*2.1. Target Structure*

**.**

To analyze the performances of the major components of a cable-stayed bridge under a blast load, we selected the target bridge as shown in Figure 2; it is a cable-stayed bridge featuring three spans, with a main span length of 470 m and a side span length of 200 m. It is a composite superstructure formed of precast reinforced concrete (RC) slabs and steel girders (edge girder, center stringer, and crossbeam). The deck is 310 mm thick near the pylon and 260 mm thick in other sections, and it is made of 68 standard segments (length (L) = 12.3 m). In addition, the bridge features 144 cables of varying areas and lengths and two RC pylons (PY1 and PY2), which contain hollow sections. To evaluate each component of the cable-stayed bridge, a single 260-mm thick segment at the center of the span was selected from the superstructure. We selected the following cables for analysis: Cable no. 37 (area (A) = 0.012450 m<sup>2</sup> , L = 252 m), which is the longest cable, has the largest cross-sectional area, and extends to the mid-point of the superstructure; Cable no. 53 (A = 0.005185 m<sup>2</sup> , L = 81 m), which has the smallest cross-sectional area; and Cable no. 68 (A = 0.009385 m<sup>2</sup> , L = 206 m), which is attached to the side span, where the largest stress is applied. We selected PY2 as the pylon; its base segment (CB1 in the figure) is 2.37 m taller than that of PY1.

**Figure 2.** Target bridge components.

Tables 1 and 2 summarize the specifications of the steel girders and rebars comprising each component; these values were taken from [23].

**)** 


**Table 1.** Steel girder details.

