Siguificant deviation occurs only when the beam is not slender or for sandwich constructions with very soft core material in which shear deflection becomes significant.

• 只有当桥不是很细长，或者是用很软的材料做芯子构成夹心结构的情况下，才会产生明显的偏差，因为这两种情况下剪切挠度都很大。