to build a fire resistance numerical model for large-span pre-stressed steel structures, and used a beam structure fire-resistance calculation example to discuss the impact of different fire source positions on the fire-resistance of pre-stressed steel structures. Manco et al [23] reported the results of a numerical investigation work aiming at assessing the structural safety of an actual offshore topside steel structure exposed to accidental localized fire conditions, and discussed the nonlinear thermo-mechanical and ultimate strength behaviors attained via two means: sophisticated CFD (Computational Fluid Dynamics) and LF-ESF (Localised Fire with Ellipsoidal Solid Flame), which were previously developed and validated by the authors. CFD-based approaches usually use the input energy given by a combustion model to solve nearly compressible flows, and make accurate evaluation on the fluid's thermal response in the entire duration of a simulated accident.…”

Section: Introductionmentioning

confidence: 99%

Thermal Response and Damage Features of Fabricated Steel Structures under Fire

Lü¹,

Wei²

2023

IJHT

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Figuring out the thermal response and damage features of fabricated steel structures under fire conduces to enhancing the fire resistance of steel structures and lowering the probability of fire accidents. Available methods are able to simulate complex fire situations, but their accuracy is affected by the adopted models and calculation methods. For this reason, this paper researched the thermal response and damage features of fabricated steel structures under fire. At first, the thermal response of fabricated steel structures under fire was analyzed, the ultimate bearing capacity and the fire resistance was calculated and checked. Then, the evolution of fatigue damage of fabricated steel structures under fire was analyzed, and the fatigue damage evolution method and its flow were given. At last, combining with actual cases, the thermal response and damage features of fabricated steel structures under fire were examined experimentally, and the results verified the validity of the proposed analysis method.

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Section: Introductionmentioning

confidence: 99%

Thermal Response and Damage Features of Fabricated Steel Structures under Fire

Lü¹,

Wei²

2023

IJHT

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“…En este mismo contexto, se abordan otros estudios (Manco et al, 2013;Manco et al, 2020;Manco et al, 2021a;Manco et al, 2021b;Paya & Garlock, 2012;Ryu et al, 2021;Xu et al, 2021& Zhang et al, 2013 de diversas estructuras metálicas sometidas a diversos escenarios de incendio; así como, la transferencia de informaciones entre modelos FDC-FEM. El modelado de estas estructuras es relativamente más simple que en los casos mencionados en el párrafo anterior, debido a que se trabaja únicamente con un material.…”

Section: Introductionunclassified

Análisis Térmico De Vigas De Concreto Reforzado Sometidas a Incendio Localizado Usando Modelos FDC-Fem

Miguel Manco Rivera,

Miguel Celis Carbajal,

Gustavo Guarniz Avalos

2023

HYW

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La versatilidad y la alta capacidad de carga del concreto reforzado son las principales razones de su masivo empleo en diversas infraestructuras como edificios, puentes, entre otras. Fuera de las cargas normales de operación estas estructuras, pueden ser sometidas a cargas accidentales como las generadas por incendios localizados. La normativa actual ofrece algunas opciones de análisis de esta clase de fenómenos. Los modelos basados en la Fluidodinámica Computacional (FDC) son los más adecuados; sin embargo, dada su complejidad su uso es poco extendido, optándose por metodologías simplificadas. Este trabajo muestra una metodología que acopla modelos en FDC para la simulación del incendio y térmicos en el Elementos Finitos (EF), para la obtención del campo de temperaturas de una viga de concreto reforzado sometida a un escenario de incendio localizado. El análisis se realizó con un modelo unidireccional secuencialmente acoplado en el cual, después de extraer los coeficientes de transferencia de calor y las temperaturas de la superficie adiabática del modelo en FDC, se incluyen estos valores (previa manipulación mediante un programa en FORTRAN) en el modelo de EF, para obtener los campos de temperaturas.Con los resultados obtenidos se concluye como el empleo de esta metodología, permite estimar adecuadamente las temperaturas en la viga para el caso considerado, siendo posible utilizarlos en un posterior análisis termo-mecánico.

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“…For a long time, people have widely used spatial structures, such as Convention and Exhibition Centers [1] Sports Stadiums [2], Industrial Plants [3], Transportation Hubs [4], Military Industry Barracks [5], Ocean Platforms [6], and Tourist Attractions [4]. Compared with the high strength of their material (usually structural steel), their stability is weaker, and they are sensitive to various structural damages and defects.…”

Section: Introductionmentioning

confidence: 99%

A New Response Surface Stochastic Analysis Method for Spatial Structure Stability—The Reticulated Shell Structure as an Example

Liu

Tondini

et al. 2021

Buildings

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For a long time, spatial structures have been widely used. However, compared with the high strength of their material, their stability is weak, and especially sensitive to damage and defects. This feature has increased the engineering industry’s high requirements for their stability analysis. As we all know, this problem is more prominent for the reticulated shell structure, which is a classic representative of the spatial structure. However, in the current analysis methods for the stability of reticulated shells, the deterministic analysis method cannot consider the random characteristics of defects. Other random methods, such as the random defect modal method, and many improved methods, require more samples and calculation time. This unfavorable situation makes its engineering application greatly restricted. In addition, the random modal superposition method and derivation method based on Monte Carlo has not fundamentally changed this limitation. In order to fundamentally overcome this traditional shortcoming, this paper comprehensively studies the advantages of the high accuracy of the random defect modal method and the improved method, and at the same time, investigates the speed advantage of the response surface method, and then creates a new stochastic analysis method based on the response surface method. Finally, the analysis results of the calculation examples in this paper prove that it successfully balances and satisfies the dual requirements of accuracy and speed required for calculating the stability of the reticulated shell structure. Moreover, it has universal applicability to different forms of reticulated shells, such as classic 6-point flat domes, traditional reticulated shell structures, and bionic reticulated shell structures, and even other types of spatial structures.

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Thermomechanical performance of offshore topside steel structure exposed to localised fire conditions

Cited by 12 publications

References 32 publications

Thermal Response and Damage Features of Fabricated Steel Structures under Fire

Thermal Response and Damage Features of Fabricated Steel Structures under Fire

Análisis Térmico De Vigas De Concreto Reforzado Sometidas a Incendio Localizado Usando Modelos FDC-Fem

A New Response Surface Stochastic Analysis Method for Spatial Structure Stability—The Reticulated Shell Structure as an Example

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