Study on shear performance of notched connections for glulam-concrete composite beams under fire

Shi, Danrong; Hu, Xiamin; Du, Hao; Xie, Zhinan; Meng, Yanfei

doi:10.1016/j.firesaf.2021.103482

Cited by 9 publications

(14 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…• On average, the charring rates specified in the NDS and Eurocode F I G U R E 7 Char depths of solid softwood and glulam taken from the literature. 19,21,23,25,43,[46][47][48][49] CLT specimen with 10 mm-thick laminations exposed for up to 71 min.…”

Section: Discussionmentioning

confidence: 99%

Review of the charring rates of different timber species

Liu

Fischer

2023

Fire and Materials

View full text Add to dashboard Cite

During a fire, the load‐carrying cross section of timber members will reduce due to charring. This article summarizes experimental investigations into the charring rate of different timber species under standard fire conditions, identifies material properties that contribute to the variations of char rates across the different species, and evaluates the applicability of prescribed charring rates to solid timber, cross‐laminated timber (CLT), and glulam exposed to standard fires. Data from the literature showed that density had the greatest impact on charring rate. The charring rate of timber decreased with increasing density, particularly timber densities >700 kg/m3. Prescribed charring rates from current design standards provide reasonable estimates of the average charring rate of timber with densities <700 kg/m3 exposed to standard fire curves. A linear charring rate of 0.65 mm/min was found to be suitable for CLT and glulam exposed to a standard fire for up to 180 min if the CLT did not experience char fall‐off. The National Design Specification nonlinear charring model may underestimate the char depth of glulam exposed to standard fire curves for longer than 60 min; however, the percent underestimation was small and limited data was available. The review demonstrated the need for data on the char depths of glulam and CLT exposed to standard fire curves for longer than 60 min and particularly for longer than 120 min.

show abstract

Section: Discussionmentioning

confidence: 99%

Review of the charring rates of different timber species

Liu

Fischer

2023

Fire and Materials

View full text Add to dashboard Cite

show abstract

“…The notched connections discussed in this article are rectangular or trapezoidal wood notches that are filled with concrete and reinforced or unreinforced with steel fasteners in the center of the notch. There have been only a few studies on notched and grooved connections of TCC structures under fire in the existing literatures (Frangi and Fontana 2000;O'Neill et al 2009O'Neill et al , 2011Klingsch et al 2015;Shi et al 2021).…”

Section: Notched and Grooved Connectionsmentioning

confidence: 99%

“…The separation phenomenon occurred in the wood beam during the tests, which accelerated the charring inside the beam. Shi et al (2021) conducted push-out tests under fire on 10 glulam-concrete composite specimens. The specimen consisted of glulam beams with a width of 150 mm and a height of 300 mm, a concrete layer with a thickness of 80 mm, and a wood board with a thickness of 15 mm.…”

Section: Reinforced Notched and Grooved Connectionsmentioning

confidence: 99%

“…Based on the fire test results (Shi et al 2021), calculation formulas of the shear capacity for notched connection with screw reinforcement and concrete infill were established by Shi et al (2021). The temperature fields of timber near the notch were divided into finite rectangular elements i of parallel and constant width, which had different compressive strength (Fig.…”

Section: Notched and Grooved Connectionsmentioning

confidence: 99%

“…The timber-concrete composite (TCC) structure utilizes the advantages of the materials, namely the good tensile property of parallel grain wood and the strong compression ability of concrete. Compared with traditional wood structures, TCC structures have higher stiffness and strength, improved sound insulation (Martins et al 2015;Zhang et al 2020), better vibration behaviour (Mertens et al 2007;Xie et al 2020), and more effective fire resistance (Frangi 2001;Du et al 2021;Shi et al 2021). Compared with modern reinforced concrete structures, replacing the easily cracked concrete beams with wood beams not only can effectively utilize the advantages of materials, but it also can reduce the weight of the structure.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Review of connections for timber-concrete composite structures under fire

Shi

Hong

et al. 2022

BioRes

Self Cite

View full text Add to dashboard Cite

A timber-concrete composite structure has the advantages of energy saving, environmental protection, and low carbon, and has wide application prospects. However, the effects of fire on timber-concrete composite structures are complicated. It is important to study the fire performance of connections and their influencing factors for the promotion and application of timber-concrete composite structures. This paper summarizes the research progress of connections for timber-concrete composite structures under fire. Firstly, research on the performance of connections in timber-concrete composite structures under fire is introduced, including screwed connections, notched, and grooved connections, and steel truss plate connections. Secondly, the calculation methods focused on connections of timber-concrete composite structures under fire are introduced. Finally, the main points of modeling timber-concrete composite structures under fire are also briefly introduced.

show abstract

Study on Fire Resistance of Prefabricated Demountable Composite Beams Using Bolted Shear Connectors

Wang,

Lou,

Wen

et al. 2024

Fire Technol

View full text Add to dashboard Cite

Using bolts as shear connectors of the steel-concrete composite beams enables prefabricated assembly and makes it possible to demountable and reuse the prefabricated components. However, studies on the fire resistance of prefabricated demountable composite beams (PDCBs) connected by bolts are limited. In this paper, four full-scale fire resistance tests were conducted to investigate the fire resistance of PDCBs connected by shear bolts with profiled sheet ribs parallel to the steel beam. Test phenomena, heating curves, deformation curves, and critical temperatures of specimens were obtained through fire-resistant tests. Test results show that the shear failure of bolted connectors occurred in the partially connected PDCBs instead of in the fully connected ones. Under the same load ratio, the fire resistance limit of PDCBs with fire protection was 4.4 times that of PDCBs without fire protection. The temperatures of the upper flanges of the steel beams in the PDCBs were overestimated by the existing codes. Moreover, numerical heat transfer analysis was carried out to investigate the effect of steel beam upper flange dimensions and concrete slab thickness on the temperature distribution of the steel beam upper flange. Finally, formulas were proposed for calculating the temperature distribution of the steel beam upper flange, which agrees well with the FEM simulated values.

show abstract

Study on shear performance of notched connections for glulam-concrete composite beams under fire

Cited by 9 publications

References 19 publications

Review of the charring rates of different timber species

Review of the charring rates of different timber species

Review of connections for timber-concrete composite structures under fire

Study on Fire Resistance of Prefabricated Demountable Composite Beams Using Bolted Shear Connectors

Contact Info

Product

Resources

About