基于表观属性的毛竹轴向抗压强度预测模型研究

MATHEMATICAL MODEL FOR THE AXIAL COMPRESSIVE STRENGTH OF MOSO BAMBOO BASED ON THE MACRO AND MESO CHARACTERISTICS

竹材是中国传统建筑中常用的建筑材料,不但轻质高强,而且绿色环保,具有"植物钢筋"的美誉。在发展绿色节能建筑方面,生长速度快、可分解再生、固碳效率高的竹子具有天然优势。然而,生物质材料力学强度具有离散性大等缺点,原竹的工程应用受到一定限制。为此,对湖北咸宁产毛竹采用无损预测,研究变量包括节间长度、外周长、截面积、壁厚、维管束面积占比、含水率变化等。在表观属性分析以及轴压试验的基础上,提出毛竹承载力评估模型,为竹材的工程应用提供参考。

Moso bamboo,reputed as"green steel",has the advantages of light weight,high strength,and being environmental friendly.Moreover,Moso bamboo with high efficiency of carbon sequestration,grows fast can be decomposed and recycled,making it particularly competitive for utilization in developing green energy-saving buildings.However,as a biomass material,the mechanical properties of Moso bamboo has the disadvantage of high discreteness,which has prevented it from being widely used.Non-destructive prediction was conducted on the bamboo specimens from Xianning,Hubei Province.The main variables include internode length,outer perimeter,cross section area,wall thickness,vascular bundles area ratio,and moisture content,etc.Based on the macro and meso characteristies analysis and axial compressive tests,a mathematical model for the bearing capasity of Moso bamboo was developed.The current research work could provide theoretical reference for the application of bamboo in engineering.