不同条件下圆竹径向抗压力学性能

Mechanical Properties of Bamboo-culms in Radial Compression Under Different Conditions

以毛竹为研究对象,选用恒温恒湿(a)、气干(b)、蒸煮(c)、低温(d)和超低温(e)方法对圆竹进行处理,分析了不同处理条件对圆竹径向单轴向和双轴向抗压力学性能的影响,以及其径向抗压变形破坏特性。研究结果表明:相同处理条件下,圆竹的径向双轴向压缩承载能力均大于其单轴向压缩的承载能力;不同条件处理后,径向单轴、双轴向压缩强度σ单和σ双的排序分别为:σ单e>σ单d>σ单c>σ单a>σ单b和σ双e>σ双d>σ双a>σ双c>σ双b;圆竹的径向抗压力学性能同试件含水率和环境温度相关。

An experiment was conducted to study the differences in uniaxial and biaxial compression of bamboo eulms under various treatments, including constant temperature and humidity, air drying, steaming, low temperature and ultra-low temperature, using Mao bamboo as experimental materials. The failure characteristics of radial compressive defomlafion of bamboo culms were also analyzed. Results show that the mechanical properties of the bamboo cttlms at radial direction under biaxial compression are better compared with those under uniaxial testing. The biaxial compressive strength of bamboo culms under ultra-low temperature is the highest, followed by low temperature, steaming, constant temperature and humidity, and air drying, while the uuiaxial compressive strength of bamboo culms under ultra-low temperature is the highest, followed by low temperature, constant temperature and humidity, steaming, and air drying. The radial compressive strength of bamboo culms are correlated with moisture content of bamboo samples and air temperature.