Bridge over Reedy Creek
Bridge Engineering, Load Ratings
The Department of Infrastructure and Transport – South Australia engaged Civil Structures Studio (CSS) to undertake a load rating assessment of the Bridge over Reedy Creek, near Palmer
The Bridge over Reedy Creek is a 45m, 2 span pre-tensioned concrete bridge constructed in 1987, incorporating element of both pre-tensioned precast girders with additional post tensioning and in-situ decking. The project involved reviewing the design documentation and undertaking a load rating in line with AS5100.7 for various design rating vehicles provided by the department.
Innovations / Efficiencies:
CSS undertook detailed structural analysis modelling using MIDAS, incorporating time history load case build up to accurately account for the effects of the complex construction staging and long-term effects over the life of the bridge. Several design vehicles were tested analytically with detailed calculations and final rating factors presented to the department.
Outcomes / Benefits:
The CSS technical report provided the department with confidence that the bridge is still in useable condition for the various design rating vehicles that were not part of the original design. CSS also produced detailed load rating tables and distribution factors that could be used by the department for future load ratings if needed.
Sustainability:
By using advanced analytical methods, CSS was able to determine that the bridge was indeed safe for the increased loading of modern design vehicles which led to no major construction works being required, eliminating the need for carbon intensive interventions.
