Required Properties of High-Performance Steels.
Required Properties of High-Performance Steels.
(5483 K)
Galambos, T. V.; Hajjar, J. F.; Earls, C. J.; Gross, J.
L.
NISTIR 6004; 98 p. May 1997.
Available from:
National Technical Information Service
Order number: PB97-167381
Keywords:
bridges (structures); building technology; codes; design
applications; elastic design; high strength steel;
plastic design; seismic design; steels
Abstract:
This report presents the results of a study of
high-performance steels with yield stress values between
480 MPa and 609 MPa (70 ksi and 100 ksi). These
materials are a new family of constructional steels.
The impetus for the study was the need for the
determination of the applicability of these steels for
use with current structural design specifications for
buildings and bridges. The following sources were
considered in the study: the technical and scientific
literature on the development of the current design
requirements; discussion from a workshop on the topic of
the new materials; and numerical studies performed for
this project. The main conclusion from this
investigation is that the use of high-performance steels
for civil engineering structural applications is
feasible, but that considerable data obtainable from
steel mills and from further research, combined with
technical and economic studies, are needed. In
particular, experimental and finite element studies
should be performed to define the compactness properties
of sections, and the rotation capacity, as well as the
rotation requirements, of members and frames.
Sufficient statistical information on material
properties needs to be amassed so that the probabilistic
factors in the design specifications can be
re-calibrated for the high-performance steels. Special
emphasis in the required research should be placed on
the behavior of bolted connections under monotonic and
cyclic loads. The report concludes with a list of
research recommendations.
