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Lesnoy Zhurnal

Numerical Simulation of LVL Elastic Modulus with Different Combinations of Mutually Perpendicular Veneer Layers

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E.Yu. Tsiulin, A.B. Shmidt

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UDС

691.116

DOI:

10.17238/issn0536-1036.2018.6.138

Abstract

Integrated composed supporting structures such as laminated plywood are the most sustainable in terms of material consumption in comparison with ordinary glulam structures of the same supporting capacity. However, design features and some manufacturing difficulties reduce the economic efficiency of laminated plywood structures. Appearance of Laminated Veneer Lumber (LVL) and possibility of using its various types instead of plywood walls and board belts can significantly increase the efficiency and expand the application area of composite structures of composed I-beam or box section. An important problem that limits development and common use of composed structures with LVL is the lack of information on value of the elastic modulus under different angles to wood fibers in LVL in current Russian design standards. This information is necessary for structure designing, for example, according to the method of transformed section. The article describes the creation of finite element models as well as the results of a finite element analysis of anisotropy of Ultralam LVL elastic modulus with different amount and combination of layers and mutually perpendicular and parallel arrangement of wood fibers. In the research, we have used numerical simulation of LVL bending tests using the FEM method according to GOST 33124–2014 in the SCAD program. The obtained data was processed in Mathcad and Excel software packages. Simple analytical dependences were obtained. They allow to calculate the elastic modulus of all types and thicknesses of Ultralam LVL at any given angle to wood fibers.

Authors

E.Yu. Tsiulin, Postgraduate Student
A.B. Shmidt, Candidate of Engineering Sciences, Associate Professor

Affiliation

Saint-Petersburg State University of Architecture and Civil Engineering, 2-ya Krasnoarmeyskaya ul., 4, Saint Petersburg, 190005, Russian Federation; е-mail: eciulin@edu.spbgasu.rushmidt.a.b@lan.spbgasu.ru

Keywords

Ultralam LVL, elastic modulus, finite element method, numerical experiment, wood structures, laminated veneer lumber, laminated wood structures

For citation

Tsiulin E.Yu., Shmidt A.B. Numerical Simulation of LVL Elastic Modulus with Different Combinations of Mutually Perpendicular Veneer Layers. Lesnoy Zhurnal [Forestry Journal], 2018, no. 6, pp. 138–148. DOI: 10.17238/issn0536-1036.2018.6.138

References

1. Ashkenazi E.K. Anizotropiya drevesiny i drevesnykh materialov [Anisotropy of Wood and Wood Materials]. Moscow, Lesnaya promyshlennost’ Publ., 1978. 218 p. (In Russ.)
2. GOST 33124–2014. Brus mnogosloynyy kleyenyy iz shpona. Tekhnicheskiye usloviya [Laminated Veneer Lumber. Technic Specifications]. Moscow, Standartinform Publ., 2015.
3. Posobiye po proyektirovaniyu derevyannykh konstruktsiy (k SNiP II-25–80) [Manual on Wooden Structures Design (for SNiP II-25-80]. TSNIISK. Moscow, Stroyizdat Publ., 1986. 216 p.
4. Serov E.N., Sannikov Yu.D., Serov A.E. Proyektirovaniye derevyannykh konstruktsiy: ucheb. posobiye [Design of Wooden Structures: Educational Textbook]. Ed. by E.N. Serov. Moscow, ASV Publ., 2011. 536 p. (In Russ.)
5. SP 64.13330.2017. Derevyannyye konstruktsii. Akt. versiya SNiP II-25–80 [SP 64.13330.2017. Wooden Structures. Valid Version of SNiP II-25–80]. Moscow, 2017.
6. STO 36554501-021–2010. Derevyannyye konstruktsii. Mnogosloynyy kleyenyy iz shpona material «Ultralam» (Ul’tralam) [STO 36554501-021-2010. Wooden Structures. Multilayer Glued Veneer Material Ultralam]. Moscow, NITS Stroitel’stvo Publ., 2010.
7. Shmidt A.B. Chislennyy analiz raboty kleyefanernykh konstruktsiy s defektami izgotovleniya [Numerical Analysis of Glulam Plywood Structures Behavior Containing Manufacture Defects]. Vestnik grazhdanskikh inzhenerov [Bulletin of Civil Engineers], 2011, no. 4(29), pp. 41–46.
8. Shmidt A.B., Dmitriyev P.A. Atlas stroitel’nykh konstruktsiy iz kleyenoy drevesiny i vodostoykoy fanery: ucheb. posobiye [Atlas of Building Structures from Laminated Wood and Water Resistant Plywood: Educational Textbook]. Moscow, ASV Publ., 2002. 285 p. (In Russ.)
9. DIN EN 14374:2004. Timber Structures – Structural Laminated Veneer Lumber – Requirements. 2005. 22 p.
10. DIN EN 408:2004. Timber Structures – Structural Timber and Glued Laminated Timber – Determination of Some Physical and Mechanical Properties. 2004. 30 p.
11. EN 1995-1-1:2004+A1. Eurocode 5: Design of Timber Structures – Part 1–11: General – Common Rules and Rules for Buildings. 2008. 121 p.
12. Jäger A., Bader T., Hofstetter K., Eberhardsteiner J. The Relation between Indentation Modulus, Microfibril Angle, and Elastic Properties of Wood Cell Walls. Composites Part A: Applied Science and Manufacturing, 2011, vol. 42, iss. 6, pp. 677–685. DOI: 10.1016/j.compositesa.2011.02.007
13. Kamala B.S., Kumar P., Rao R.V., Sharma S.N. Performance Test of Laminated Veneer Lumber (LVL) from Rubber Wood for Different Physical and Mechanical Properties. Holz als Roh- und Werkstoff, 1999, vol. 57, iss. 2, pp. 114–116. DOI: 10.1007/s001070050025
14. Meder R., Thumm A., Bier H. Veneer Stiffness Predicted by NIR Spectroscopy Calibrated Using Mini-LVL Test Panels. Holz als Roh- und Werkstoff, 2002, vol. 60, iss. 3, pp. 159–164. DOI: 10.1007/s00107-002-0296-y
15. Structural Plywood & LVL Design Manual. Ed. by J. MacGregor, Australia, Engineered Wood Product Association of Australia, 2009. 261 p.

Received on May 28, 2018


Numerical Simulation of LVL Elastic Modulus with Different Combinations of Mutually Perpendicular Veneer Layers

 

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