Numerical Analysis of the Bending Properties of Cathay Poplar Glulam

Materials

Ying Gao²  Yuxuan Wu²  Xudong Zhu²  Lei Zhu¹  Zhiming Yu²  Yong Wu³ 

[1] Beijing University of Civil Engineering and Architecture, Beijing 100044, China;MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, Beijing 100083, China;Suzhou Grownhomes Co., Ltd., Suzhou 215105, China;

关键词: structural glued-laminated timber (glulam);    Chinese domestic Cathay poplar;    mechanical tests;    bending properties;    checking calculation;    formulae;    finite element analysis;   

DOI  :  10.3390/ma8105362

来源: mdpi

【 摘 要 】

This paper presents the formulae and finite element analysis models for predicting the Modulus of Elastic (MOE) and Modulus of Rupture (MOR) of Cathay poplar finger-jointed glulam. The formula of the MOE predicts the MOE of Cathay poplar glulam glued with one-component polyurethane precisely. Three formulae are used to predict the MOR, and Equation (12) predicts the MOR of Cathay poplar glulam precisely. The finite element analysis simulation results of both the MOE and MOR are similar to the experimental results. The predicted results of the finite element analysis are shown to be more accurate than those of the formulae, because the finite element analysis considers the glue layers, but the formulae do not. Three types of typical failure modes due to bending were summarized. The bending properties of Cathay poplar glulam were compared to those of Douglas fir glulam. The results show that Cathay poplar glulam has a lower stiffness, but a marginally higher strength. One-component polyurethane adhesive is shown to be more effective than resorcinol formaldehyde resin adhesive for Cathay poplar glulam. This study shows that Cathay poplar has the potential to be a glulam material in China.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.