Proposal of a probabilistic model for multi-hazard risk assessment of structures in seismic zones subjected to blast for the limit state of collapse

It is desirable to verify the structural performance based on a multi-hazard approach, taking into account the critical actions the structure in question could be subjected to during its lifetime. This study presents a proposal for a probabilistic model for multi-hazard risk associated with the limit state of collapse for a reinforced concrete (RC) structure subjected to blast threats in the presence of seismic risk. The annual risk of structural collapse is calculated taking into account both the collapse caused by an earthquake event and the blast-induced progressive collapse. The blast fragility is calculated using a simulation procedure for generating possible blast configurations, and verifying the structural stability under gravity loading of the damaged structure, using a kinematic plastic limit analysis. As a case study, the blast and seismic fragilities of a generic four-storey RC building located in seismic zone are calculated and implemented in the framework of a multi-hazard procedure, leading to the evaluation of the annual risk of collapse.

[1]  David I Blockley,et al.  Vulnerability of structural systems , 2003 .

[2]  Fatemeh Jalayer,et al.  Direct probabilistic seismic analysis: Implementing non-linear dynamic assessments , 2003 .

[3]  J. Mander,et al.  Theoretical stress strain model for confined concrete , 1988 .

[4]  B. Bresler.  Design Criteria for Reinforced Columns under Axial Load and Biaxial Bending , 1960 .

[5]  D. Asprone,et al.  Probabilistic assessment of blast-induced progressive collapse in a seismic retrofitted RC structure , 2008 .

[6]  Dimitrios Vamvatsikos,et al.  Incremental dynamic analysis , 2002 .

[7]  N. Null.  Minimum Design Loads for Buildings and Other Structures , 2003 .

[8]  Liu Jie-ping,et al.  Elementary Introduction to Eurocode 8-design of structures for earthquake resistance , 2006 .

[9]  Hong Hao,et al.  Reliability Analysis of Reinforced Concrete Slabs Under Explosive Loading , 2001 .

[10]  Eric B. Williamson,et al.  Static Equivalency in Progressive Collapse Alternate Path Analysis: Reducing Conservatism While Retaining Structural Integrity , 2006 .

[11]  R. Clough,et al.  Dynamics Of Structures , 1975 .

[12]  Bruce R. Ellingwood,et al.  Approaches for Design against Progressive Collapse , 1978 .

[13]  W. R. Schriever,et al.  Progressive Collapse, Abnormal Loads, and Building Codes , 1972 .

[14]  Ross B. Corotis,et al.  Application of mathematical programming to system reliability , 1990 .

[15]  C. Meletti,et al.  Progetto S1. Proseguimento della assistenza al DPC per il completamento e la gestione della mappa di pericolosità sismica prevista dall'Ordinanza PCM 3274/2003 e progettazione di ulteriori sviluppi. Rapporto finale,del Progetto INGV-DPC S1 , 2007 .

[16]  Donald E. Grierson,et al.  Collapse Load Analysis using Linear Programming , 1971 .

[17]  Richard M. Bennett.  Formulations for probability of progressive collapse , 1988 .

[18]  Mario Locati,et al.  Convenzione INGV-DPC 2004 - 2006 / Progetto S1 Proseguimento della assistenza al DPC per il completamento e la gestione della mappa di pericolosità sismica prevista dall'Ordinanza PCM 3274 e progettazione di ulteriori sviluppi , 2007 .

[19]  Fatemeh Jalayer,et al.  Structural Modeling Uncertainty in Seismic Reliability Analysis of RC Frames: Use of Advanced Simulation Methods , 2007 .

[20]  M. Elisabeth Paté-Cornell.  Quantitative safety goals for risk management of industrial facilities , 1994 .

[21]  V. B. Watwood,et al.  Mechanism Generation for Limit Analysis of Frames , 1979 .

[22]  Bruce R. Ellingwood,et al.  Mitigating Risk from Abnormal Loads and Progressive Collapse , 2006 .

[23]  J. Moszynski.  The Dynamics of Explosion and Its Use , 1983 .