Effects of Stiffener Type on Fatigue Resistance of Steel-UHPC Composite Bridge Decks
Table 1
Comparison of different types of deck structures.
Scheme
Longitudinal rib
Deck parameters (mm)
Deck index
Thickness of top plate
Rib spacing
Height of rib
Thickness of UHPC layer
Thickness of pavement
Deck bending rigidity (mm4/m)
Steel consumption (kg/m2)
Total mass of deck (kg/m2)
1
8 mm U-rib
16
600
280
0
75
2.55 E + 8
199.8
383.3
2
8 mm U-rib
12
600
280
50
30
3.12 E + 8
168.4
389.7
3
12 mm bulb plat rib
12
500
260
50
30
2.55 E + 8
159.0
380.3
4
12 mm bulb plat rib
12
450
260
50
30
2.76 E + 8
166.2
387.5
5
12 mm bulb plat rib
12
400
260
50
30
3.01 E + 8
175.2
396.5
6
14 mm plate rib
12
300
210
50
30
1.50 E + 8
171.1
392.4
7
16 mm plate rib
12
350
240
50
30
2.04 E + 8
180.3
401.6
8
18 mm plate rib
12
400
270
50
30
2.70 E + 8
189.6
410.8
Note. Scheme 1 is a traditional orthotropic steel deck (OSD). Scheme 2 is UHPC composite deck with U-ribs (UCD-U). Schemes 3 to 5 are UHPC composite decks with bulb flat ribs (UCD-B). Schemes 6 to 8 are UHPC composite decks with plate ribs (UCD-P). The total mass of the deck includes the weight of longitudinal rib, steel top plate, UHPC layer, and pavement.
