aii or aiii type reinforcement is beter for seismic zones

huangyhg

aii or aiii type reinforcement is beter for seismic zones?
what kind of reinforcing bars have beter responce for seismic zones?
aii   (fy= 3000 kg/cm2)
aiii  (fy=4000  kg/cm2)
check out our whitepaper library.
i think the key is to look at the ratio of yield strength to ultimate tensile strength.  aci chapter 21, section 21.2.5 provides guidelines, but your designations appear to be non-u.s. so i don't know what your steel grades are.  the general limit is to keep the ratio of actual ultimate tensile strength to actual tnesile yield strength higher than than 1.25.  this ensures good ductility in the bars.
they also require that the actual yield strength of the bars, based on mill tests, not exceed the specified yield strength by more than 18,000 psi (496 kg/cm^2)
you might check my conversion between 18,000 and 496.