One of the major railway asset owners operates and maintains a series of steel truss bridges over major water crossings on the east coast of Australia. The bridges vary in age, from circa 1880’s to 1960’s.
As structures age and their loadings change, managing asset integrity becomes critical for the asset owners. Normally, traditional engineering methods are used for assessing a bridge’s load capacity, but these method scan sometimes be overly conservative and not cost-effective for asset owners.
To help the asset owner improve the load capacity of bridges and carry out more cost effective maintenance work, Rockfield was engaged to conduct a detailed load capacity assessment and determine the fatigue and remnant life of 13 bridges. The company used finite element modeling and combined it with field data obtained from structural health monitoring, resulting in a more accurate assessment and load rating of the bridges.