Superstructure, which consists of beams and slabs, etc., is the span that directly supports live loads. On the other hand, substructure, which consists of piers and abutments, etc., supports the entire bridge structure and loads on the underground footings. Their long-term deterioration due to external loadings in the service environment is vastly reported as regards fatigue damage with crack propagation in concrete slabs and pier scours due to heavy rains and floods [2,3]. Damage in slabs is mostly found in highway (motorway) superstructures, while pier scouring is naturally recognized as the main cause of damage and failure of bridges over waterways. In steel–concrete composite decks, the often-occurring damage type is fatigue damage due to numerously repeating traffic overloads [4,5]. The final form of this damage is well-known as large horizontal cracks in steel–concrete composite slabs [5]. As it is difficult to visually (by visual inspections) detect internal damage, which potentially affects structural performance [6], it becomes a very serious problem for highway-reinforced concrete (RC) structures [7].