Table 4: Dynamic responses of unstrengthened composite bridges.

Number of steel girdersDirection of moving trucksMax. deflection (m)Max. principal stress (MPa)

3Single lane0.013669.5
Dual lane with the same directions0.015178.5
Dual lane with opposite directions0.015178.5

5Single lane0.009346.5
Dual lane with the same directions0.009747.5
Dual lane with opposite directions0.009747.5