Abstract
Cable-stayed bridges are infrastructure facilities of a highly public nature; therefore, it is essential to ensure operational safety and prompt response in the event of a collapse or damage, which are caused by natural and social disasters. Among social disasters, blast accidents can occur in cable-stayed bridges as a result of explosions produced by vehicle collisions or terrorist attacks; this can lead to the degradation in their structural performances and subsequent collapse. In this research, a procedure to assess structural blast-resistance performance is suggested based on a numerical analysis approach, and the feasibility of the procedure is demonstrated by performing an example assessment. The suggested procedure includes (1) selection of major structural components that severely affect the global structural behavior, (2) set-up blast hazard scenarios consisting of various blast levels and locations, and (3) assessment of the components using numerical blast simulation. By performing an example assessment, the critical blast level for each component could be determined and the blast location that affects the considering components the most severely could be found as well. The scenario-based assessment process employed in this study is expected to facilitate the evaluation of bridge structures under blasts in both existing bridges and future designs.
Highlights
Various important infrastructure facilities are currently under construction, both domestically and internationally
Blast accidents in cable-stayed bridges can occur as a result of explosions caused by vehicle collisions and terrorist attacks; these can lead to significant deterioration in their structural performance, which may cause the bridge to collapse
The performances of analysis, key components in a cable-stayed were evaluated via numerical and all responses for the bridge components damage type were evaluated via numerical analysis, and all responses for the components and damage type were examined for a range of strategically targeted blast events
Summary
Various important infrastructure facilities are currently under construction, both domestically and internationally. Disasters can be classified into natural disasters (e.g., earthquakes, typhoons, and floods) and social disasters caused by accidents (e.g., fire, collisions, explosions) and terrorist activities Among the latter category, blast accidents in cable-stayed bridges can occur as a result of explosions caused by vehicle collisions and terrorist attacks; these can lead to significant deterioration in their structural performance, which may cause the bridge to collapse. To evaluate the performance of cable-stayed bridges under different blast loads, the aforementioned studies analyzed the overall behaviors and damage characteristics of bridges by modeling either the deck and pylon only or the entire structure [14,15,16,17,18,19,20,21,22].
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