Multi-hazard approach represents a convenient way to address structural reliability of a critical infrastructure. Objective of the present paper is to present a multi-hazard methodology for evaluation of the risk associated with the limit state of collapse for a reinforced concrete (RC) structure subject to both seismic and blast threats. Blast fragility can be defined as the probability of progressive collapse given a blast event has taken place and its evaluation is here suggested via a Monte Carlo procedure, generating different possible blast configurations. For each blast scenario, the consequent damages occurring to the investigated structure are identified and an updating of the structure is then performed. The structural stability under gravity loading is then verified by employing a kinematic plastic limit analysis. The conditional probability of collapse or the blast fragility is then calculated as the mean value of the collapse indicator variable over the number of cases generated by the simulation procedure. Therefore, the seismic fragility is also determined via classical methods described elsewhere and the total risk of collapse is evaluated as the sum of blast and seismic contributions.

Multi-hazard risk assessment of structures subjected to seismic excitation and blast for the limit state of collapse / Asprone, Domenico; Jalayer, Fatemeh; Prota, Andrea; Manfredi, Gaetano. - 1020:1(2008), pp. 1677-1684. (Intervento presentato al convegno Seismic Engineering International Conference Commemorating the 1908 Messina and Reggio Calabria Earthquake tenutosi a Reggio Calabria nel 8-11 July 2008) [10.1063/1.2963798].

Multi-hazard risk assessment of structures subjected to seismic excitation and blast for the limit state of collapse

Asprone, Domenico;JALAYER, FATEMEH;PROTA, ANDREA;MANFREDI, GAETANO
2008

Abstract

Multi-hazard approach represents a convenient way to address structural reliability of a critical infrastructure. Objective of the present paper is to present a multi-hazard methodology for evaluation of the risk associated with the limit state of collapse for a reinforced concrete (RC) structure subject to both seismic and blast threats. Blast fragility can be defined as the probability of progressive collapse given a blast event has taken place and its evaluation is here suggested via a Monte Carlo procedure, generating different possible blast configurations. For each blast scenario, the consequent damages occurring to the investigated structure are identified and an updating of the structure is then performed. The structural stability under gravity loading is then verified by employing a kinematic plastic limit analysis. The conditional probability of collapse or the blast fragility is then calculated as the mean value of the collapse indicator variable over the number of cases generated by the simulation procedure. Therefore, the seismic fragility is also determined via classical methods described elsewhere and the total risk of collapse is evaluated as the sum of blast and seismic contributions.
2008
978-073540542-4
Multi-hazard risk assessment of structures subjected to seismic excitation and blast for the limit state of collapse / Asprone, Domenico; Jalayer, Fatemeh; Prota, Andrea; Manfredi, Gaetano. - 1020:1(2008), pp. 1677-1684. (Intervento presentato al convegno Seismic Engineering International Conference Commemorating the 1908 Messina and Reggio Calabria Earthquake tenutosi a Reggio Calabria nel 8-11 July 2008) [10.1063/1.2963798].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/656447
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