A Seismic Demand Model for Bridges Based on IM and EDP Parameter Matching and Bidirectional Optimization

Figure 2

Linear regression model: (a) ill-conditioned model with big R2, (b) ideal model with big R2, (c) ill-conditioned model with big b and small RMSE, and (d) ideal model with big b and small RMSE.

(a)

(b)

(c)

(d)