Flexural Performance of Built-Up Beams Made with Plantation Wood
AbstractIn this study, Japanese cedar (Cryptomeria japonica (L. f.) D. Don) harvested from a plantation in Taiwan was used to develop built-up beams using self-tapping screws as metal connectors and resorcinol formaldehyde resin as glue to assemble components based on various assembly configurations. Results showed that adding glue provided flexural rigidity, whereas assembly using self-tapping screws resulted in built-up beams with high ductility but relatively low flexural bearing capacity. Beams used glue exhibited approximately linear behavior, whereas those using only screws exhibited some undulating and stepwise responses, implying that shear force between the flanges and the web may cause buckling as well as the dislocation of the self-tapping screws. When using components of similar grades, adding another web can improve the performance. Furthermore, the grades of flanges can strongly influence the flexural load-bearing capacity. In addition, a smaller spacing between the screws can improve the flexural load-bearing performance, but also cause wooden components to crack. Typical bending failure modes were observed in the developed built-up beams, indicating tension failure of the bottom flange as well as slippage between flanges and the web due to horizontal shear, which also caused buckling deformations in the screws. View Full-Text
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Chien, T.-P.; Yang, T.-H.; Chang, F.-C. Flexural Performance of Built-Up Beams Made with Plantation Wood. Forests 2019, 10, 647.
Chien T-P, Yang T-H, Chang F-C. Flexural Performance of Built-Up Beams Made with Plantation Wood. Forests. 2019; 10(8):647.Chicago/Turabian Style
Chien, Tsai-Po; Yang, Te-Hsin; Chang, Feng-Cheng. 2019. "Flexural Performance of Built-Up Beams Made with Plantation Wood." Forests 10, no. 8: 647.
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