Redundancy analysis - Computational Analysis and Design of Bridge Structures - page 486

Figure 15.14 Grid of deck frame elements for PG Bridge.

Table 15.12 Attack scenarios for steel PG bridge
Attack
scenario

Charge weight
(lb TNT)

Blast location along
bridge length (ft)

1 674 347

2 1009 444

3 437 130

4 2911 361

5 1821 209

along the bridge's 184.7 m (606′) length. As in the previous example, charge
weights and locations were assigned based on their probability distributions
and were randomly generated to several scenarios (Mahoney 2007).
The static equivalent loads of each attack scenario are calculated.
Table 15.13 displays these calculations for attack scenario 1 as an exam-
ple. The blast load on each joint is calculated the same way as the previ-
ous example. In Table 15.13, the pressures that appear in bold are greater
than or equal to 200 psi (1.38 MPa), so the corresponding joint loads of
these pressures are applied to the PG bridge model. Figure 15.15 shows
the static equivalent joint loads for attack scenario 1 applied to the PG
bridge model.