The Structural Engineer > Archive > Volume 72 (1994) > Issues > Issue 3 > A Note on the Elastic Theory of Stiffened Suspension Bridges
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A Note on the Elastic Theory of Stiffened Suspension Bridges

The basis of the so-called elastic theory is that a stiffened suspension bridge is a linearly elastic statically-indeterminate structure. The theory is appropriate when the stiffening (deck) girder is the primary source of stiffness, as for some 19th century bridges for railways and for some more recent minor structures. Otherwise, gravity stiffness is dominant, as (for example) for recent major suspension road bridges designed by the modern so-called deflection theory (for such structures the elastic theory would overestimate girder bending moments by a factor of two at least, according to Martin). Professor T.M. Charlton