The strengthening of a 1960s three-span bridge. Externally mounted post-tensioned tendons were used to extend service life and support heavier electric metro vehicles. Ultra-high performance concrete was used to repair blisters at discrete locations without altering the bridge’s original aesthetic. Rigorous structural assessment determined the extent of departures from the AS5100 design standard, supported by parametric modelling to demonstrate the benefits of the solution.
An exemplary adaptation of 1960s engineering to meet modern transport demands while avoiding demolition. By challenging code norms and introducing ultra-high performance fibre-reinforced concrete anchorages, the team delivered a safe, efficient strengthening scheme requiring work at only four locations. This innovative approach preserved the existing bridge, minimised disruption, and enhanced capacity for metro, road, and footpath use; achieving significant material savings and delivering lasting public benefit.