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Performance assessment of bending and shear stiffness of hybrid Beech-Poplar cross-laminated timber (CLT) using experimental and finite element methods | ||
| تحقیقات علوم چوب و کاغذ ایران | ||
| Article 2, Volume 37, Issue 2 - Serial Number 79, May 2022, Pages 99-112 PDF (1.1 M) | ||
| Document Type: Research Paper | ||
| DOI: 10.22092/ijwpr.2022.357133.1705 | ||
| Authors | ||
| Hojat Hematabadi* 1; Mehrab Madhoushi2; Abolghasem Khazaeian3; Ghanbar Ebrahimi4 | ||
| 1PhD student,, Department of Wood Engineering and Technology, Gorgan University of Agricultural Sciences and Natural Resources,, Gorgan, Iran | ||
| 2Associate Professor, Department of Wood Engineering and Technology, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran | ||
| 3Associate Professor, Department of Wood Engineering and Technology, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran | ||
| 4Professor, Faculty of Natural Resources, University of Tehran, Karaj, Iran | ||
| Abstract | ||
| This study investigated the bending and shear strength of hybrid cross-laminated timber (CLT) manufactured from beech (Fagus orientalis) and poplar (Populus deltoides) wood using experimental and finite element methods. The CLT panels were manufactured at various span to depth ratios 6, 10, 15, 20 and 25 with width of 30 cm and thickness of 2 cm in both major and minor directions. Then, the bending and shear strength of CLTs were measured using three-point bending test according to ASTM test methods. The results indicated that with the increase of span to depth ratio of the beam from 6 to 25, the averages modulus of elasticity (MOE) and modulus of rupture (MOR) values were increased in both major and minor directions. On the contrary, the averages shear modulus ( ) values of specimens in both directions were decreased. Moreover, the results of finite elements showed that the amounts of stress distributions and their locations were different in major and minor directions of the beam. In the major direction, the surface layers were primarily contributed load-carrying capacity of CLT panels, while in the minor direction the middle layer played the most significant role for load-carrying capacity. In this research, it was resulted that specimens with span to depth ratio greater than 15 based on ASTM D198 can be used for calculating MOE and MOR of CLT panels. Furthermore, due to existence of lower difference than 10% between experimental and numerical results, modules of elasticity of CLTs were predictable according to finite element method | ||
| Keywords | ||
| Cross laminated timber; Beech; Poplar; Bending and shear strength; Finite element method | ||
| References | ||
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-Bodig, J. and Jayne, B.A., 1993. Mechanics of wood and wood composites, Malabar, Krieger Publishing Company, 736 p.
-Gagnon, S. and Popovski, M., 2013. Structural design of cross-laminated timber elements. CLT Handbook (FP Innovations), 1st Ed., Pointe-Claire, Quebec, 812 p.
-He, M., Sun, X. and Li, Z., 2018. Bending and compressive properties of cross-laminated timber (CLT) panels made from Canadian hemlock, Construction and Building Materials 185:175-183.
-Kramer, A., Barbosa, A.R. and Sinha, A., 2013. Viability of hybrid poplar in ANSI approved cross laminated timber applications. Journal of Materials in Civil Engineering, 26: 7. 1–5.
-Liao, Y., Tu, D., Zhou, J., Zhou, H., Yun, H., Gu, J. and Hu, Ch., 2017. Feasibility of manufacturing cross-laminated timber using fast-grown small diameter eucalyptus lumbers. Construction and Building Materials, 132: 1. 508–515.
-Madhoushi, M., 2017. Green building biomaterials, 1st Ed., Jahad Daneshgahi Press, 218 p. (In Persian).
-Navaratnam, S., Christopher, P., Ngo, T. and Le, T., 2020. Bending and shear performance of Australian Radiata pine cross-laminated timber. Construction and Building Materials, 232: 117215.
-Robertson, A.B., 2011. A comparative life cycle assessment of mid-rise office building construction alternatives: laminated timber or reinforced concrete. Buildings, 2: 245-270.
-Rostampour Haftkhani, A., layeghi. M., Ebrahimi, G. and Pourtahmasbi, K., 2017. Evaluation of bending performance for cross laminated timber (CLT) made out of poplar (Populus alba). Iranian Journal of Wood and Paper Industries, 8: 1. 67-78.
-Standards for performance-rated cross-laminated timber. American National Standard. ANSI/APA PRG 320, 29p, 2019.
-Standard test methods of static testing of lumber in structural sizes. ASTM International West Conshohocken, Pennsylvania. 27p, ASTM D198, 2014.
-Wang, Z., Fu, H., Chui, Y.H. and Gong, M., 2014. Feasibility of using poplar as cross layer to fabricate cross-laminated timber. World Conference on Timber Engineering, Shear Test, American Institute of Timber Construction. Standard AITC test T107. 10-14. http://schd.ws/hosted_files/wcte2014/cb/ABS520_Gong_web.pdf.
-Zahedi, M., Kazemi Najafi, S., Füssl, J. and Elyasi, M., 2021. Determining elastic constants of poplar wood (Populus deltoides) by ultrasonic waves and its application in the finite element analysis. Wood Material Science and Engineering, 1925-1962. | ||
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