Response Surface-Based Finite Element Model Updating of Steel Box-Girder Bridges with Concrete Composite Decks

Figure 3

Calculated mode shape of the initial finite element model. (a) First-order asymmetric vertical bending (3.77 Hz). (b) First-order symmetric vertical bending (4.99 Hz). (c) First-order symmetric torsion (5.30 Hz). (d) First-order asymmetric torsion (7.47 Hz). (e) Second-order symmetric torsion (11.96 Hz). (f) Second-order asymmetric torsion (14.95 Hz).

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