摘要
以木构件端面为研究对象,通过物理增强试验法对其端面增强工艺进行研究.结果表明:在木构件端面复合粉状碳纤维可有效提高木构件端部的力学性能;采用非刚性施压方法可促使碳纤维与木构件端面的工艺复合;对木构件端面进行高温热处理可使木材端面获得200条·dm-2以上的分布较均匀的可见裂纹;内层0.5 mm、外层2 mm的碳纤维涂层的增强效果最好;水曲柳、落叶松、桦木木构件端部横向抗拉强度分别提高55%、46%和59%.
To improve mechanical property of wood for high safety and durability,carbon fiber reinforced polymer/plastic （ CFRP） were aplied to reinforce wood member＇s end based on physical enhancement method. Then tensile strengths of wood samples from different tree species,combinations of coatings,pretreatments and pressure methods were compared. Results showed that powdered carbon fiber effectively enhanced the transverse mechanical properties of wood member＇s end. Non rigid pressure improved the bond strength between carbon fiber and wood member＇s end. Heat treatment resulted in more than 200 pieces of unifornly distributed visible cracks per square decimeter. Carbon fiber layer,comprising of a inner layer in the thickness of 0.5 mm and outer layer in 2 mm demonstrated the highest tensile strengths among all tested coatings. Transverse tensile strength of manchurian ash （ Fraxinus mand- shurica）,larch （Larix olgensis） and birch （Betula platyphylla） was increased by 5 5 % and 4 6 % and 59%,respectively by above-mentioned methods.
出处
《福建农林大学学报（自然科学版）》
CSCD
北大核心
2016年第5期586-592,共7页
Journal of Fujian Agriculture and Forestry University:Natural Science Edition
基金
国家自然科学基金资助项目(31300484)
南京林业大学高学历人才基金资助项目(NJFU)
江苏省大学生创新创业资助项目(201510298029Z)
关键词
粉状碳纤维
木构件端面
复合工艺
抗拉强度
powdered carbon fiber
wood member＇s end
composite technology
tensile strength
