Accuracy Assessment of Nonlinear Seismic Displacement Demand Predicted by Simplified Methods for the Plateau Range of Design Response Spectra

Figure 14

Accuracy assessment of the 3 investigated methods for soil class C with respect to the exponent of the decreasing branch after the plateau of the response spectrum. Pixel coordinates correspond to strength reduction factor values () and exponent of the decreasing branch (α). Pixels are full if the method is accurate for the corresponding couple of values (, α).