摘要
为研究弹性模量及截面尺寸变化的竹压杆稳定承载力,对毛竹几何特性(外径、壁厚、惯性矩)、密度和抗压强度沿高度方向的分布规律进行了研究,基于大量试验数据拟合出了不同高度处毛竹的几何特性、表观密度、抗压强度的预测方程,在获得惯性矩、弹性模量与高度的简化关系后推导出考虑弹性模量、截面变化的毛竹压杆稳定承载力公式,结果表明:毛竹的几何特性、抗压强度与其高度相关性较大,且获得的性能预测方程具有较好的预测效果,可作为评价毛竹竹材几何特性、抗压强度的参考;推导出的竹压杆稳定承载力公式简洁、适用性强,且计算精度较高。
To determine the stable bearing capacity of bamboo compression rods with varying elastic modulus and section size,the distribution law of geometric characteristics(outer diameter,wall thickness and moment of inertia),density and compressive strength along the height direction of bamboo was firstly studied.Based on a large number of experimental data,the prediction equations of geometric characteristics,density and compressive strength of bamboo at different heights were fitted.After obtaining the simplified relationship between moment of inertia,elastic modulus and height,the formula of stable bearing capacity of bamboo compression rods was derived,which considered the change of elastic modulus and cross section.The results show that the geometric characteristics and compressive strength of bamboo are highly correlated with their height,and the performance prediction equation obtained has a good prediction accuracy,which can be used as a reference for evaluating the geometric characteristics and compressive strength of bamboo.The formula of stable bearing capacity of bamboo compression rods is simple,applicable and accurate.
作者
郝际平
许佳
田黎敏
栗蕾
HAO Ji-ping;XU Jia;TIAN Li-min;LI Lei(Department of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an,Shaanxi 710055,China;Department of Civil Engineering,Zhengzhou Institute of Aeronautical Industry Management,Zhengzhou,He’nan 450046,China)
出处
《工程力学》
北大核心
2025年第4期78-86,共9页
Engineering Mechanics
基金
科技部国家重点研发计划项目(2017YFC0703500)。
关键词
毛竹
轴向受压杆件
弹性模量
能量法
稳定承载力
Moso bamboo
axial compression member
elastic modulus
energy method
stable bearing capacity
