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This page is devoted to frequently asked questions (FAQ) related to bridge deck sections. |
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How can I model a steel-girder bridge with variable flange thickness?
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Answer: Users may model a steel-box-girder bridge using the Precast-Concrete U-Girder option for the bridge-deck section. Users should then assign steel material to the frame section, as shown in Figure 1:
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Figure 1 - Steel U girder assignment
Can I model a bridge with prestressed box beams and a cast-in-place deck?
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Answer: The bridge-deck section is a composite cross section. Stresses acting local to each bridge component will produce an axial force those elements, such as with the girder. When the bridge is not longitudinally restrained, an equilibrium condition results from the net axial force in all components being zero. Users may notice that a significant bridge-girder axial force is balanced by an equal and opposite longitudinal force in the slab.
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