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The building frame consisting of RC industrial panel-frame elements: a) plan; b) general view of the structural system; c) layout scheme slabs; d) section 1-1. 1 -industrial panel-frame element; 2 -prefabricated hollow slab; 3 -connecting element; 4 -masonry filling the opening in the panel-frame.
Source publication
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 impa...
Contexts in source publication
Context 1
... building of mass construction with a precast-monolithic reinforced concrete building frame consisting of panels-frames of industrial production and prefabricated hollow slabs which are united in a spatial structural system by filling the space in the upper parts of the girders of panels-frames and interplate joints by monolithic concrete ( fig. 1). b) general view of the structural system; c) layout scheme slabs; d) section 1-1. 1 -industrial panel-frame element; 2 -prefabricated hollow ...
Context 2
... mentioned reinforced concrete frame high-rise building made of the panel-frame industrial constructions were simulated in the following way (figure 2, a): columns and girders of panel-frame constructions were modelled by spatial universal rod finite elements; details that connect the columns of neighbour panels through the height (element 2 in fig. 1 (b)), where modelled by coupling degree of freedom along the X, Y, Z axes in the corresponding nodes of adjacent panels; hollow slabs were modelled by plate finite elements of equivalent stiffness (by deformation criterion). Node restraints on the contour of the floor and coating slab were modelled as hinges. In accordance with [2], using ...
Context 3
... a variant of protection of the considered building frame against progressive collapse, it is proposed to accept additional panel-frame constructions installed in the orthogonal direction, the column of which are connected with the considered panels through the height at least in two places ( fig. ...
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Citations
At accidental impacts caused by the sudden removal of a load-bearing element of the building frame, the stress-strain state of the sections of eccentrically compressed structural elements such as columns, pylons, braces and belts of trusses, etc. becomes more disadvantageous than their stress-strain state at the stage of normal operation. The factors that lead to such a situation are sharp increase in the eccentricities of loads attaching, slenderness of cross sections, corrosion, initial curvature and mechanical damages. In these cases, buckling scenario for the exhaustion of their bearing capacity is a possible scenario. The paper proposes an approach to the obtaining of deformation criteria for assessing the special limiting state of eccentrically compressed bar elements of reinforced concrete frames. Such an approach is based on the use of a combination of nonlinear deformation analysis and nonlinear stability analysis. Paper shows that the limiting values of deformations for the considered reinforced concrete element can be determined by the criteria of strength or buckling, depending on the ratio of the forces acting in the sections of the structural element.
