Abstract:Current design and construction codes and standards for bamboo do not contain strength grading procedures beyond cursory visual inspections. This deficiency arguably limits the safe and economic use of the material. This paper presents findings from an international research project which seeks to develop a strength grading system for bamboo culms. Over 200 four-point bending tests were carried out on Guadua angustifolia Kunth (Guadua a.k.) culms for which numerous mechanical and physical properties were measured.Correlations between flexural strength (fm,0), static modulus of elasticity (Em,s), dynamic modulus of elasticity from stress-waves (Ed) and density (ρ), provided mediocre results with R 2 ranging from 0.27 to 0.47. However, properties such as flexural stiffness (EIm,s), flexural capacity (Mmax) and mass per unit length (q), which are less dependent on geometric properties, provided much stronger correlations with R 2 ranging from 0.86 to 0.92.
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