Examples of Finite Element Models of Steel-Concrete Composite Bridges - Finite Element Analysis and Design of Steel and Steel-Concrete Composite Bridges - page 631

7.5 FINITE ELEMENT MODELING AND RESULTS
OF EXAMPLE 3
After modeling separate composite plate girders used in bridges, it is now
possible to model a full-scale four-span continuous steel-concrete composite
bridge, which is detailed in this example 3. The composite bridge was field
tested by Burdette and Goodpasture [ 7.31 ] to determine ultimate load
capacity and mode of failure of the composite bridge. The overall width
of the composite bridge width was 10,515.5 mm and the four spans were
of 21,336, 27,432, 27,432, and 21,336 mm, with a total length of
97.536 m as shown in Figures 7.15 and 7.15 . As shown in Figure 7.15 ,
the bridge had a haunched concrete slab with a constant thickness between
haunches of 177.8 mm. The concrete slab rested on four W36 170 steel
beams spaced at 2540 mm. The measured flange and web portions of the
steel beams had yield and ultimate tensile stresses of 275 and 450 MPa,
respectively. The concrete slab had a cylinder strength of 47.4 MPa. The
composite bridge was loaded at eight locations as shown in Figure 7.16

10,515.5 mm

177.8

W36×170

1447.8 3×2540 mm 1447.8

Figure 7.15 Cross section C-C of a four-span continuous steel-concrete composite
bridge.

Bearing
location

10,363 4267 12,802

C

2 606

1 829

1 646

1 829

2606

C

21,336 mm 27,432 27,432 21,336

Figure 7.16 Loading configuration of a four-span continuous steel-concrete composite
bridge.