Static and dynamic analysis of a reinforced concrete flat slab frame building for pro

[gulilero]

Static and dynamic analysis of a reinforced concrete flat slab frame building for progressive collapse

Author: Seweryn Kokot, Armelle Anthoine, Paolo Negro, George Solomos | Size: 3.9 MB | Format: PDF | Quality: Original preprint | Publisher: European Commission, Joint Research Centre, Institute for the Protection and Security of the Citizen | Year: 2010 | pages: 94 | ISBN: N.A. - PUBSY JRC 62663 - 2010

European Commission
Joint Research Centre – Institute for the Protection and Security of the Citizen
Title: Static and dynamic analysis of a reinforced concrete flat slab frame building for progressive collapse
Author(s): Seweryn Kokot, Armelle Anthoine, Paolo Negro, George Solomos
Luxembourg: Publications Office of the European Union
2010 – 94 pp. – 21.0 x 29.7 cm
Abstract
The problem of the progressive collapse of a building has been addressed using a reinforced concrete
flat slab frame. This structure was tested in the past at the ELSA laboratory to evaluate safety margins
against collapse. Static linear and nonlinear analyses of the building under column removals had first
been performed and then, in the experiment, columns had been successively removed, slowly
demolished with a crunching machine. The experiment showed that the structure survived the
demolition of two central columns, and also that structural testing against progressive collapse can be
very challenging.
Extending the scope, the dynamic nature of the loading has been considered in this report since
buildings can be exposed to fast dynamic abnormal events, such as explosions or impacts, which may
destroy abruptly load bearing elements. Thus, this study tries to answer the question of what would
have happened to this building if the columns had been destroyed dynamically. For the same
structural model dynamic linear and nonlinear analyses have been performed employing the finite
element computational framework of the SAP2000 code. Alternately, three columns, a central and two
corner ones, have been instantaneously removed and the structural response of the frame calculated.
Maximum values of bending moments and forces at critical sections are reported and compared to
those of the static analyses. Time histories of deflections of nodes above missing columns are
determined, and several ratios of response parameters resulting from the different analyses are
produced for comparison purposes. All approaches predict no mechanism which might lead to
progressive collapse, even though several hinges are formed. Advantages of the use of static or
dynamic, linear or nonlinear analyses are discussed.

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[gulilero]

Not the Report but a paper with a summary of the findings

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[subin91]

NEW Link From Post#1

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