ABSTRACT
It should be noted that drj (inel) corresponds to a
drift evaluated at the ultimate level of hysteretic behaviour of the structure which may be clearly
Fj-1,d
Fj,d
Fj+1,d
higher than the level defined for the seismic design situation which the lateral forces Fj,d are considered for. Schematically, Figure 2 illustrates the structural overstrength (factor Ωs) compared to the level of seismic design situation (near the first significant yielding somewhere in the structure) when considering a diagram of the maximum response of shear force Vj versus the maximum response of interstorey drift drj.
