Title: Review of Strain Rate Effects for Concrete in Tension

Author(s): L. Javier Malvar and C. Allen Ross

Publication: Materials Journal

Volume: 95

Issue: 6

Appears on pages(s): 735-739

Keywords: blast loads; concrete; dynamic loads; tension

DOI: 10.14359/418

Date: 11/1/1998

Abstract:
A literature review was conducted to determine the extant data to characterize the effects of strain rate on the tensile strength of concrete. In particular, additional new data by Ross et al. were considered. This data support the dynamic increase factor (DIF) being a bilinear function of the strain rate in a log-log plot, with no increases for strain rates below 10-6 , and with a slope change at a strain rate of 1 s-1. A DIF of about 7 was obtained at the highest reported experimental strain rate of 157 s-1. The DIF formulation recommended by the European CEB was described, together with its origins. It was found that the data differed somewhat from the CEB recommendations, mostly for strain rates beyond 1 s-1, and an alternate formulation was proposed based on the experimental data.