elementary beam meaning in Chinese

基本光束
元光束

In elementary beam bending theory , it is assumed that the stresses are constant through the width of the beam . however , for the wide flange girders , the stresses are not uniform
按照初等梁理论即假定翼缘板具有无限抗剪刚度,宽翼缘箱梁在荷载作用下翼缘的正应力沿着宽度方向上是均匀分布的。
This variation of stresses is due to the action of in - plane shear strain in the plate , which is termed “ shear - lag ” . stresses larger than the elementary bending uniform stress thus develop at the web - flange connection . an appropriate reduced “ effective width ” of the plate - with the uniform stress equal to the maximum longitudinal stress - has been widely used by engineers in conjunction with the elementary beam bending theory
但实际上翼缘中剪切变形是不均匀的,由此导致正应力沿桥宽呈曲线分布,从而引出了有效宽度的概念,即按初等梁理论的公式也能得与真实应力峰值接近相等的那个翼缘折算宽度。