木结构中轴心受压构件的纵向弯曲系数(?)值,原规范系根据没有木节的构件试验而制定的。而且假定木材顺纹受压弹性模量与其顺纹受压强度的比值,对于不同树种和不同含水率的木材均为定值。鉴于工程实践中大量应用的木材均为有木节的,而且在新规 The value of the longitudinal bending coefficient (?) of the axial compression member in the wooden structure was determined on the basis of the test of the component without the section. It is also assumed that the ratio of the modulus of elasticity of the wood to the compressive strength of the wood along the grain is proportional to the compressive strength of the grain, and it is a constant value for the wood of different tree species and different water content. In view of the fact that a large number of woods are used in engineering practice, there are wood sections and new regulations