Abstract
Strictly speaking almost all structures are subjected to loads which vary with time. Road and rail traffic, cranes, pedestrians cause loads fluctuating in time; goods, furnature, partition walls are removed and replaced which also causes varying loads. However, all these loads change rather slowly which allows to treat them quasi-statically, at most with a coefficient that counts for possible dynamic effects. Material properties are taken from static testing. On the other hand, there are loading cases lasting only a very short period of time which may be intended or may occur only accidentally. Pile driving or certain machinery can cause short loading pulses. Extraordinary short time loading can occur by blast waves due to explosions, by collisions of ships, cars, trains or air planes, by tornade born missiles, falling objects in industrial buildings or on offshore structures, by wave attack on coastal structures or by earthquake. The question arises whether the short loading- duration may affect strength and deformation behaviour of the materials involved. For demolition of concrete structures some-times explosives are used in order to bring a structure down or to comminute structural parts for the separation of the reinforcing steel and possible reuse of the concrete. In this case, the energy demand depends on the properties of the materials which may be a function of the loading rate.
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© 1985 Martinus Nijhoff Publishers, Dordrecht
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Reinhardt, H.W. (1985). Tensile Fracture of Concrete at High Rates of Loading. In: Shah, S.P. (eds) Application of Fracture Mechanics to Cementitious Composites. NATO ASI Series, vol 94. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-5121-1_20
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DOI: https://doi.org/10.1007/978-94-009-5121-1_20
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