摘要
木材是中国古代建筑的重要建筑材料,试验选用5种木材进行了顺纹径向、弦向以及斜向抗弯测试,使用自制的力传感器,实现数据自动记录。根据木材受弯破坏现象,总结得出木材破坏的3个阶段;分析了木材受弯力-位移曲线,得出木材弹性变形所占比例较大,塑性性能与木材的树种和受力方向有关;木材顺纹抗弯强度与气干密度存在显著的二次多项式回归关系,并拟合得到木材顺纹抗弯强度与气干密度关系表达式。
Wood is an important building material of ancient Chinese architecture. Five kinds of wood were selected to conduct bending test in radial, tangential and slant direction parallel to grain in this experiment. Self-made force sensor was used to record data automatically by being connected with the computer. The study shows that the wood bending damage process can be divided into three stages. According to wood bending force-displacement curve, the elastic deformation takes greater proportion of wood deformation, and the plastic properties are related to tree species and the direction of force applied to the wood. There is an obvious quadratic regression relationship between wood bending strength of parallel to grain and density and fitting the expression.
出处
《四川建筑科学研究》
北大核心
2016年第6期16-20,共5页
Sichuan Building Science
基金
国家自然科学基金重点项目(51338001)
国家自然科学基金资助项目(51278324)
关键词
木结构古建筑
抗弯强度
破坏形式
弹性性能
塑性性能
气干密度
aged timber building
bending strength
failure modes
elastic properties
plastic properties
air-dry density
