Dergiler / Black Sea Journal of Engineering and Science / 2026 / Cilt: 8 Sayı: 1

Effects of Loading Type and Loading Rate on Glulam Sipo Timber Beams for Flexural Loading

Minel Ahu Kara Alaşalvar(GAZİ ÜNİVERSİTESİ, FEN BİLİMLERİ ENSTİTÜSÜ)0000-0003-1138-1446
Sayfa
1–10
Yayın Tarihi
2025-01-15
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⚡ TL;DR(1 Cümlede Hızlı Çıkarım)

Notably, a significant reduction in values was observed for both testing methods at the loading rate of 20 mm/min.

📌 3 Maddede Bu Makale

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Amaç & Hipotez:Glulam wood elements are a high-performance structural material created by bonding layers of wood with structural adhesives.
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Temel Bulgular & Veri:This study investigates the behavior of glulam beams made from the tropical timber species Sipo, which has limited representation in existing literature, under different loading types and rates in bending tests.
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Sonuç & Katkı:Notably, a significant reduction in values was observed for both testing methods at the loading rate of 20 mm/min.
🔬Tür:Araştırma Makalesi
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Glulam · Bending tests · Strength

Özet

Glulam wood elements are a high-performance structural material created by bonding layers of wood with structural adhesives. This study investigates the behavior of glulam beams made from the tropical timber species Sipo, which has limited representation in existing literature, under different loading types and rates in bending tests. Six Sipo glulam beams were tested: three under four-point bending and three under three-point bending. To assess the behavior at various loading rates, loads were applied at rates of 10 mm/min, 20 mm/min, and 30 mm/min. The results included load-displacement curves, ultimate load capacities, initial stiffness, and energy dissipation capacities. The study revealed differences between values obtained from three-point and four-point bending tests. Generally, beams subjected to three-point bending yielded higher values than those tested under four-point bending at the same loading rates. Notably, a significant reduction in values was observed for both testing methods at the loading rate of 20 mm/min.

Abstract

Glulam wood elements are a high-performance structural material created by bonding layers of wood with structural adhesives. This study investigates the behavior of glulam beams made from the tropical timber species Sipo, which has limited representation in existing literature, under different loading types and rates in bending tests. Six Sipo glulam beams were tested: three under four-point bending and three under three-point bending. To assess the behavior at various loading rates, loads were applied at rates of 10 mm/min, 20 mm/min, and 30 mm/min. The results included load-displacement curves, ultimate load capacities, initial stiffness, and energy dissipation capacities. The study revealed differences between values obtained from three-point and four-point bending tests. Generally, beams subjected to three-point bending yielded higher values than those tested under four-point bending at the same loading rates. Notably, a significant reduction in values was observed for both testing methods at the loading rate of 20 mm/min.

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Bu Makaleye Atıf Yap

Alaşalvar, M. A. K. (2025). Effects of Loading Type and Loading Rate on Glulam Sipo Timber Beams for Flexural Loading. Black Sea Journal of Engineering and Science, Cilt: 8 Sayı: 1, 1–10. https://doi.org/10.34248/bsengineering.1557319

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Kaynakça (24)

  1. Babiak M, Gaff M, Sikora A, Hysek Š. 2018. Modulus of elasticity in three-and four-point bending of wood. Compos Struct, 204: 454-465.
  2. Brancheriau L, Bailleres H, Guitard D. 2002. Comparison between modulus of elasticity values calculated using 3 and 4 point bending tests on wooden samples. Wood Sci Technol, 36(5): 367-383.
  3. Büyüksari Ü. 2017. Effect of loading rate on mechanical properties of micro-sized oak wood. Maderas, 19(2): 163-172.
  4. Das AK, Islam MN, Ghosh CK, Ghosh RK. 2023. Physical and mechanical properties of Albizia procera glulam beam. Heliyon, 9(8).
  5. Gérard J, Guibal D, Paradis S, Cerre JC. 2017. Tropical timber atlas: technological characteristics and uses. Éditions Quæ. RD 10 78026 Versailles Cedex, Paris, France, pp: 834-836
  6. Gerhards CC. 1977. Effect of duration and rate of loading on strength of wood and wood-based materials, USDA Forest Service Research Paper, U.S. Department of Agriculture Forest Service Forest Products Laboratory Madison, Wis, USA, pp: 1-24.
  7. Ghoroubi R, Mercimek Ö, Sakin S, Anil Ö. 2022. Experimental investigation of bonding behavior of anchoraged timber-to-timber joint. Arch Civ Mech Eng, 22: 1-16.
  8. He M, Wang Y, Li Z, Zhou L, Tong Y, Sun X. 2022. An experimental and analytical study on the bending performance of CFRP-reinforced glulam beams. Front Mater, 8: 802249.
  9. Hein PRG, Brancheriau L. 2018. Comparison between three-point and four-point flexural tests to determine wood strength of Eucalyptus specimens. Maderas, 20(3): 333-342.
  10. Issa CA, Kmeid Z. 2005. Advanced wood engineering: glulam beams. Constr Build Mater, 19(2): 99-106.
  11. İşleyen ÜK, Ghoroubi R, Mercimek Ö, Anıl Ö, Erdem RT. 2023. Investigation of impact behavior of glulam beam strengthened with CFRP. Struct, 51: 196-214.
  12. İşleyen ÜK, Ghoroubi R, Mercimek Ö, Anil Ö, Erdem RT. 2021. Behavior of glulam timber beam strengthened with carbon fiber reinforced polymer strip for flexural loading. J Reinf Plast Compos, 40(17-18): 665-685.
  13. İşleyen ÜK, Ghoroubi R, Mercimek Ö, Anıl Ö, Togay A, Erdem RT. 2021. Effect of anchorage number and CFRP strips length on behavior of strengthened glulam timber beam for flexural loading. Adv Struct Eng, 24(9): 1869-1882.
  14. Li H, Ren Y, Zuo T, Xu X, Wang Y, Tian P. 2024. Experimental study of flexural behavior of glulam Douglas Fir beams spliced with engineered bamboo cover plates and inclined self-tapping screws. Struct, 65: 106658.
  15. Mei L, Ren J, Lin X, Wu M, Guo N, Yang W, Sheng Y. 2024. Analytical model for prestressed glulam beams reinforced with unbonded steel bars. Eng Struct, 307: 117862.
  16. Mercimek Ö, Ghoroubi R, Akkaya ST, Türer A, Anıl Ö, İşleyen, ÜK. 2024. Flexural behavior of finger joint connected glulam wooden beams strengthened with CFRP strips. Struct 66: 106853.
  17. Stark NM, Cai Z, Carll C. 2010. Wood-based composite materials panel products, glued-laminated timber, structural composite lumber, and wood–nonwood composite materials. In: Ross RJ, editor. Wood handbook: wood as an engineering material. Forest Products Laboratory, United States Department of Agriculture Forest Service Madison, Wisconsin, USA, pp: (11-1)-(11-26).
  18. Uzel M, Togay A, Anil Ö, Söğütlü C. 2018. Experimental investigation of flexural behavior of glulam beams reinforced with different bonding surface materials. Constr. Build Mater, 158: 149-163.
  19. Wang Y, He M, Li Z. 2024. Flexural behavior of glulam beams reinforced by bonded prestressing tendons. Eng Struct, 315:118436.
  20. Wang T, Wang Y, Ringaby J, Crocetti R, Wålinder M, Blomqvist L. 2024. Glulam beams adhesively bonded by birch plywood plates in moment-resisting beam-to-beam connections. Eng Struct, 302:117471.
  21. Yang H, Liu W, Lu W, Zhu S, Geng Q. 2016. Flexural behavior of FRP and steel reinforced glulam beams: Experimental and theoretical evaluation. Constr Build Mater, 106: 550-563.
  22. Yoshihara H. 2013. Comparison of results obtained by static 3-and 4-point bending and flexural vibration tests on solid wood, MDF, and 5-plywood. HF, 67(8): 941-948.
  23. Zhao J, Liu H, Chen Z, Zhao S, Yang S, He F. 2023. Investigation on the mechanical behavior of glulam beam string. Struct, 52: 582-597.
  24. Zhang X, Zhang Y, Xie X. 2023. Experimental and analytical investigation of the flexural behaviour of stiffened hollow glulam beams reinforced with fibre reinforced polymer. Struct, 50: 810-822.