Strengthening of Structural Members

In 1994, cracks were discovered in the concrete corbelled pier caps of the Muza line steel girder viaduct. The emergency repair scheme consisted of placing external Ø36 mm DYWIDAG Bar Tendons (THREADBAR^®) on both sides of the pier cap.

The Double Corrosion Protected (DCP) Bar Tendons were anchored in steel grillages at each end of the caps. The exposed steel parts of the grillages were protected by a three coat paint system. Permanent load cells were installed at selected tendons to monitor prestressing forces.