## 5 Conclusions  
The performances of key components in a cable-stayed bridge (deck, cable, and pylon) were evaluated via numerical analysis, and all responses for the components and damage type were examined for a range of strategically targeted blast events. The main findings of this study are as follows:  
* The study introduced an appropriate blast scenario setting method to facilitate the performance evaluations of the main components of a cable-stayed bridge under a blast load. Furthermore, a method for modeling these components was proposed, which was sensitive to the structural characteristics of such bridges. * A superstructure blast analysis was conducted in each scenario according to the blast position, and the results were examined. The results showed that the damage range of the components increased with the blast load. The damage types observed included the scabbing and perforation of the slab, as well as the deformation and fracture of the steel girder. Furthermore, the superstructure was more vulnerable to a blast above the crossbeams than between them. * A blast analysis was conducted in each scenario for cables of different diameters, lengths, and design stresses. The results showed that the maximum displacement and effective stress in each cable increased with the blast load, and no cable fractures occurred in all scenarios. The increase in effective stress (relative to the initial stress of the cable) generated by the blast load was approximately 531-1292 MPa for Cable no. 37 (which had the maximum diameter), 824-1258 MPa for Cable no. 53 (which had the minimum diameter) and 646-1095 MPa for Cable no. 68 (which had the maximum design stress). As such, the maximum stress variation was  
Figure 17: Displacement contours of the pylon: (**a**) Scenario A, (**b**) Scenario B, (**c**) Scenario C, and (**d**) Scenario D (fringe level unit: mm). observed on Cable no. 37. However, the maximum displacement and effective stress occurred on Cable no. 53, which had a minimum cable diameter. Therefore, in the case of cables, a blast near the cable with a small diameter tends to have a large impact on the behavior of the cable-stayed bridge. * For evaluating pylon characteristics, the case wherein a blast occurred on the hard shoulder was examined. The results show that the damage range of the pylon increased with the blast load, and the concrete and rebars were fractured in some scenarios. The damage and rebar yield occurred primarily in the pylon column and the upper cross beams, wherein the applied blast load was largest. The significant damage in the upper crossbeams was considered to be due to the continuous compression of the pylon. Furthermore, the maximum transverse displacement caused by the blast load was examined, and it was found to have an impact on the local behavior of the pylon for Scenarios A-C; however, for Scenario D, it was found to affect the overall behavior of the pylon, with displacements of 636.6 and 649.7 mm being observed at the top of the pylon and at the deck height in the column, respectively. Therefore, the pylon may be severely damaged under Scenario D.  
These results indicate that the blast analysis method introduced in this study will be useful for evaluating the blast load performances of the individual components of cable-stayed bridges. If a performance evaluation of the entire bridge system can be conducted alongside this method, it will become possible to conduct a detailed review of the structural performances of bridges during operation. Conceptualization, methodology, writing--review and editing, and supervision, J.L. ; methodology, formal analysis, investigation, and writing--original draft preparation, K.C. ; conceptualization and supervision, C.C. All authors have read and agreed to the published version of the manuscript.