Shvydenko A.V., Pozdieiev S.V., Kostenko T.V., Zemlianskyi O.М., Sydoruk O.V. Substanti-ation of the method for the calculated evaluation of the resistance of buildings to progressing destruction due to the fire

Details
Parent Category: Geo-Technical Mechanics, 2020
Category: Geo-Technical Mechanics, 2020, № 152

Geoteh. meh. 2020, 152, 138-148

https://doi.org/10.15407/geotm2020.152.138

SUBSTANTIATION OF THE METHOD FOR THE CALCULATED EVALUATION OF THE RESISTANCE OF BUILDINGS TO PROGRESSING DESTRUCTION DUE TO THE FIRE

1Shvydenko A.V., 1Pozdieiev S.V., 1Kostenko T.V., 1Zemlianskyi O.М., 1Sydoruk O.V.

1Cherkassy Institute of Fire Safety named after Chernobyl Heroes of NUCP of Ukraine

UDC 69.059.28:614.841.23+614.822

Language: Ukrainian

Annotation.

During the fire safety analysis of building structures besides evaluation of their fire resistance, the limits of spreading of fire, fire hazards parameters and other fire and technical characteristics, the probability of progressive collapse of building structures due to their individual elements destroying should be considered. Considering the uniqueness, massiveness and cost of reinforced concrete and other buildings structures, their natural tests are ineffective, since they contemplate manufacturing two samples of structures in compliance with all technologies. In the conditions of progressive collapse of structures, socio-economic losses are becoming the largest scale. An assessment of the possibility of progressive collapse is possible only with the use of a computational approach. This situation necessitates a calculation to assess the progressive destruction possibility of buildings and structures, which is fixed in the building codes of many countries. The article proposes a calculation method for assessing the possibility of progressive collapse, which is based on the assumption that one or more compressed elements are damaged and must be removed from the system, which ensures its rigidity and geometric constancy. The basic principle of the method is the hypothesis of the formation of a line of plastic hinges in the floor slab, which can be explained using a Bezier curve. The assessment of the possibility of progressive collapse is carried out by determination the energy criterion on the basis of comparing works of internal and external forces on possible displacements of the system, which under such conditions is geometrically variable. The proposed method is productive and economical in comparison with existing methods that involve complex mathematical models and software packages. These methods are based on standards harmonized with the relevant methodological and regulatory framework of the united Europe, and also consistent with the research results of domestic and foreign authors, which are tested, discussed and recognized by the scientific community and are included in the main base of literary references and are cited by experts in this industry.

Keywords:

progressive collapse, fire resistance limit, limit state of structural element, fire resistance class, maximum stress level, structural element, given cross section, fire wall

References

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Abouttheauthors

Shvydenko Andrii Valeriiovych, Candidate of Technical Sciences (Ph.D), Associate Professor, Head of the Department of Civil Defense Measures Cherkassy Institute of Fire Safety named after Chernobyl Heroes of National University of Civil Protection of Ukraine, Cherkassy, Ukraine. This email address is being protected from spambots. You need JavaScript enabled to view it. .

Pozdieiev Serhii Valeriiovych, Doctor of Technical Sciences (D.Sc.), Professor, Chief Researcher, Cherkassy Institute of Fire Safety named after Chernobyl Heroes of National University of Civil Protection of Ukraine, Cherkassy, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Kostenko Tetiana Viktorivna, Doctor of Technical Sciences (D.Sc.), Associate Professor, Professor of the Department of Construction Objects Safety and Labor Protection Cherkassy Institute of Fire Safety named after Chernobyl Heroes of National University of Civil Protection of Ukraine, Cherkassy, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Zemlianskyi Aleksandr Nikolaevich, Candidate of Technical Sciences (Ph.D), Associate Professor, Deputy Head of Faculty of Civil Protection, Cherkassy Institute of Fire Safety named after Chernobyl Heroes of National University of Civil Protection of Ukraine, Cherkassy, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Sidoruk Oleksandr Valeriiovych, Doctoral Student, Cherkassy Institute of Fire Safety named after Chernobyl Heroes of National University of Civil Protection of Ukraine, Cherkassy, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .