PGSuper  3.0
Precast-prestressed Girder Bridges
Splitting Zone Checks

The reinforcement in the splitting/bursting zone is checked in accordance with LRFD 5.10.10.1. The area of shear reinforcement in the splitting zone is computed as

Av = SUMMATION(Number of Legs)(Bar Size)(Length)/(Spacing)

Length is the length of the stirrups zone that is contained within the splitting zone.

Example

Zone Start (ft) End (ft) Bar # Legs Spacing (in)
1 0.00 1.00 #5 2 6
2 1.00 4.00 #5 2 9

Zone Length = 2.00 ft

Av = 2(0.31 5.10.10.1)(1.00 ft)/(0.5 ft) + 2(0.31 in2)(1.00 ft)/(0.75 ft) = 2.066 in2

NOTE: WSDOT standard practice deviates from the LRFD specifications as outlined a June 2001 Design Memorandum