In order to position the prestressed concrete beams
accurately, and subsequently obtain accurate elevations for all substructure
components, including bearings, bearings seats and piers,
OpenBridge Modeler allows you to
input the beam haunch at the center of the beam for both the start and end of
each beam. If no bearings are input, the haunch thickness is modeled at the
start and the end of the beams. However if the bearings are input, the haunch
thickness input is considered at the bearing lines instead.
If the Compute option is checked, you can input a minimum
clearance value and a residual camber value at erection, and
the program will automatically compute the Haunch thickness
values at both start and end of the beam. Minimum clearance
is measured at the edge of the beam flange, and is verified
all along the beam length.
Options to copy the values from one beam to others is
Diagram showing location of measurement of Beam Haunch at
along beam at start and end
Beam Haunch is measured at the center of the beam
At this time, the prestressed beams are
not drawn with the initial camber (due to prestress+Self
weight), but only modeled straight across.