Fire tests of steel‐to‐timber connections with high fire resistance

Dhima, Dhionis; Audebert, Maxime; Bouchaïr, Abdelhamid; Pinoteau, Nicolas

doi:10.1002/fam.3083

Cited by 2 publications

(4 citation statements)

References 12 publications

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“…Audebert et al, proposed a simplified design method based on reviewing experimental data published since 1999, and a recent experimental program for high capacity, high fire resistance timber connections with lateral timber members thicker than 100 mm. 18,19 All the connections tested or evaluated were timber-to-timber (T-T-T) or steel-to-timber (T-S-T) connections with one, two, or three members slotted in steel plates. The connections were assembled using dowel and/or bolts and were subjected to longitudinal tension.…”

Section: Steel-to-timber Splice Connections With Parallel-to-grain Te...mentioning

confidence: 99%

“…Audebert et al, stated that this type of connection is the predominant connection used in mass timber construction. Dhima et al, tried to observe “ whether the slot between the timber members, above and below the steel plate in the transverse direction, had an influence on the fire behaviour of the connections .” 19 These slots were therefore filled in some specimens and left unfilled in others in the first test. In some of the specimens, a 2 to 6 mm gap between the left and right parts of the connection in the longitudinal direction appeared.…”

Section: Introductionmentioning

confidence: 99%

“…This gap was filled when possible “ to avoid undesirable heating in the middle of the steel plate ” with glued wood‐based strips (plywood). Dhima et al, concluded that the temperature level inside the connection strongly impacts the failure of the connection and, as part of the design recommendations, states that gaps between lateral timber members of more than 6 mm should be filled with a wood‐based strip, to optimise the FRR 19 . Gaps of 6 mm and smaller are therefore considered safe.…”

Section: Introductionmentioning

confidence: 99%

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Experimental testing on timber connections considering the influence of gap size and intumescent sealants

du Plessis,

Sulon,

Streicher

et al. 2023

Fire and Materials

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This paper investigates the influence of gap size (openings/spaces between two structural members) and the presence of intumescent sealants on the development of temperature when timber connections are exposed to fire conditions. The experimental results of 21 samples representing a concealed steel‐to‐timber connection configuration that was exposed with a 0, 3, 6, and 10 mm gap to the ISO834 standard fire for 120 min are presented. Half of the samples in each sample group were protected with an intumescent fire protection sealant. The temperatures in the timber were measured at various locations around the gap and directly next to the steel component. The experimental results show that the presence of a gap increases the temperature of the timber more than predicted by the thermal penetration models available, with current code guidelines (e.g., Eurocode 5) possibly being non‐conservative. The use of an intumescent fire protection sealant in the gap is shown to be an effective protection method, but that the application configuration is important to ensure effective protection, especially as the gap becomes smaller. The results also show that the use of an intumescent fire protection sealant in a gap increases the predictability of the temperatures in the timber in longer duration fires. Unprotected samples and 0 mm gap samples exhibited large variability in the thermal development outcomes over time.

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Section: Steel-to-timber Splice Connections With Parallel-to-grain Te...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental testing on timber connections considering the influence of gap size and intumescent sealants

du Plessis,

Sulon,

Streicher

et al. 2023

Fire and Materials

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“…In all these tests, the fire-resistance duration was limited to 60 min, while in another experimental study, Dhima [48] targeted fire-resistance ratings reaching 90 and 120 min on bolted and doweled WSW connections. Two configurations of connections with one or two slotted-in steel plates were tested with varying timber thicknesses, fastener diameters, and load ratios.…”

Section: Scientific and Technical Center For Building (Cstb)mentioning

confidence: 99%

Performance of Timber-to-Steel Bolted Connections Exposed to Fire

Alam

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The use of wood as structural elements in buildings is very common in Canada. However, because wood is combustible, the National Building Code of Canada [1] restricts the use of wood to smaller buildings compared to noncombustible buildings. Wood to steel connections, composed of heavy timber, steel plates and bolts, are used to assemble wood components together. The fire performance of timber connections is complex due to the variety of connection types, geometries and fastener arrangements, as well as the properties of the materials under fire exposure.This study investigates the fire performance of timber-to-steel bolted connections under tension loading by conducting fire tests, developing finite element models, and creating simplified empirical calculation methods. Two types of timber-to-steel bolted connections considered in this study are wood-steel-wood (WSW) and steel-wood-steel (SWS).In the experimental testing of this research, a series of full-scale fire tests was conducted on these connections loaded in tension exposed to either the standard CAN/ULC-S101 [2] or a non-standard time-temperature fire curves. Results showed that the fire resistance of all WSW and SWS connections were less than 45 min, which is a minimum fire-resistance rating for Canadian code compliance. The results also showed that the WSW specimens I am grateful for Ba Lam-Thien for his support in helping set up all the tests for this research study. I would also like to thank my colleagues, Samuel Bright Amankwah Boadi and Matt Turco for your assistance in constructing and running the tests. Thank you all for your support during the testing.Thank you to my family, my wife's family, and my friends for your continuous support in good and bad times. Without you I wouldn't have been able to complete this study.

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Fire tests of steel‐to‐timber connections with high fire resistance

Cited by 2 publications

References 12 publications

Experimental testing on timber connections considering the influence of gap size and intumescent sealants

Experimental testing on timber connections considering the influence of gap size and intumescent sealants

Performance of Timber-to-Steel Bolted Connections Exposed to Fire

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