Behaviour of End-Plate Connections in 3D Frames Under Fire Conditions: Experimental Study

Khonsari, S. V.; Grayli, P. Vosough; Ghorbani, Ahmad; moghaddam, abolfazl

doi:10.1007/s13296-018-0027-9

Cited by 4 publications

(9 citation statements)

References 7 publications

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“…Based on the observations and comparison with previous study, the following conclusions can be drawn.The furnace temperature reached a high of 1,026 °C. A uniform temperature distribution with fair agreement with “modified” ISO 834 heating curve was achieved due to adjustability of the heating system.In comparison with the previous test on thick end-plate connections (Khonsari et al. , 2018), reducing the thickness of the end-plates from 10 mm of the previous test to 4 mm of this current one increased the maximum rotation from around 0.3 to 0.8 radians.…”

Section: Discussionsupporting

confidence: 53%

“…The present paper is a part of a broader research programme that aims to study the effect of the thickness of end-plates on the behaviour of steel structures under fire conditions. It is a direct continuation of a work commenced by Khonsari et al (2018) on flush end-plate connections. Whilst in the previous work quite thick end-plates were used, 10-mm thick ones, in the current study, on the contrary, quite thin end-plates were adopted, 4-mm thick ones.…”

Section: Jsfe 141mentioning

confidence: 86%

“…structures. This test was part of a comprehensive test programme and a direct continuation of the studies commenced by Khonsari et al. (2018).…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 86%

“…(1997) presented a methodology for fire testing on scaled structures and showed that the time axis of the heating curve for a half-scale structure should be shrunk by a factor of 1/4. The mathematics behind the scaling concept presented by O'Connor and his co-workers were later extensively elaborated by Khonsari et al. (2018).…”

Section: Test Arrangement and Set-upmentioning

confidence: 99%

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Behaviour of thin flush end-plate connections in a 3D bare steel frame under fire loading: experimental study

Khonsari

Nejati

Rahdan

et al. 2022

JSFE

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PurposeThe paper aims to report a fire test conducted on a three-dimensional frame in order to investigate the behaviour of bare steel flush end-plate connections with relatively low thickness at elevated temperatures.Design/methodology/approachA half-scale model was fabricated and exposed to modified (scaled) ISO 834 heating curve using a semi-open furnace. The maximum temperature inside the furnace reached 1,026 °C.FindingsThe rotations of connections are reported and compared with those of a previous study on an exactly the same model with thick end-plates. Various modes of failure such as local buckling of the beams flanges and lateral-torsional buckling of beams were observed during the test. Finally, the structure collapsed after 29 min of heating due to the fracture of weld between one of the beams and one of its attached end-plates whilst the other beam had undergone a maximum deflection of 35 cm (≈ 1/6 span length). Other observed failure modes included bolt fracture, bolt thread stripping and large inelastic deformation of the end-plates.Originality/valueAlthough the adoption of thin end-plates increased the rotational capacity of the connections, it did not improve the robustness of the structure under fire conditions.

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Section: Discussionsupporting

confidence: 53%

Section: Jsfe 141mentioning

confidence: 86%

“…structures. This test was part of a comprehensive test programme and a direct continuation of the studies commenced by Khonsari et al. (2018).…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 86%

Section: Test Arrangement and Set-upmentioning

confidence: 99%