摘要
对木工字梁的挠度进行了公式推导、试验、计算和验证分析。结果表明,考虑剪切变形时,实测挠度值与预测挠度值非常接近;忽略剪切变形时,实测值和预测值相差非常大。理论和实测证明了在计算木工字梁挠度时剪切变形是不可忽略的。采用试验方法可以得到木工字梁的EI和K值,其可用于准确预测木工字梁的挠度,为木工字梁挠度计算和预测提供了一种比较简单的方法。
The formula derivation, test, calculation,verification and analysis of the deflection of wood I-beam are conducted. The results show that considering shearing deformation,the measured deflection value is very close to the predicted deflection value while there is a big difference between measured value and predicted value when ignoring shear deformation. Theory and real measurement show that shear deformation can＇t be ignored when calculating the deflection of wood Z-beam. Such values as EI and K of wood I-beam can be obtained through the test, and those values can be used for the accurate prediction of the deflection of wood I-beam, which provides a comparatively simple method for calculating and predicting the deflection of wood Z-beam.
出处
《林业机械与木工设备》
2011年第9期40-42,45,共4页
Forestry Machinery & Woodworking Equipment
基金
林业公益性行业科研专项(200904016)
国家标准制定计划项目(20071684-T-432)
引进国际先进林业科学技术创新项目("948"计划)(2006-4-C04)
关键词
木工字梁
木工字搁栅
挠度
剪切变形
wood I-beam
wood I-joist
deflection
shear deformation
