Compression resistance of short members as the basis for structural grading of Guadua angustifolia

Experimental study on buckling resistance of Guadua angustifolia bamboo column

“…Bamboo stems, or culms, are often used as columns or compression elements in trussed structures [1]. The diameter (D) of Guadua bamboo culm is relatively large (59 mm < D < 137 mm), while its wall thickness ( ) ranges from thin to thick (5 mm < < 23 mm), and its diameter to thickness ratio (D/ ) range is from 4.7 to 16.2 [2]. The cross-section of Guadua bamboo culm is similar to a hollow tube, which inherently has a high second moment of area (or moment of inertia, I).…”

“…Several studies on short bamboo culms subjected to axial compressive load have been conducted previously [2,8]. Compressive load acting on a long column is considered as an interaction between axial compression and bending, thus the resulting failure may be due to plasticity (crushing) or elasticity (buckling).…”

“…Simple linear regression A simple linear regression analysis was conducted on the data obtained from the test on short specimens. The data of compressive test of short specimens had been analyzed and discussed for structural grading in our previous paper [2]. The air dry density ( a) or air dry linear mass The linear regression results were used to estimate the ultimate compressive load ( ) or ultimate compressive stress ( ) of long members subjected to axial compression.…”

Mechanical Properties and Strength Grading of Engineered Bamboo Composites in China

“…where μ is the mean of the normal distribution; σ is the standard deviation of the normal distribution; K N is the confidence level factor of the normal distribution; μ In is the Advances in Civil Engineering mean of the lognormal distribution; σ In is the standard deviation of the lognormal distribution; K In is the confidence level factor of the lognormal distribution;X is the mean of the Weibull distribution; S is the standard deviation of the Weibull distribution; and K W is the confidence level factor of the Weibull distribution. e EBC strength grading was conducted using a confidence band approach as described by Bahtiar et al [16]. Statistical analysis was developed using correlation and linear regression.…”

“…For bamboo culm, Trujillo et al [13] indicated that grading could be utilized based on physical properties and flexural stiffness. Nurmadina et al [14] and Bahtiar [15,16] studied several potentials, including Mc, density, and linear mass, for bamboo culm both in flexural and compressive strength grading. e grading of timber and bamboo are constantly studied, but the strength grading of EBC subject to compressive properties is still missed.…”