190 X. Li et al. Fig. 19.7 Overview of the FE model of French Creek Bridge Table 19.1 Material properties of concrete and steel Material type F0c (MPa) Ec (MPa) Density (kg/m3) Poisson ratio Foundation concrete 30 24,700 2400 0.2 Deck concrete 35 26,600 2400 0.2 Material type Fy (MPa) E (MPa) Density (kg/m3) Poisson ratio Structural steel 350 200,000 7900 0.3 Reinforcing steel 400 200,000 7900 0.3 Fig. 19.8 Deck section in structural drawing and FE model Fig. 19.9 Column section detail in FEM (left) and drawing (right) 19.5 Manual Model Updating As described above, the finite element model of the French Creek Bridge is developed based on the structural drawing and series of idealized assumptions, which may not be about to represent the real behavior of the actual structure. As shown in Table 19.2, significant deviation exists between experimental and analytical results. In order to achieve a more accurate prediction of the dynamic response of the bridge, a sensitivity-based manual model updating procedure is conducted on the initial FE model.
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