FIRE BEHAVIOUR OF PROTECTED W-S-W CONNECTIONS WITH A STEEL PLATE AS THE CENTRAL MEMBER AND DIFFERENT DOWELS DIAMETER
DOI:
https://doi.org/10.20319/mijst.2018.43.6078Keywords:
W-S-W Connection, Wood, Steel, Gypsum, Dowel, Char Layer, High TemperatureAbstract
The main objective of this work is to present wood-steel-wood (W-S-W) connections in double-shear, joined by steel dowel fasteners and a steel plate as the central member. For each studied connection, different dowel diameters and external applied tensile loads in fire situation shall be taken in account. Considering the rules presented in Eurocode 5, part 1-1 and 1-2, the calculated number of dowels will be arranged in lines and columns and carry out an imposed spacing between the connectors. This work is intended to study the W-S-W connection exposed to fire using the standard curve ISO834. In the wood plates will be used a glue laminated wood, as yellow birch, with characteristics equals to GL28H. For protected connections three types of gypsum will be used in order to obtain a better insulation. Simplified equations from Eurocode 5, part 1-1 and 1-2, will be used to verify the behaviour of the connections at high temperature. A numerical procedure based on finite element method was also implemented to produce simulations focused on thermal analysis. The comparison of several results between analytical and numerical calculations showed a favourable accordance. The numerical model permits verify the effect of the steel dowels, steel plate and gypsum in the wood charring rate evolution. Even though the connection can resist for thirty minutes, is possible to observe the char layer both on protected and unprotected connection being the last the most affected.
References
Abderrahim Aissa, Elza M M Fonseca, Belkacem Lamri (2017). Computational model for W-W-W connections at ambient and high temperatures. Book of Abstracts of the 2nd Symposium on Mechanical Engineering, DCE17 | 2nd Doctoral Congress of Engineering, Editors: J César de Sá et al, FEUP, ISBN: 978-972-752-224-8, 45-46.
Aissa, A., Fonseca, E.M.M., Lamri, B. (2017). Protected and Unprotected W-W-W Connection at Elevated Temperatures. Research and Advanced Technology in Fire Safety, Daniel Alvear (ed.), Ed. Universidad Cantabria, D.L. SA 739-2017, ISBN: 978-84-8102-832-4, 407.
Akotuah, A. O., Ali, S. G., Erochko, J., Zhang, X., & Hadjisophocleous, G. V. (2015). Study of the Fire Performance of Hybrid Steel-Timber Connections with Full-Scale Tests and Finite Element Modelling. Applications of Structural Fire Engineering, 251-256.
Alves, M. C., & Batista, E. D. M. (2007). Computational analysis of the heat transfer through cold-formed steel frame panel under fire condition. Engenharia Civil: Estrutura Em Aço, 60 (2), 303-313.
CEN, EN1991-1-2 - Eurocode 1: Actions on Structures, Part 1-2: General actions - Actions on Structures Exposed to Fire, Brussels, 2002.
CEN, EN1995-1-1: Eurocode 5: Design of timber structures. Part 1-1: General Common rules and rules for buildings, Brussels, 2004.
CEN, EN1995-1-2: Eurocode 5: Design of timber structures. Part 1-2: General Structural fire design, Brussels, 2004.
DIN 6325, EN ISO 8734: Parallel Pins, of Hardened Steel and Martensitic Stainless Steel (Dowel Pins) Cylindrical Pins, December 1997. ICS: 21.060.50.
Eckart Resch, Michael Kaliske (2012). Numerical analysis and design of double-shear dowel-type connections of wood. Engineering Structures, 41, 234-241. https://doi.org/10.1016/j.engstruct.2012.03.047
L. Peng, G. Hadjisophocleous, J. Mehaffey, M. Mohammad (2011). On the Fire Performance of Double-shear Timber Connections. Fire Safety Science, 42, 1207-1218. https://doi.org/10.3801/IAFFS.FSS.10-1207
Fernandes, Maria G., Fonseca, Elza E. M. M., Teixeira, Tiago A. S., Jorge, Renato N. (2017). Dynamic Numerical Simulation of Different Drill Bit Diameter on the Polyurethane Foams Drilling. MATTER: International Journal of Science and Technology, 3(3), 01-12. https://doi.org/10.20319/mijst.2017.32.112
Moraes, P. D. De, & Figueroa, M. J. M. (2009). Comportamento da madeira a temperaturas elevadas. Ambiente Construído, 9 (4), 157–174.
Pang. Yicun. (2018). The Pursuit of New Chinese Timber Structure Architecture Technology. MATTER: International Journal of Science and Technology, 4(2), 220-237. https://doi.org/10.20319/mijst.2018.42.220237
Piloto, Paulo A. G., Khetata, Mohamed S., Gavilán, Ana B. R. (2017). Fire Performance of Non-Loadbearing Light Steel Framing Walls - Numerical and Simple Calculation Methods. MATTER: International Journal of Science and Technology, 3(3), 13-23. https://doi.org/10.20319/mijst.2017.32.1323
Sultan, M. A. (1996). A model for predicting heat transfer through non insulated unloaded steel-stud gypsum board wall assemblies exposed to fire. Fire Technology, 32 (3), 239–259. https://doi.org/10.1007/BF01040217
Downloads
Published
How to Cite
Issue
Section
License
Copyright of Published Articles
Author(s) retain the article copyright and publishing rights without any restrictions.
All published work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
