Performance of beam-to-column joints in fire—A review

Al‐Jabri, Khalifa; Davison, Buick; Burgess, Ian

doi:10.1016/j.firesaf.2007.01.002

Cited by 62 publications

(20 citation statements)

References 37 publications

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“…Fig. 1 shows different forms of curve-fitting representation of joint's characteristics [4]. The reliability of the model is judged based on its ability to describe the entire behaviour of the joint.…”

Section: Curve-fit Modelsmentioning

confidence: 99%

“…usually beneath composite floor) and the smaller surface area to volume ratio of the joint compared with the higher surface area ratio of the beam. Beam-to-column joints have been found to be of great significance in influencing structural behaviour at ambient and elevated temperatures [2,4]. Observations from full-scale fire tests and from damaged structures confirm that connections have a considerable effect on the survival time of structural members in fire due to their ability to distribute forces to the adjacent cool members [4].…”

Section: Introductionmentioning

confidence: 99%

“…There are factors affecting the accuracy of numerical models, which include the meshing of the configuration (the optimum mesh size), choice of elements, material behaviour of the joint's components and, most importantly, modelling of the contact behaviour between elements. Accurate prediction of the structural behaviour of steel beam-to-column connections, by estimating the local deformations and induced stresses, is necessary in assessing the capacity of the connections and preventing their failure [4].…”

Section: Introductionmentioning

confidence: 99%

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Modelling and simulation of beam-to-column joints at elevated temperature: A review

Al‐Jabri

2011

Journal of the Franklin Institute

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Section: Curve-fit Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modelling and simulation of beam-to-column joints at elevated temperature: A review

Al‐Jabri

2011

Journal of the Franklin Institute

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“…EN 1993-1-2:2005(Al-Jabri et al, 2008, suggests temperatures at joints of between 62% and 88% of that in the beam lower flange temperature at mid-span. This is attributed to the additional material around joints (column, end-plate, concrete slab, etc.)…”

Section: Recent Advances On Modelling Of Steel and Composite Joints Imentioning

confidence: 99%

“…While the sagging bending moment near the midspan is reducing, the hogging moment developed at the joint may increase to a level beyond its resistance (Liu, 1998). EN 1993-1-2:2005(Al-Jabri et al, 2008 suggests temperatures at joints of between 62% and 88% of that in the beam lower flange temperature at mid-span. This is attributed to the additional material around joints (column, end-plate, concrete slab, etc.)…”

Section: Introductionmentioning

confidence: 99%

An advanced ANN model for predicting the rotational behaviour of semi-rigid composite joints in fire using the back-propagation paradigm

Al‐Jabri

Al-Alawi

2010

International Journal of Steel Structures

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This paper describes an artificial neural networking (ANN) model developed to predict the behaviour of semi-rigid composite joints at elevated temperature. Three different semi-rigid composite joints were selected, two flexible end-plates and one flush end-plate. Seventeen different parameters were selected as input parameters representing the geometrical and mechanical properties of the joints as well as the joint's temperature and the applied loading, and used to model the rotational capacity of the joints with increasing temperatures. Data from experimental fire tests were used for training and testing the ANN model. Results from nine experimental fire tests were evaluated with a total of 280 experimental cases. The results showed that the R 2 value for the training and testing sets were 0.998 and 0.97, respectively. This indicates that results from the ANN model compared well with the experimental results demonstrating the capability of the ANN simulation techniques in predicting the behaviour of semi-rigid composite joints in fire. The described model can be modified to study other important parameters that can have considerable effect on the behaviour of joints at elevated temperatures such as temperature gradient, axial restraints, etc.

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Finite element study on the behaviour of free from damage connections under fire

Santos,

Santiago,

Craveiro

et al. 2023

ce papers

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The free from damage connection, developed during the recent RFCS FREEDAM has shown to be a promising solution to dissipate high amounts of energy due to its sliding system given by the friction damper with slotted holes, located at the lower beam flange. Additionally, this sliding mechanism proved to be also efficient in the event of exceptional loading scenarios such as impact loads or even in column loss scenarios, because it allows the dissipation of part of the action through slipping and, on the other hand, gives an extra “elastic” ductility to the connection since, up to the end of the slip, the components of the connection are designed to remain in the elastic range.In this paper, this specific behaviour is exploited in the case of fire scenario. During fire events, axial forces can develop in the beams (initially in bending, only) due to the expansion of the steel elements and the restraint provided by the boundary conditions. For the cases where the high axial forces develop, the moment‐rotation behaviour of the connections will change due to the interaction between the axial forces (N) and bending moment (M) as well as the effects due to the increase in temperature. The the use of connections such as the free from damage connection is interesting also from this point of view since it delays the development of great axial forces due to its slipping mechanism. This analysis is carried out through FEM analysis using ABAQUS software.

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Performance of beam-to-column joints in fire—A review

Cited by 62 publications

References 37 publications

Modelling and simulation of beam-to-column joints at elevated temperature: A review

Modelling and simulation of beam-to-column joints at elevated temperature: A review

An advanced ANN model for predicting the rotational behaviour of semi-rigid composite joints in fire using the back-propagation paradigm

Finite element study on the behaviour of free from damage connections under fire

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