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BOSPHORUS BRIDGE SEISMIC VISCOUS DAMPER INSTALLATION

The Bosphorus Bridge is notable as one of the pioneering suspension bridges worldwide. The prevalent approach involved cross-suspension cables in this bridge category during its initial construction. However, it has been established over time that vertical suspension cables offer significantly enhanced efficiency in supporting bridge structures.

In light of this realization, a decision was made to replace the cables with a vertical configuration during the 40th Year of Maintenance for the Bosphorus Bridge. Adopting vertical cables eliminates the horizontal load exerted on the bridge, improving carrying capacity and performance.

To further enhance the bridge's resilience against seismic activity, seismic viscous dampers were strategically installed at the convergence points of the bridge deck and tower legs. These dampers effectively mitigate the potential effects of seismic forces. Nunteknik, a specialized company, successfully executed the installation process by employing platforms to lift and position the dampers, each weighing 2.5 tons, at the height of 60 meters. Remarkably, this operation was carried out while the bridge remained operational, ensuring minimal disruption to its functionality.

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