Shear lag effect formula of corrugated steel webs based on spring model

The stress characteristics of composite box girder with corrugated steel webs are quite different from those of ordinary concrete box girder. In order to study the normal stress distribution law of the upper and lower flange plates of the corrugated steel web shear lag effect, the corrugated steel web flange plate is reasonably equivalent to the longitudinal parallel parallel spring model. The minimum potential energy principle is used to understand the warping displacement function form of the corrugated steel web, and the normal stress distribution of the wing plate is obtained. Finally, the calculation formula for the normal stress distribution of the corrugated steel web flange plate is obtained. By comparing the calculated values and the measured values with the finite element values, it is found that the formula has good applicability to solve the normal stress distribution of corrugated steel web box girder under shear lag effect.