Mechanical
and low-cycle fatigue behavior of stainless reinforcing
steel for
earthquake engineering applications
Yihui Zhou1,
Yu-Chen Ou2,
George C. Lee3
and Jerome S. O¡¯Connor4
1.
Department of Civil, Structural and Environmental Engineering,
University at Buffalo, Buffalo, NY, U.S.A.
2.
Department of Construction Engineering, Taiwan University of Science and
Technology, Taipei, Chinese Taiwan
3.
Department of Civil, Structural and Environmental Engineering,
University at Buffalo, Buffalo, NY, U.S.A.
4.
Transportation Research, MCEER, University at Buffalo, Buffalo, NY,
U.S.A.
Abstract:
Use of stainless reinforcing steel (SRS) in reinforced concrete (RC)
structures is a promising solution to
corrosion
issues. However, for SRS to be used in seismic applications, several
mechanical properties need to be investigated.
These include
specified and actual yield strengths, tensile strengths, uniform
elongations and low-cycle fatigue behavior.
Three types of
SRSs (Talley S24100, Talley 316LN and Talley 2205) were tested and the
results are reported in this paper.
They were
compared with the properties of A706 carbon reinforcing steel (RS),
which is typical for seismic applications, and
MMFX II, which
is a high strength, corrosion resistant RS. Low-cycle fatigue tests of
the RS coupons were conducted under
strain control
with constant amplitude to obtain strain life models of the steels. Test
results show that the SRSs have slightly
lower moduli
of elasticity, higher uniform elongations before necking, and better
low-cycle fatigue performance than A706
and MMFX II.
All five types of RSs tested satisfy the requirements of the ACI 318 code
on the lower limit of the tensile to
yield strength
ratio. Except Talley 2205, the other four types of RSs investigated meet
the ACI 318 requirement that the actual
yield strength
does not exceed the specified yield strength by more than 18 ksi (124 MPa).
Among the three types of SRSs
tested, Talley
S24100 possesses the highest uniform elongation before necking, and the
best low-cycle fatigue performance.
Keywords:
Stainless reinforcing steel; low-cycle fatigue; seismic applications;
corrosion resistance
