Experimental study on flexural performance of glued-laminated-timber-bamboo beams
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Engineered bamboo, produced through the technique of gluing and reconstituting, has better mechanical properties than round bamboo and some wood products. This paper studies the flexural performance of laminated beams produced with timber and engineered bamboo. The six-layer beams were made from Douglas fir, spruce, bamboo scrimber and laminated bamboo, or a combination of these. It is confirmed that glued-laminated wood beams produced with wood of weak strength, like spruce, can be strengthened by gluing engineered bamboo lumbers on the outer faces, thus achieving better utilization of the fast growing economic wood species. Flexural failure of the laminated beams was primarily triggered by tensile fracture of the bottom fiber in mid-span, followed by horizontal tearing beside the broken surface. No relative slip between layers was observed before failure, therefore the flexural capacity of the laminated beams can be predicted using equilibrium and compatibility conditions according to the plane section assumption.
KeywordsEngineered bamboo Bamboo scrimber Timber Laminated beams Flexural performance
The authors gratefully acknowledge the financial support from the National Key R&D Program of China (Grant No. 2017YFC0703503), and R&D Project of Ministry of Housing and Urban–Rural Development of People’s Republic of China (Grant No. 2016-K5-017).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- 4.Falk RH (2009) Wood as a sustainable building material. For Prod J 59(9):6–12Google Scholar
- 11.Moody RC (1974) Design criteria for large structural glued-laminated timber beams using mixed species of visually graded lumber. Forest Products Laboratory, U.S. Department of Agriculture, Forest Service, Madison, WisconsinGoogle Scholar
- 14.American Wood Council (2015) ASD/LRFD Manual for engineered wood construction. Leesburg VA, USAGoogle Scholar
- 15.BS EN 14080 (2013) Timber structures—glued laminated timber and glued solid timber—requirements. British Standards International (BSI), UKGoogle Scholar
- 26.ASTM D198-15 (2015) Standard test methods of static tests of lumber in structural sizes. American society for testing and materials (ASTM), West Conshohocken, USAGoogle Scholar
- 27.ISO 22157-1 (2004) Bamboo—determination of physical and mechanical properties—part 1: requirements. International Standards Organisation (ISO), Geneva, SwitzerlandGoogle Scholar
- 28.JG/T 199-2007 (2007) Testing method for physical and mechanical properties of bamboo used in building. Ministry of Housing and Urban-Rural Development of the People’s Republic of China (MOHURD), Beijing, China (in Chinese) Google Scholar
- 29.ISO 22156: 2004 (2012) Bamboo—structural design. International Standards Organisation (ISO), Geneva, SwitzerlandGoogle Scholar
- 30.ASTM D143-14 (2014) Standard test methods for small clear specimens of timber. American society for testing and materials (ASTM), West Conshohocken, USAGoogle Scholar
- 31.Eurocode 5 (2003) Design of timber structures—part 1-1: general rules and rules for buildings (EN 1995-1-1:2004+A2:2014). European Committee for Standardization, Brussels, BelgiumGoogle Scholar
- 32.Long WG, Yang XB, Wang YW (2005) Design manual for timber structures, 3rd edn. China Architecture and Building Press, Beijing (in Chinese) Google Scholar