Abstract
The paper presents the results of studies of the buckling of the bearing elements of the new structural system, which consists of reinforced concrete precast-monolithic panels-frames produced industrially under a special accidental impact caused by a sudden column removal from the building frame. It is established that under special accidental impact caused by a sudden column removal from RC precast-monolithic structural system consists of industrial panel-frame elements, the reason of the fracture spreading within and outside local damage (fracture) zone may be the buckling of compressed-bent elements.
Highlights
Building constructions of residential, public and industrial buildings and structures during their lifetime may be subjected to extreme or, following the terminology adopted in the new regulatory document [1], "special accidental impacts" associated with terrorist attacks, gas explosions, vehicle impact, sudden stoppage of the technological process, high temperatures, etc
The paper presents the results of numerical investigations of the buckling of the bearing elements of the new structural system, which consists of reinforced concrete precast-monolithic panels-frames produced industrially under a special accidental impact caused by a sudden column removal from the building frame
According to the results of the analysis of the spatial RC building frame model subjected the action of the design combination of loads (fig. 2 (b)) the fragment of flat building frame including the most loaded columns of the first floor was chosen for an advanced analysis of the power resistance to progressive collapse of the calculation model of the first level
Summary
Public and industrial buildings and structures during their lifetime may be subjected to extreme or, following the terminology adopted in the new regulatory document [1], "special accidental impacts" associated with terrorist attacks, gas explosions, vehicle impact, sudden stoppage of the technological process, high temperatures, etc. A number of factors, such as a decrease in the size of the cross sections due to the more wide use of concrete compressive strength classes C60 and above, a decrease in the value of the deformation modulus caused by the phenomena of primary and secondary creep [23], corrosion [24 - 27] or thermal damage [28], leads to the fact that the cause of the spread of damage within and outside the local damage zone can be the loss of stability of compressed and compressed-bent bearing elements of the structural system [29-30] In this regard, the paper presents the results of numerical investigations of the buckling of the bearing elements of the new structural system, which consists of reinforced concrete precast-monolithic panels-frames produced industrially under a special accidental impact caused by a sudden column removal from the building frame
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