竹材增强单板层积材的动态与静态弯曲性能  

The Comparison of Dynamic and Static MOR of Bamboo Strengthened LVL

作　　者：张心安[1] 朱一辛[1] 程丽美[1] 范玉凯[1] 

机构地区：[1]南京林业大学竹材工程研究中心,江苏南京210037

出　　处：《南京林业大学学报（自然科学版）》2006年第1期69-71,共3页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家高技术研究发展计划项目(2002AA24517);江苏省科技攻关项目(BE2003309)

摘　　要：研究了A、B两种不同结构的竹材增强单板层积材在1～500mm／min的不同加载速度下的静曲强度及动态弯曲强度。结果表明：两种结构的静曲强度均随着加载速度的加快呈增加的趋势；加载速度较低时，A型结构的静曲强度比B型结构的大；加载速度超过150mm／min后，B型结构的静曲强度大于A型结构的。两种结构的动态弯曲强度均比各自的静曲强度大，且A型结构的动态弯曲强度明显大于B型结构的。The static three-point bending test at different loading rates from 1mm/min to 500 mm/min and dynamic bending test of two different structures （A and B） of bamboo strengthened Laminated Veneer Lumber （LVL） were carried out. The relation between them was investigated. The result showed that the treads of MOR of A and B is enhanced while the loading rate increases. The MOR of A is larger than that of B at a low loading rate, The MOR of B is larger than that of A while the loading rate is more than 150 mm/min. The dynamic MOR of A and B is larger than the static MOR respectively and the dynamic MOR of A is larger than that of B obviously.

关 键 词：单板层积材 竹材 静曲强度 动态弯曲强度 加载速度 

分 类 号：S795[农业科学—林木遗传育种]