**2. Bridge Analysis Model**

The bridge model takes the middle bridge section of the Jinjiang Interchange of Lipan Highway as an example. The schematic plan is shown in Figure 1. The curved ramp bridge has two joints, four spans, and three expansion gap joints, and the width of expansion joint is 50 mm. In order to analyze the collision of the curved bridge during anearthquake, three expansion joints in the original bridge are retained and abutments are set at both ends. In the figure, the first span is between the right abutment and the pier 1 , and the second, third, and fourth spans are from the pier 1 to the left abutment in turn. The span length of the first, second, and third spans is 18.33 m, respectively, and the length of the fourth span is 26.18 m. The radius of the curvature of the curved bridge is 50 m.The constraint conditions of the bridge support are shown in Figure 1, and the original structure of the bridge uses ordinary rectangular plate rubber bearings. The superstructure of the bridge uses cast-in-placereinforced concrete box girders, and the substructure piers are double-columnreinforced concrete round piers with a height of 20 m. The specific sections are shown in Figure 2.

**Figure 1.** Plan of the curved bridge (unit: m).

**Figure 2.** Cross-sectional dimensions of curved bridge (unit: mm). (**a**) Transverse profile. (**b**) Longitudinal elevation.
