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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.Agafonkin V.S. – candidate of technical sciences, associate professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Isaeva L.A. – candidate of technical sciences, associate professor 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, Zelenaia st., 1
Title of the articleNew designs of semi-rigid nodes frame structure and features of their work
Abstract.The article investigates the work of joints elements of steel framework. The analysis of constructive solutions of joints of crossbars with columns is made. Assessed the impact and accounting the features of constructive decisions in calculations of determining the stress-strain state. It is noted that one of the most important tasks is regulation and alignment of the span and reference points in the cross-bars of steel frames to reduce their metal content. The authors sought to develop new projects of nodal connections that meet the requirements of regulation and leveling moments on the supports and in spans crossbars in steel frames. Most of the task match semi nodal connections that are able to perceive the bending moment on a support, but with an extra turn or linear displacement. Presented the classification of frames units at the joint of angular and linear displacement. Considered the most commonly used semi-rigid nodes and assemblies feature of their work. Proposed new projects of semi-rigid assemblies that allows to realize the regulation and alignment of the moments in their work in the elastic stage. As an example, considered the work of a semi-rigid connection crossbars with column with vertical ribs. A method for evaluation of pliability units due to elastic or elastic-plastic deformations of the transverse edges of the lateral force is offered. Assessing the impact of the shift to the angular displacement of crossbars. Determining the ratio between the length of the vertical edges and height to provide a bending moment on a support. It is found that the necessary pliability node can be reached only when the rib in the elastic-plastic stage.
Keywords.steel structures, semi-rigid nodes, angular and linear movement, deflection stem, shear displacement.
For citations:Agafonkin V.S., Isaeva L.A. New designs of semi-rigid nodes frame structure and features of their work // Izvestiya KGASU. 2015. №2(32) P.130-136.


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