Bridges, Tunnels and other Transportation Structures
Full Session with Abstracts
The 1915 Çanakkale Bridge is a world record 2023m main span suspension bridge located at the Northeastern end of the Çanakkale Strait in Turkey where it connects the Gelibolu district to the Northwest with the Lapseki district to the Southeast. The detailed design for the bridge has been prepared in a challenging short period of only 12 months. Construction of the bridge commenced in 2018 and the bridge construction will be completed in 2022.
Significant design challenges for aerodynamics, ship collision, seismic and poor soil conditions have been managed for the design of the bridge. Since the bridge site is located in a windy strait with high wind speeds, the long slender stiffening girder of the bridge is designed as a twin-box steel girder, innovatively prepared for the purpose of a wind-resistant design. The aerodynamic performance of the bridge is confirmed by analytical and numerical analyses verifying the safety of the bridge structure.
The strait has a very dense ship traffic including the world largest ships and with a large growth rate leading to significantly more ships passages 50 years after opening of the bridge. The bridge is sited in a seismically active region and strict requirements from the Owner to have minimal damage for non-accessible structures for a 2475 year return period earthquake and ship collision load is affecting significant parts of the substructure design.
The geology along the bridge alignment ranges from very soft rock to complex soft soil conditions and both the seismic hazard and the difficult geological site conditions impose tremendous challenges to the bridge design.
This paper summarizes the engineering approach, design decisions regarding alignment and articulation, design challenges and results obtained for the detailed design of the world record bridge. The design criteria, construction conditions and structural design of the bridge are systematically introduced in this paper.