PSI - Issue 18

Available online at www.sciencedirect.com Structural Int grity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com ScienceDirect

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Procedia Structural Integrity 18 (2019) 765–774

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. Abstract The recent increase number of terrorist attacks have accrued the vigilance from defense and securities organization of many countries. These entities collaborating with scientists allows providing a better insight into the structural performance of existing buildings subjected to pre-planned attacks. On the other hand, the explosive weapon is the most used methodology by the terrorists since they aimed to reach a consequent loss or damages. In this paper, the structural performance of a generic cable-stayed bridge under blast loading is assessed throughout an extensive numerical analysis. Firstly, a though non-linear analysis is performed to under the ultimate capacity of a generic cable-stayed bridge, then it was possible to simulate the damage induced by the dynamic effect of a high impact action and finally considering different magnitudes of impact load, the failure state of the bridge is highlighted. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 1. Introduction Several existing structures nowadays are facing the risk of destruction under explosions since primarily most of them were designed to satisfy the limit state under current use while extreme events have not been considered in the design. Jenkins (1997) has identified in his work no fewer than 550 attacks against existing buildings and infrastructures over the past 60 years. These figures are not about to stop there in view of the number of terrorist attacks and intimidation situations recently observed around the world. For these reasons, structures are increasingly exposed to early failure compared to their initial expected lifetime because the observed degradation of a structure depends on several parameters related to both the structure and the intensity of the event. For this reason, many scientists, 25th International Conference on Fracture and Structural Integrity Structural response of cable-stayed bridge subjected to blast load Cyrille Denis Tetougueni*, Paolo Zampieri a Dept. of Civil, Architectural and Environmental Engineering, Via Marzolo 9, 35121 Padua, Italy Abstract The recent increase number of terrorist atta ks have accrued the vi ilance from defe se and se urities organization of ma y countrie . These ntities collaborating with scientis s allows providing a bett r insight into the structural perf rmance of xist ng buildings subj cted to pre-plan ed attacks. On the oth r ha d, the explosive weapon is the ost used methodology by he terrorists si c they aimed to reach a consequent loss or damages. In this p per, the tructural perf rmance of a generic cable-stayed bri ge blast loading is ssessed throughout an extensive numerical an lysis. Firstly, a though non-linear a alysis is performed to under the ultimate capacity of a generic cable-stay d bridge, the it was possible to simulate the dam ge induc d by the dynam c effect of a high impact action and finally considering different magnitudes of impact load, the failure state of the bridge is highlighted. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. Keywords: Blast loads; Cable-stayed bridge; failure; structural performance 1. Introduction Several existing structures nowadays are facing the risk of destruction under explosions since primarily most of them were designed to satisfy the limit state under current use while extreme events have not been considered in the design. Jenkins (1997) has identified in his work no fewer than 550 attacks against existing buildings and infrastructures over the past 60 years. These figures are not about to stop there in view of the number of terrorist attacks and intimidation situations recently observed around the world. For these reasons, structures are increasingly exposed to early failure compared to their initial expected lifetime because the observed degradation of a structure depends on several parameters related to both the structure and the intensity of the event. For this reason, many scientists, 25th International Conference on Fracture and Structural Integrity Structural response of cable-stayed bridge subjected to blast load Cyrille Denis Tetougueni*, Paolo Zampieri a Dept. of Civil, Architectural and Environmental Engineering, Via Marzolo 9, 35121 Padua, Italy Keywords: Blast loads; Cable-stayed bridge; failure; structural performance

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. * Correspon ing author. T l.: +39-049-5842875570; fax: +39-049-5842875570. E-mail address: cyrille.tetougueni@dicea.unipd.it * Corresponding author. Tel.: +39-049-5842875570; fax: +39-049-5842875570. E-mail address: cyrille.tetougueni@dicea.unipd.it

2452-3216  2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 10.1016/j.prostr.2019.08.225