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  • Study of the true tensile stress-strain diagram of plain concrete with real size aggregate : Need for and design of a large Hopkinson bar bundle

Abstract

This report discusses the idea of using two specular bundles of Hopkinson's bars for the experimental observation of the instantaneous distribution of stress and strain over the cross-section of large concrete specimens with real-size aggregate, subjected to high loading rates. The true stress-strain diagram is of basic importance for the assessment of the resistance of civil engineering structures against accidental loadings such as those provoked by earthquakes and explosions. The Hopkinson bar system developed in this research is different from the normal system in two ways: the mechanical pulse is generated by the elastic energy stored in a prestressed bar, and the bar shape is a square instead of being round.

Additional information

Authors: ALBERTINI C, JRC Ispra (IT);MONTAGNANI M, JRC Ispra (IT)
Bibliographic Reference: Paper presented: EURO DYMAT 94 : International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading, Oxford (GB), September 26-30, 1994
Availability: Available from (1) as Paper EN 38587 ORA
Record Number: 199411295 / Last updated on: 1994-12-06
Category: PUBLICATION
Original language: en
Available languages: en