Civil Engineering Reference
In-Depth Information
The constructive details for the superstructure were designed. These include the form-
work and reinforcement of the precast composite girders, the formwork and reinforcement
from the cast-in-place concrete deck and the frame nodes reinforcement. The project also
includes plans for auxiliary works. For example the river bank protection in area of the bridge
was designed using gabions with terramesh modules. Also, the steel parapet was chosen ac-
cording to the traffic type and volume.
4. Conclusions
The mono-WIB is an economical solution, as it requires low steel consumption and the pre-
fabrication in the factory is facile. The steel profiles are obtained from regular rolled profiles
without significant material loss, and their use is efficient acting as external reinforcement.
No bearings and no expansion joints are provided, assuring simultaneously facile mainte-
nance and driving comfort.
Using new technologies for the renewal process fallowing advantages are obtained:
Robustness of the structure.
Very slender and aesthetic bridges due to the optimal combination of high tensile
strength of structural steel and the high compressive strength of concrete; costs are also
minimized.
High durability of normal reinforced concrete decks due to restrictive crack width limi-
tation.
Due to the low dead weight of the composite bridges' deck, composite bridges have
advantages with regard to the foundation and settlements of supports.
In comparison with steel bridges, composite highway bridges have a better behavior
with regard to deck freezing in winter.
Due to innovative methods the erection time is very short.
Reduced environmental impact in comparison with other bridge types.
Facile and cheap maintenance.
Important delays (even if at that time the bridge in Frânceşti was an absolute premiere
in Romania), due to missing financial possibilities postponed the realization of the bridge in
Frânceşti. Than the Romanian ECOBRIDGE team took the decision to analyze a new struc-
ture situated on the A1 motorway, part of the Orăştie - Sibiu motorway sector, lot 1 at km
8+755, which fulfills all conditions of the initial ECOBRIDGE project. The construction of
the bridge at Frânceşti will hopefully soon be resumed, than the local community will safely
travel.
References
[1]
RFCS research project, “ECOBRIDGE: Demonstration of economical bridge solutions based on innovative
composite dowels and integrated abutment, Grant no. RFSP-CT-2010-00024”, 2010
[2]
Pak, D. et al., “Economic and Durable Design of Composite Bridges with Integral Abutments - Final Report
RFSR-CT-2005-00041”, Brussels, RFCS publications, European Commission, 2009
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