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Numerical Analysis of Cable-Stayed Bridges Under Blast Loading
The excess energy released after an explosive load can lead either to a reduction in structural performance or to total collapse of the structure, which is triggered by the failure of key structural elements. On the other hand, the number of post-explosion structural collapses has recently increased. In the case of cable-stayed bridges, the different distribution of the cable stays showed different performance under conventional traffic loads. In this study, the contribution of the harp, fan and semi-fan configuration in cable-stayed bridges subjected to blast loads was investigated by means of an extended non-linear analysis. The load was modelled as a pressure function of the stand-off distance and the equivalent mass of TNT, while other parameters such as the location of the action along the bridge were varied. With this configuration, the objective was to simulate the damage induced by the dynamic effect of a high impact action, and finally, considering different magnitudes of the impact load, the collapse status of the bridge was highlighted. Good performance was demonstrated for the fan bridge, whose cable distribution improves the overall stability of the bridge.
Numerical Analysis of Cable-Stayed Bridges Under Blast Loading
The excess energy released after an explosive load can lead either to a reduction in structural performance or to total collapse of the structure, which is triggered by the failure of key structural elements. On the other hand, the number of post-explosion structural collapses has recently increased. In the case of cable-stayed bridges, the different distribution of the cable stays showed different performance under conventional traffic loads. In this study, the contribution of the harp, fan and semi-fan configuration in cable-stayed bridges subjected to blast loads was investigated by means of an extended non-linear analysis. The load was modelled as a pressure function of the stand-off distance and the equivalent mass of TNT, while other parameters such as the location of the action along the bridge were varied. With this configuration, the objective was to simulate the damage induced by the dynamic effect of a high impact action, and finally, considering different magnitudes of the impact load, the collapse status of the bridge was highlighted. Good performance was demonstrated for the fan bridge, whose cable distribution improves the overall stability of the bridge.
Numerical Analysis of Cable-Stayed Bridges Under Blast Loading
Lecture Notes in Civil Engineering
Pellegrino, Carlo (editor) / Faleschini, Flora (editor) / Zanini, Mariano Angelo (editor) / Matos, José C. (editor) / Casas, Joan R. (editor) / Strauss, Alfred (editor) / Tetougueni, Cyrille Denis (author) / Zampieri, Paolo (author) / Pellegrino, Carlo (author)
International Conference of the European Association on Quality Control of Bridges and Structures ; 2021 ; Padua, Italy
2021-12-12
9 pages
Article/Chapter (Book)
Electronic Resource
English
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