115. Performance of plain and fiber reinforced concrete panels subjected to low velocity impact loading

Title: 115. Performance of plain and fiber reinforced concrete panels subjected to low velocity impact loading
Author(s): H. Xu, S. Mindess, I.J. Duca
Paper category : conference
Book title: 6th International RILEM Symposium on Fibre Reinforced Concretes
Editor(s): M. di Prisco, R. Felicetti and G.A. Plizzari
Print-ISBN: 2-912143-51-9
e-ISBN: 2912143748
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 1257 - 1268
Total Pages: 12
Nb references: 14
Language: English

Abstract: A centrally loaded round panel test was used to characterize the fracture energy of FRC under low velocity impact loading. The specimens, with a diameter of 650 mm and a thickness of 60 mm, were cast using plain high strength concrete (HSC, f'c = ~80 MPa), steel fiber reinforced HSC and a synthetic fiber reinforced HSC. These panels were subject to impact loading at their centers using a large instrumented drop-weight impact machine. The mass of the drop weight was 578 kg, with an impact velocity 1.9 m/s. Direct measurement of the central deflection at the bottom of the panel was made using a laser transducer.
No significant changes in the failure mode were observed between static and low velocity impact loading, but the peak loads under impact loading were higher. Toughness evaluations were carried out to with central deflections ranging from 30~50 mm, for both static and impact loading. The fracture toughness could be related to the fiber type and volume. It was found that under low velocity impact loading, the toughness of steel reinforced concrete (SFRC), unlike that of synthetic fiber reinforced concrete (PPNFRC), was higher than under static loading at the same central deflection. It was concluded that this test method appears to be promising for impact studies.

Online publication: 2004-08-30
Publication type : full_text
Public price (Euros): 0.00