Bridge maintenance and safety: A practicioner's view
C. Seim is one hell of a guy. :) His paper (talk?) talked about how bridge maintenance progresses from analyses on primary effects (static loading, force balance, material properties, etc.; all that is incorporated into bridge design); to secondary effects (dynamic loading properties, time-dependent [finite element] analysis of the members; towards tertiary effects (material behavior to temperature, resistance to corrosion, bearing durability, the list goes on)
I have not listed any references, as these are my thoughts alone, based on my own experiences.
That's one smug remarks from him, he deserved it.