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Torsion reinforcement - A4 road connection, Mosi south - Brunnen, Switzerland

Shear

Country 

Switzerland

Location 

Access bridge from Brunnen to Sisikon

Date 

2013

Duration 

1 Week

Case Study 

Torsion reinforcement with S&P C-Sheet 240 (FRP 2013_02)

Situation 

By utilizing staged construction, the Federal Road Office (ASTRA) is improving, in stages, the road safety for the Mositunnel and reconditions the road connection Brunnen south. The static verification showed that the access bridge from Brunnen to Sisikon must be strengthened to support torsion loading.

Solution 

In regular intervals of 10.80 meters, massive steel crosses are set in the box girders. To accommodate the hoop tension, the box girder is wrapped with six layers of S&P C-Sheet 240 400 g/m2 (Modulus of elasticity 240 kN/mm2). The carbon sheets are engineered to provide a design tension capacity corresponding to a 0.6% elongation.

Material 

Approximately 220 m2 S&P C-Sheet 240 400 g/m2

Application of S&P C-Sheet 240

Application of the S&P C-Sheets 240 300 mm wide at breakthrough

Finished reinforcement with UV-protection

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