Fatigue and bond properties
Many concrete structural members are subjected to repeated fluctuating loads the magnitude of which is well below the maximum load under monotonic loading. This type of loading is typically known as fatigue loading. Contrary to static loading where sustained loads remain constant with time, fatigue loading varies with time in an arbitrary manner. Fatigue is a special case of dynamic loading in which inertia forces do not influence the stresses. Examples of structures that are subjected to fatigue loading include bridges, offshore structures and machine foundations.