It can be observed from Figure 2(a) that for the box girder
bridge, there are significant differences in deflection and normal stress at the mid-span when the brace spacing is reduced from 14 to 6 m.
Finite Element Models of Steel Box Girder
under Internal Blast Loading
During the construction, as shown in Figure 3, cracks have appeared on the new poured box girder
. Builders thought the cracks were possibly caused by blasting excavation, so they suspended construction and analyzed causes of that.
Under the effect of the vehicle load, according to the flat section assumption, the top plate of the box girder
along the longitudinal presents compression stress and the bottom plate presents tensile stress.
Maximum tensile stresses were developed at top fibers of box girder
section and bottom fibers were subjected to compressive stresses.
therefore, the ratio of shear force, bending moment and torsion for both 2 lane and 4 lane I and Box girder
is generated and a graph is plotted against the varying span length and given in figure 2 to 8.
Extending the spatial curved beam finite element theory considering effect of initial curvature developed earlier , the objective of this paper is to propose a 1D curved box girder
dynamic finite element of three nodes and twenty-one degrees of freedom taking account of tension, compression, bending, torsion, and warping and then apply it to analyze the natural vibration characteristics and dynamic response.
The uniform corrosion effect is the most important type of corrosion to affect steel box girder
By removing the midplate we obtain a monocellular (traditional) box girder
, whose deflection function takes a C shape, regardless of the value of load and the cross-sectional geometric parameters.
 developed a systemic one-dimensional finite difference program to predict the temperature distribution in the cross section of composite box girder
bridges with arbitrary geometry and orientation for a given geographic location and environmental conditions.
Because the principal stress is composed of normal stress and shear stress, the stress characteristics of box girder
cross-section is judged by principal stress.
With limited or no access to the inside of the box girder
in the field, it is difficult to quantify these types of result.