Hybrid Composite Beam (HCB) Technology
The HCB is comprised of three main subcomponents – an FRP shell, compression reinforcement
and tension reinforcement. The compression
reinforcement consists of concrete that is pumped into
an arch conduit within the beam shell. The tension
reinforcement consists of high-strength steel strands
that run along the bottom flanges of the beam shell.
All of this is encapsulated in a fiber reinforced plastic
shell protecting the beam from salt corrosion and
providing added structural capacity. The HCB
provides for an environmentally sensitive bridge
solution having extended service life with minimal or no
maintenance. Twelve years of research
have been invested in the development of the HCB to
make this a viable technology.
- 100+ Year Service Life
- Maintenance Free
- No Painting
- No Spalling
- HCB shipping and erecting weight is 10% of a concrete beam
and 33% of a steel beam (for a typical 70’ span)
- HCB weight after filling is 33% of a concrete beam and same
weight as a steel beam (for a typical 70’ span)
- Lighter weight greatly reduces shipping and erection costs
- Lighter weight reduces cost of supporting substructures
REDUCED CARBON FOOTPRINT
- Shipping multiple beams on a single trailer significantly reduces
- Smaller crane for erection of beams significantly reduces
- HCB uses 20% of Portland cement compared to concrete
- HCB design is governed by serviceability criteria (deflections).
- HCB can be overloaded by 4 times legal load and remain
elastic (i.e. no permanent damage)
- HCB will not sustain damage from illegally overloaded vehicles
that damage concrete and steel beams.
INFINITE FATIGUE LIFE
- Since HCB is governed by serviceability criteria, live load stress
range is very low
- Infinite fatigue life in HCB is inherent
- Infinite fatigue life in steel beams is generally cost prohibitive
- Low stress range is below fatigue cycling threshold
Please call Harbor Technologies, LLC for additional information regarding Hybrid Composite Beams.