Civil Engineering Reference
In-Depth Information
or even more. There are no footways and no borders. The safety parapet is missing, the traffic
participants being in danger. Water discharging devices are also missing on the bridge.
The total length of the bridge is 9,90 m and the width is 9,0 m. The present cross sec-
tion consists of a reinforced concrete slab of C8/10, having a thickness of approx. 0,40 m
(“Fig. 3”). The carriageway, made out of asphalt concrete, presents cracks on extended areas.
The infrastructure presents degradations, caused by waters (“Fig. 4”). There is a geotechnical
study based on geotechnical investigations, presenting the layers of the foundation ground.
The bridge is situated in a seismic zone; according to the Romanian Standards, no measures
for anti-seismic protection have to be taken.
Figure 4:
Structure degradations
The present viability state of the structure is not satisfactory, which leads to the neces-
sity of replacement with a new structure. The highway bridge presents damages as a result
of actions, fatigue and creep. The replacement of the existing structure with the VFT-WIB
®
solution (developed from the classical WIB composite structure) was proposed.
2. Technical details of the applied solutions
A classical filler beams deck could be an adequate solution for the span and heights imposed
for many existing structures especially railway bridges. Going further and taking into con-
sideration also the need of a simple technology and a very short erection time, it leads to the
necessity of a modular system with low costs. Using the high degree of prefabrication the
possibility of unexpected situations on site is reduced and lower costs are obtained. Simulta-
neously it offers execution simplicity. The VFT-WIB
®
solution was obtained from the clas-
sical WIB composite structure, considering the improvements mentioned before (“Fig. 5”).
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