• Dr. Ing. A. Aas-Jakobsen AS (Aas-Jakobsen) and Arup

    1915 Çanakkale Bridge

    Çanakkale, Turkey

Project Summary

Project

Arup and Aas-Jakobsen conducted an independent design check on what will become the world’s longest suspension bridge, combining international knowledge of long-span bridge design, structural engineering, and geotechnical engineering. The 1915 Çanakkale Bridge will have a main span of 2,023 meters, side spans of 770 meters, a tower height of 318 meters, and a total length (including approach bridges) of 4,608 meters. The bridge is situated near the historic site of Gallipoli, about 250 kilometers southwest of Istanbul. It will connect the Asian and European continents and is part of the new highway between Kınalı and Savaştepe. The main challenges for the design are the record span and the geotechnical conditions at the site, as a result of the bridge being located in a seismic region, and the aerodynamic stability. To address the latter issue, the designer chose a split deck design, and the behavior has been confirmed by extensive wind tunnel testing.

Solution

To address aerodynamic stability, a split deck design was chosen and its behavior confirmed by wind tunnel testing. Aas-Jakobsen and Arup developed an advanced model of the bridge by utilizing a combination of integrated modeling functions and the versatile input script capability in RM Bridge (now consolidated into OpenBridge Designer, an integrated bridge solution to meet the modeling, design, and construction needs of bridge software users). The program allowed full geometry and cable force control, even for highly flexible structures like long suspension bridges, which would have been difficult to design without these capabilities. The team used the wind module to verify the split deck and performed time history analyses with non-linear bearings and dampers to verify the seismic behavior. The team also used spreadsheets to deliver extensive data for detailed local analyses and design checks throughout the process.

Outcome

By using Bentley’s RM Bridge analysis software, the team was able to accurately model the behavior of this long and flexible bridge. This capability helped reduce errors during bridge design verification and improved collaboration, saving time during the process and streamlining decision making. 1915 Çanakkale Bridge is on schedule to be completed in 2023, in time for the centennial of the Turkish Republic.

Software

RM Bridge provided the necessary integrated modeling, analysis, and output functions for the team to manage the complex engineering demands. The application’s advanced dynamic capabilities allowed engineers to verify both aerodynamic and seismic behavior.

Project Playbook: RM Bridge (now consolidated into OpenBridge Designer)

Outcome/Facts
  • Arup and Aas-Jakobsen performed an independent design verification of the 1915 Çanakkale Bridge for the Contractor Daelim – Limak – SK EC – Yapı Merkezi Joint Venture (DLSY JV) where the Employer is Turkish General Directorate of Highways (KGM).
  • The team used RM Bridge to develop a global model of the bridge, allowing full geometry and cable force control, advanced wind analysis, and nonlinear seismic time history analysis.
  • The 1915 Çanakkale Bridge, set to become the longest suspension bridge span in the world, is on schedule to be completed in 2023, in time for the centennial of the Turkish Republic.
Quote:
  • “Highly skilled expertise has been gathered together and led by Arup, providing independent verification to all aspects of this exceptional bridge. We are proud to contribute to such a landmark project that allows us to use our specialist skills in geotechnical, seismic, ship impact, and long-span bridge engineering.”

    Matt Carter Global Bridge Skills Leader Arup