福建土楼和贵楼旧木质构件材性研究  

Research on Wood Properties of the Ancient Woody Components in Hegui Earth Building

作　　者：赖惟永[1] 于再君[1] 刘喜明[1] 林乙煌[1] 卢成东[1] 

机构地区：[1]龙岩学院,福建龙岩364000

出　　处：《龙岩学院学报》2015年第5期85-88,共4页Journal of Longyan University

基　　金：龙岩学院服务海西建设项目(JB10152);龙岩学院服务海西建设重点项目(JB10169);闽台客家研究院研究规划课题

摘　　要：以福建土楼和贵楼修缮时更换下来的10根不同类型的旧木质构件为材料,鉴定树种后,根据国家标准划分的5个木材腐朽等级,制取96个标准试件,对无腐朽旧木材及不同腐朽等级的旧木材试件进行材性实验,得到了旧木材各项物理力学性质的不同变化.结果表明:这10根旧木质构件都属于杉木.与新鲜木材相比,使用282年后,无腐朽旧杉木密度无明显变化,横纹抗压强度、顺纹抗压强度、抗弯强度、抗弯弹性模量均明显降低.不同腐朽等级的旧杉木,随着腐朽程度的加剧,密度逐步降低,力学强度迅速衰减,特别是达到"三级"腐朽时,密度降低了约28%,横纹抗压强度降低了约60%,顺纹抗压强度降低了约55%,抗弯强度降低了约78%.This article demonstrates the wood property experimentations of 96 standard wood samples made after tree species identification of 10 different types of ancient woody components removed from Hegui Earth Building in Fujian Province when it was renovated. During the experimentation, different changes of physical and mechanical properties of the samples which were classified into 5 decay grades according to national standard were presented. The results shows that among the 10 ancient woody components which were identified as Chinese fir, when compared with the fresh wood, the density of the non-decayed Chinese-fir has no significant change after 282 years of use, while there is obvious decrease in compression strength perpendicular and parallel to grain, flexural strength and bend elastic modulus. The density gradually decreases and mechanical strength rapidly attenuates as the decay grade becomes higher, especially when the decay grade reaches“three”, the density decreases by 28%, compression strength perpendicular to grain by 60%, compression strength parallel to grain by 55% and flexural strength by 78%.

关 键 词：和贵楼 旧木质构件 物理力学性质 强度衰减 

分 类 号：S781[农业科学—木材科学与技术]