Based on equilibrium and compatibility conditions, as well as a soften
ed stress-strain relationship for normal strength concrete, a truss mo
del theory was derived to predict the strength and behavior of low-ris
e reinforced-concrete-framed shear walls. A new softened stress-strain
relationship was recently proposed for normal and high-strength concr
ete. Both the softening models of concrete are based on the shear pane
ls under static loads. The purpose of this paper is twofold: (1) to ex
amine the applicability of both the softening models to low-rise frame
d shear walls; (2) to determine the effect of dynamic shear forces wit
h low frequency (0.2 Hz) on the behavior of such walls.