Reinforced concrete bridges - Computational Analysis and Design of Bridge Structures - page 124

9.75 m—out to out superstructure
8.53 m—clear roadway

0.61 m 1.22 m 3.05 m 3.05 m 1.22 m 0.61 m

Shoulder Lane

Concrete overlay

Lane Shoulder

Sewer
sleeve

Epoxy coated 64 mm sewer

2% 2%

1 2 3 4 5 6 7 8

Slab nos 1.22 m × 0.38 m precast unit

4.88 m 4.88 m

8 precast units @ 1.22 m

(a)

Slab 1

N

Slab 2

Slab 3

2.13 m

Slab 4

Slab 5 Post-tensioning

2.13 m 2.13 m

Slab 6

Slab 7

Post-tensioning

Slab 8

(b)

N

3212

3213

Trac

3644

Crack on top surface
BDI strain transducer
underside of bridge
with corresponding ID
BDI strain transducer
on top surface of bridge
with corresponding ID

1643

1642

Trac

3215

1641 3214

(c)

Figure 4.19 Existing post-tensioned Knoxville slab bridge, Maryland. (a) Cross section.
(b) Plan view of precast beams and post-tensioning tie rods. (c) Plan view of
the strain transducer locations.