Abstract
The corrugated steel web of prestressed concrete box-girder with corrugated steel webs is in pure shear stress state. The shear-resistant capacity of the corrugated steel web is not determined by the shear strength of steel web, but controlled by the shear buckling strength of steel web. The shear buckling mode and ultimate shear capacity of corrugated steel webs are analyzed by nonlinear finite elements method. The corrugated webs are simulated by 8-node structure shell element. The simulation was done for the defect of corrugated steel web with uniform imperfections mode method, and the defects were included in the material nonlinearity and geometric nonlinearity. On this basis, the influences of corrugation configuration, the overall profile dimensions and steel thickness of corrugated webs on ultimate shear buckling load and buckling mode are investigated.
Highlights
Bridge with corrugated steel webs is a kind of composite-structure of steel and concrete using the corrugated steel webs instead of concrete webs for conventional prestressed concrete box girders
It is clearly that the linear theory of small deflection unable to consider the impact of the structure of the initial geometric imperfections, and unable to consider the impact of the material nonlinearity and geometric nonlinearity, and cannot describe the load and the displacement of the structure in the whole process performance
In order to more realistically reflect the actual structure stress state, the only way to analyze the structure is to use the nonlinear theory of large deflection, considering the material nonlinearity and geometric nonlinearity in the whole process
Summary
Bridge with corrugated steel webs is a kind of composite-structure of steel and concrete using the corrugated steel webs instead of concrete webs for conventional prestressed concrete box girders. Because of its fast construction, light weight, good ability of span, aesthetic appearance etc, prestressed concrete composite box-girder bridge with corrugated steel webs become more and more popular recent years. Since its appearance, this bridge was investigated and widely used in France, Japanese etc. It is clearly that the linear theory of small deflection unable to consider the impact of the structure of the initial geometric imperfections, and unable to consider the impact of the material nonlinearity and geometric nonlinearity, and cannot describe the load and the displacement of the structure in the whole process performance From this perspective, in order to more realistically reflect the actual structure stress state, the only way to analyze the structure is to use the nonlinear theory of large deflection, considering the material nonlinearity and geometric nonlinearity in the whole process.
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