MENGIDEALISASIKAN PENAMPANG LINTANG BULUH BAMBU MENJADI BENTUK GEOMETRI CONIC UNTUK MENGHITUNG SIFAT PENAMPANGNYA
Main Article Content
Abstract
A designer needs to simplify the bamboo cross-section shape variation to the closest standard geometry so a structural analysis
of bamboo construction can be carried out. Bamboo culm’s cross-sectional geometrics vary and may be similar to conic such as a
circle, ellipse, or egg-shape ring. The best-fit conic section, which is the most similar to the actual geometric shape of the bamboo
culm’s cross-section, should be considered. This study formulates mathematical equations for calculating the bamboo culm’s crosssectional properties (including the area, the first moment of area, the centroid, and the moment of inertia), which are fitted by a
circle, ellipse, and egg-shaped ring. The thickness, diameter, major axis, and minor axis of four bamboo species (i.e., Gigantochloa
apus, Bambusa vulgaris, Gigantochloa pseudoarundinacea, and Gigantochloa robusta) were measured, and those
values were substituted into the equations to produce the range of cross-sectional properties of each species.
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