References

Rao II Vietnam

Rao II Bridge, During Construction

Rao II cable-stayed bridge crosses Lach Tray river about 1 km upstream from Rao (I) bridge in the coastal city of Haiphong, situated in northern Vietnam 100 km from Hanoi. Some technical bridge parameters:

• One pylon cable-stay bridge, peak height +47.363 m.
• Constant steel and concrete girder structure.
• Length: 248 m.
• Span: (70+120+40) m = 230 m.
• Width: 25.5 m (4 lanes for motor vehicle and 2 lanes for others)
• Ship passing clearance 7m (frequency 5%), width 50 m.
• Designed loading capacity: Car HL-93, according to 22-TCN-272-01 standard enforced in 2001 by Ministry of Transport.
• Leading path: 700 m (500 m + 200 m) length on 2 sides, designed as main street grade II standard, speed allow 80 km/h.

Rao II Bridge, Plan

TDV was involved as independent checker for the erection sequence proposed by MT Højgaard, Denmark. The work included modelling of the structure, finding optimal cable-stay stress values, camber and fabrication shapes calculation of steel girders, simulation of erection sequence (erection control).

Rao II Bridge, Numerical Model

• Contract:
  • Rao II, Vietnam
• Owner:
  • Government of Vietnam
• Consultant:
  • MT Højgaard, Denmark
• State of Construction:
  • In construction, expected completeion in 2013
• TDV Involvement:
  • Structural modelling
  • Cable stressing optimization
  • Camber and fabrication shapes calculation of steel girders
  • Simulation of erection sequence (erection control).
  
  TDV Consulting GmbH
  Dorian Janjic & Partner
  A-8010 Graz, Austria