Title: Review of Static and Dynamic Properties of Steel Reinforcing Bars

Author(s): L. Javier Malvar

Publication: Materials Journal

Volume: 95

Issue: 5

Appears on pages(s): 609-616

Keywords: blast loading; dynamic loading; reinforcing bar; steel reinforcing bar; strain rate effects;

DOI: 10.14359/403

Date: 9/1/1998

Abstract:
A literature review of the effects of high strain rates on the properties of steel reinforcing bars (rebars) was conducted. Static and dynamic properties were gathered for bars satisfying ASTM A615, A15, A432, A431, and A706, with yield stresses ranging from 42 to 103 ksi (290 to 710 MPa). Strength enhancement with strain rate was expressed in the form of a dynamic increase factor (DIF) defined as the ratio of the dynamic to static yield (or ultimate) stress. It was observed that the DIF would increase for lower rebar yield stress. A simple relationship is proposed which gives the DIF (for both yield and ultimate stress) as a function of strain rate and yield stress. This relationship is of importance for the analysis of reinforced concrete structures subjected to blast or highly dynamic loads.