木材科学与技术2023，Vol.37Issue(5)：53-60,8.DOI:10.12326/j.2096-9694.2023014
人工林杉木结构用集成材层板抗弯性能研究
Bending Performance of Structural Glued Laminated Timber Laminae from Chinese Fir Plantation
摘要
Abstract
In this paper,the laminae from Chinese fir plantation(Cunninghamia lanceolata)were studied.The effects of three types of finger length and four types of Chimerism on the bending properties of Chinese fir finger-joint laminae were analyzed.The bending properties of different grades of Chinese fir finger-joint and nonfinger-joint laminae were obtained.And the correlated mathematical equation of the bending properties were established.The results showed that finger length and chimeric degree had a great influence on the bending properties of finger-joint laminae.Under the experimental conditions,the optimal process for the finger-joint laminae from plantation Chinese Fir were:finger length 15 mm,width to distance ratio 0.18,chimeric degree 0.1 mm.Grading had a great influence on the bending properties of finger-joint and nonfinger-joint laminae.The characteristic values of bending strength of grade Ⅰ and grade Ⅱ finger-joint laminae were 28.7 MPa and 26.6 MPa,respectively.They were 17.14％and 8.57％higher than those of nongraded Chinese fir finger-joint laminae,respectively.The dynamic elastic modulus and static elastic modulus based on the stress wave method,static elastic modulus,and bending strength of Chinese fir laminae were significantly positive correlated.The correlation coefficient was 0.838 and 0.691,respectively.关键词
杉木/结构用集成材/层板/指接工艺/机械分等/抗弯性能Key words
Chinese fir/structural glued laminated timber/laminae/finger-joint process/machine grading/bending properties分类
农业科技引用本文复制引用
陈旭,王玉荣,龚迎春,任海青,赵磊..人工林杉木结构用集成材层板抗弯性能研究[J].木材科学与技术,2023,37(5):53-60,8.基金项目
浙江省省院合作林业科技项目"高强度人工林杉木工程木产品制造关键技术"(2021SY09) （2021SY09）
"十四五"国家重点研发计划课题"结构用大规格集成材的制造与评价关键技术"(2021YFD2200605) （2021YFD2200605）
山东省科技型中小企业创新能力提升工程项目"结构用木质复合新型材料制造与应用关键技术"(2023TSGC0821). （2023TSGC0821）
