湿、热、静力荷载对速生杉木顺纹抗压强度的影响  

Effect of Hygrothermal and Mechanical Loads on Compressive Strength Parallel to Grain of Fast-growing Chinese Fir

作　　者：王志强[1] 王转转[1] 唐岳磊 董惟群 魏鹏 卢晓宁[1] WANG Zhi-qiang WANG Zhuan-zhuan TANG Yue-lei DONG Wei-qun WEI Peng LU Xiao-ning(College of Materials Science and Engineering,Nanjing Forestry University,Nanjing Jiangsu 210037,China Xuzhou Shenghe（ Sterling Pacific） Wood Industry Co. Ltd. ,Xuzhou Jiangsu 221321, China)

机构地区：[1]南京林业大学材料科学与工程学院,江苏南京210037 [2]徐州盛和木业有限公司,江苏徐州221321

出　　处：《林业机械与木工设备》2016年第11期34-37,42,共5页Forestry Machinery & Woodworking Equipment

基　　金：“十二五”国家科技支撑计划项目(2015BAL03B03)

摘　　要：研究不同湿热环境中,在湿、热荷载、静力荷载作用下速生杉木的顺纹抗压强度,并分析了温度、相对湿度、静力荷载和保载时间4个因素对速生杉木顺纹抗压强度的影响。试验结果表明,速生杉木顺纹抗压强度随环境温、湿度增高而降低,环境温度对速生杉木顺纹抗压强度影响非常显著;在相同的静力荷载条件下,有湿、热荷载同时作用的速生杉木顺纹抗压强度降低,平均降低幅度为20.10%;湿、热、静力荷载共同作用对速生杉木顺纹抗压强度存在耦合影响。The compressive strength parallel to the grain of fast - growing Chinese fir under various hygrothermal environmentswith hygrothermal and mechanical loads are studied in this paper. The effects of hygrothermal and mechanicalloads and loading time on the compressive strength parallel to the grain of fast - growing Chinese fir are also analyzed.It is found that the compressive strength parallel to the grain of fast - growing Chinese fir decreases with the increasein the ambient temperature and relative humidity （ RH） of the loading environment and that ambinet temperaturehas a significant effect on the compressive strength. In addition,the compressive strength decreases 20. 10% averagelyunder the hygrothermal loads compared with that only having same mechanical load. The coupling effect onthe compressive strength parallel to the grain of fast - growing Chinese fir is found when hygrothermal and mechanicalloads act together.

关 键 词：湿、热、静力荷载 耦合作用 顺纹抗压强度 速生杉木 

分 类 号：TS612[轻工技术与工程]