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Abstract

The plain concrete tensile behaviour at high loading rate is of basic importance for the assessment of civil engineering structure resistance against accidental loadings like those provoked by earthquakes and explosions. To assess the plain concrete tensile behaviour and its increased energy absorption capability under high loading rate, it is necessary to test plain concrete using a testing methodology which allows the precise study of the softening branch of the stress-strain diagram. The special equipment developed consists of input and output Hopkinson's bars subdivided into two specular bundles of elementary Hopkinson's bars. A pulse with high loading rate propagates along the bundle of the input bars, the specimen and bundle of the output bars. During the crack propagation phase each pair of specular bars of the Hopkinson's bar bundles that is individually instrumented with strain gauges, measures the loads and the displacements concerning only the portion of the specimen cross-section facing the cross-section of the pair of the bundle. By means of the Hopkinson's bar bundle it is furthermore possible to measure moment by moment: the true resisting cross-section; the true material volume under strain; the crack propagation path; the crack propagation speed.

Additional information

Authors: ALBERTINI C, JRC Ispra (IT);CADONI E, JRC Ispra (IT);FRANCOCCI P, JRC Ispra (IT);LABIBES K, JRC Ispra (IT);PETRANGELI A, JRC Ispra (IT)
Bibliographic Reference: Paper presented: Dynamic Behaviour of Concrete Structures, Kosice (SK), September 5-8, 1995
Availability: Available from (1) as Paper EN 39258 ORA
Record Number: 199511364 / Last updated on: 1995-10-31
Category: PUBLICATION
Original language: en
Available languages: en
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