Numerical Analysis Of Shear Lag In Curved Box Girder Under Seismic Loads

The form of curved box girder bridges is widely used in bridge engineering. The presence of curvature causes the effect of bending and torsion coupling effect on the bridge, which makes the shear lag effect more seriously on the bridge and bring some impact to the safety of the bridge. At present, domestic and foreign scholars have done a lot of theoretical research and experiments for the model, but research for the shear lag effect in the shear curved box girder under seismic loads is rarely involved. In practical engineering, the seismic loads will have a significant impact on the shear lag effect in the bridge. Therefore, this article has done the following work:1. Using finite element analysis software ANSYS, select the appropriate finite elements type, establish separately the curve single cell box girder box double and single rooms.2. Select three seismic waves from earthquakes recorded, type them into the bridge model established separately from vertical direction, along the bridge and transverse the bridge, analysis and compare the shear lag distribution of the curved box girder under earthquake roof, floor transverse and condition of the floor and roof longitudinal stress response.