Abstract
As is known, suspension bridges are much lighter in their total weight than those of other designs. This is their indisputable advantage. It is no coincidence that these bridges are widely used in practice. However, along with the indisputable advantages, they are quite sensitive to wind loads generating bending and torsional oscillations of spans at certain transverse air velocities. If the bridge drag at a transverse airflow can be easily reduced by designing streamlined surfaces, then the bridge span surface stability under the action of bending and torsion forces can only be ensured by properly choosing its cross-sectional profile providing the required inertia moment as a required component of its stiffness.
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