Innovative composite overpasses on the Romanian A1 motorway - Economical Bridge Solutions based on Innovative Composite Dowels and Integrated Abutments - page 162

Figure 35: „s stat ” values from dynamic test load schema 3, 4 - LC3,4 (v = 50 km/h) and
load schema 2 - LC2,5 (v = 30 km/h)

As load test conclusions, the structure has had a proper behaviour considering the fol-
lowing aspects:

the bridge or its elements do not present important deformations, exceeding the elastic
ones, or losing of stability;
at a close inspection no cracks were observed;
flaws which could affect the functionality of the bridge did not appear;
displacements were within the limits recommended by the technical documentation;
the unitary stresses in the areas with maximum stress are close to those resulted from
the calculus.

6. Conclusions

In case of the two overpasses from Orăştie - Sibiu Motorway - lot 1, the theoretical concept
- the new VFT ® cross section was put in practice for the first time in Romania, as well being
a engineering premiere. Combining the theoretical aspects of the new solution with a proper
technology a significant material reduction with a minimum steel consumption of 130 kg/m 2
was obtained; in the end having two slender, robust and economical structures.

7. Project participants

For both motorway bridges the project participants were:
Client Compania Naţională de Drumuri şi Autostrăzi din România

Construction company STRABAG s.r.l

Engineering structures SSF-RO s.r.l. and SSF Ingenieure AG