Simplified reliability analysis of punching in reinforced concrete flat slab buildings under accidental actions

Flat slab concrete buildings are widely found in infrastructure such as office and residential buildings or industrial facilities. The susceptibility of progressive collapse of such structures due to accidental loads is highly dependent on the structural performance of the slab-column connections. This paper presents a framework for a simplified reliability analysis and derivation of safety factors for computing the probability of punching of flat slab concrete buildings subjected to accidental loads such as column removal, slab falling from above or blast load. The main advantage of the proposed approach is that it considers in a simple manner, the uncertainty in the gravity load applied in the slab before the accidental event, which affects the inertial effects and demand/capacity ratio in the slab-column connections. Eurocode 2 and the Critical Shear Crack Theory for punching are used and extended to dynamic cases for the assessment of the demand/capacity ratio using computer-based time history finite element simulations. The proposed reliability method is applied to a case study of an existing building showing that the column removal situation is not always critical whereas the slab falling from above is much more detrimental.

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

[2]  Clay Naito,et al.  Blast resistant design of precast reinforced concrete walls for strategic infrastructures under uncertainty , 2015, Int. J. Crit. Infrastructures.

[3]  H. Gulvanessian,et al.  EN1990 Eurocode—Basis of structural design , 2001 .

[4]  Naoto Yoshida,et al.  Simulation of Demolition of Reinforeced Concrete Buildings by Controlled Explosion , 1992 .

[5]  C. Allin Cornell,et al.  Probabilistic Basis for 2000 SAC Federal Emergency Management Agency Steel Moment Frame Guidelines , 2002 .

[6]  Ben Gouldby,et al.  Beyond the Factor of Safety: Developing Fragility Curves to Characterize System Reliability , 2010 .

[7]  Denis Mitchell,et al.  Preventing Progressive Collapse of Slab Structures , 1984 .

[8]  Hamed Salem,et al.  Computer-Aided Assessment of Progressive Collapse of Reinforced Concrete Structures according to GSA Code , 2013 .

[9]  I. Hajirasouliha,et al.  Experimental investigation on the dynamic response of RC flat slabs after a sudden column loss , 2015 .

[10]  Aurelio Muttoni,et al.  Non-axis-symmetrical punching shear around internal columns of RC slabs without transverse reinforcement , 2011 .

[11]  Aurelio Muttoni,et al.  Punching shear strength of reinforced concrete slabs without transverse reinforcement , 2008 .

[12]  Pierluigi Olmati,et al.  Fragility analysis for the Performance-Based Design of cladding wall panels subjected to blast load , 2014 .

[13]  Osama Ahmed Mohamed,et al.  Progressive Collapse of Structures: Annotated Bibliography and Comparison of Codes and Standards , 2006 .

[14]  Luca Tassinari.  Poinçonnement non symétrique des dalles en béton armé , 2011 .

[15]  N. Pidgeon,et al.  Man-made disasters: Why technology and organizations (sometimes) fail. , 2000 .

[16]  Michele Barbato,et al.  Performance-Based Hurricane Engineering (PBHE) framework , 2013 .

[17]  David A. Nethercot,et al.  Progressive collapse of multi-storey buildings due to failed floor impact , 2009 .

[18]  Franco Bontempi,et al.  Numerical analyses for the structural assessment of steel buildings under explosions , 2013 .

[19]  P. E. Regan,et al.  Post-punching resistance of connections between flat slabs and interior columns , 1998 .

[20]  Gary F. Panariello,et al.  Study of Mitigation Strategies for Progressive Collapse of a Reinforced Concrete Commercial Building , 2006 .

[21]  Luc Taerwe,et al.  fib model code for concrete structures 2010 , 2013 .

[22]  Kai Qian,et al.  Experimental Study of Drop-Panel Effects on Response of Reinforced Concrete Flat Slabs after Loss of Corner Column , 2013 .

[23]  Giuliano Augusti,et al.  Performance-Based Wind Engineering: Towards a general procedure , 2011 .

[24]  Aurelio Muttoni,et al.  Applications of Critical Shear Crack Theory to Punching of Reinforced Concrete Slabs with Transverse Reinforcement , 2009 .

[25]  Jinrong Liu,et al.  Resistance of Flat-Plate Buildings against Progressive Collapse. II: System Response , 2015 .

[26]  Aurelio Muttoni,et al.  Assessing punching shear failure in reinforced concrete flat slabs subjected to localised impact loading , 2014 .

[27]  김태훈,et al.  Modern Protective Structures , 2012 .

[28]  Mehrdad Sasani,et al.  Compressive membrane action in progressive collapse resistance of RC flat plates , 2014 .

[29]  Seweryn Kokot,et al.  Static and dynamic analysis of a reinforced concrete flat slab frame building for progressive collapse , 2012 .

[30]  David Cormie,et al.  Blast Effects on Buildings , 2019 .

[31]  Manolis Papadrakakis,et al.  Seismic assessment of structures and lifelines , 2015 .

[32]  R. P. Johnson,et al.  General rules and rules for buildings , 2004 .

[33]  Ted Krauthammer,et al.  Energy flow in progressive collapse of steel framed buildings , 2012 .

[34]  Donald O. Dusenberry,et al.  Best Practices for Reducing the Potential for Progressive Collapse in Buildings | NIST , 2007 .

[35]  Robert E. Melchers,et al.  Life‐Cycle Performance of RC Bridges: Probabilistic Approach , 2000 .

[36]  Uwe Starossek,et al.  Disproportionate Collapse: Terminology and Procedures , 2010 .

[37]  Aly Marei Said,et al.  Resistance of Flat-Plate Buildings against Progressive Collapse. I: Modeling of Slab-Column Connections , 2015 .

[38]  Sam D. Clarke,et al.  Experimental Studies of Blast Wave Development and Target Loading from Near-Field Spherical PETN Explosive Charges , 2015 .

[39]  Aurelio Muttoni,et al.  Post-Punching Behavior of Flat Slabs , 2013 .

[40]  Trevor Kletz.  Reducing Risks, Protecting People—HSE's Decision Making Process, HSE Books, 2001, 74 pp, £5, ISBN 0 7176 2151 0 , 2003 .

[41]  Tan Kang Hai,et al.  Membrane actions of RC slabs in mitigating progressive collapse of building structures , 2013 .