ABSTRACT Experimental analysis of reinforced shear-wall with glass-fiber reinforced polymer (GFRP) showed its applicability in resisting lateral loads with no strength degradation, acceptable deformation capacity and energy dissipation as illustrated in an earlier article by the authors. The observed performance of GFRP-reinforced shear walls strongly suggested the necessity of proposing design procedure for such lateral resisting member. To propose design guidelines, however, determination of the elastic