Abstract
The corrugated steel webs composite box girder bridge is a new bridge structure with corrugated concrete webs with fold effects, which can replace traditional concrete webs. Compared with traditional concrete web box girder, the application of steel webs greatly reduces the weight of the bridge. At the same time, the utilization of steel web has significantly improved the shear capacity of the web, reducing the occurrence of inclined cracks which is conducive to the full use of materials. Due to the shear lag effect, normal stress distribution of the box girder at bending moment is not uniform. However, the web of corrugated steel web is overall corrugated and the transverse contact width between the web, the roof and the bottom plate is large, which can effectively reduce the shear lag effect of the box girder. In this paper, the energy variation method in calculating the shear lag coefficients of the box girder with corrugated steel webs was first introduced. Then the modeling of the box girder with corrugated steel webs was constructed by using finite element analysis software ANSYS while the energy variation method was used to verify the results. The results show that the finite element method can be better used to simulate the shear lag effect of the composite box girder bridge with corrugated steel webs, and the variation regularity of the transverse and longitudinal shear lag coefficients of the composite box girder bridge with corrugated steel webs was also explored.
