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First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address.Mironova U.V. – candidate of technical sciences, associate professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Abdrahimova N.S. – assistant E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Khaliullin А.R. – student E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Kazan State University of Architecture and Engineering The organization address: 420043, Russia, Kazan, Zelenaya st., 1
Title of the articleThe increasing resistance of the supporting system of the frameless building with a no-welding vertical joints to progressive collapse
Abstract.In the design of large-panel buildings regulatory documents are recommended to address the issues of protection of buildings against progressive collapse. The article presents the results of a numerical investigation of stress-strain state of load-carrying system of frameless multi-storey building in case of emergency impact. Reviewed the work of three types of panel joints, concrete pins, reinforced concrete pins, and a system of vertical joints «PFIFER», the analysis of their stress-strain state. It is found that when injected into the junction of the embedded parts is a redistribution of effort resulting in increased bearing capacity and reduced deformation of the joint. A disconnect joint system «PFIFER» has greater strength and less deformability. Based on this analysis, the proposed constructive solution to ensure the continuity system of large panel buildings using embedded parts of the system «PFIFER». Considered three variants of load-bearing systems no-welding joints: as initial model adopted the carrier system calculated without taking into account progressive collapse; the model was calculated considering the progressive collapse; the model using continuous reinforcement in the panels (providing continuity system in the upper and lower part of the panel introduced the ropes), calculated taking into account progressive collapse. Equal tension in the joints, located over local destruction. In case of an emergency impact on the bearing system of the building, designed according to the proposed structural solution with any possible scheme of local fracture redistribution of stresses between the elements of the joint. This leads to increased resistance of the frameless building carrier system to progressive destruction.
Keywords.large-panel housing construction, frameless buildings, emergency exposure, the strength of the vertical joints, the no-welding joints, «PFIFER», continuous reinforcement, belt stiffness, resistance to progressive collapse.
For citations:Mironova U.V., Abdrahimova N.S., Khaliullin А.R. The increasing resistance of the supporting system of the frameless building with a no-welding vertical joints to progressive collapse // Izvestiya KGASU. 2016. №4(38) P.229-235.


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