Strategies to increase the survivability of steel connections in fire

Safari, Pouria; Broujerdian, Vahid

doi:10.1016/j.istruc.2020.10.033

Cited by 5 publications

(2 citation statements)

References 26 publications

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“…(2019), Selamet and Garlock (2010), Pakala et al . (2012), Safari and Broujerdian (2020), Pakala and Kodur (2013), Lin et al . (2014), Sun et al .…”

Section: Introductionmentioning

confidence: 99%

“…Some research works have been conducted to reach a better view of the fire response of isolated or scaled connections in the steel structures as well as improve the steel design codes. Al-Jabri et al (2006), Mao et al (2009), Garlock and Selamet (2010), Gernay et al (2019), Selamet and Garlock (2010), Pakala et al (2012), Safari and Broujerdian (2020), Pakala and Kodur (2013), Lin et al (2014), Sun et al (2015) and Morovat et al (2018) have developed numerical models to evaluate the influence of several types of the connection on the behavior of steel structures at elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Performance of steel beam with welded top-seat angle connections at elevated temperatures

Rezaeian

Mansoori

Khajehdezfuly

2023

JSFE

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PurposeTop-seat angle connection is known as one of the usual uncomplicated beam-to-column joints used in steel structures. This article investigates the fire performance of welded top-seat angle connections.Design/methodology/approachA finite element (FE) model, including nonlinear contact interactions, high-temperature properties of steel, and material and geometric nonlinearities was created for accomplishing the fire performance analysis. The FE model was verified by comparing its simulation results with test data. Using the verified model, 24 steel-framed top-seat angle connection assemblies are modeled. Parametric studies were performed employing the verified FE model to study the influence of critical factors on the performance of steel beams and their welded angle joints.FindingsThe results obtained from the parametric studies illustrate that decreasing the gap size and the top angle size and increasing the top angles thickness affect fire behavior of top-seat angle joints and decrease the beam deflection by about 16% at temperatures beyond 570 °C. Also, the fire-resistance rating of the beam with seat angle stiffener increases about 15%, compared to those with and without the web stiffener. The failure of the beam happens when the deflections become more than span/30 at temperatures beyond 576 °C. Results also show that load type, load ratio and axial stiffness levels significantly control the fire performance of the beam with top-seat angle connections in semi-rigid steel frames.Originality/valueDevelopment of design methodologies for these joints and connected beam in fire conditions is delayed by current building codes due to the lack of adequate understanding of fire behavior of steel beams with welded top-seat angle connections.

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“…(2019), Selamet and Garlock (2010), Pakala et al . (2012), Safari and Broujerdian (2020), Pakala and Kodur (2013), Lin et al . (2014), Sun et al .…”

Section: Introductionmentioning

confidence: 99%