Determination of the shear bearing capacity of steel exhaust rivets for nodal joints of light steel thin-walled structures
The introduction notes the importance for the construction industry of studying the operation of exhaust rivets on the section used for nodal joints of light steel thin-walled structures (LSTC). Based on the analysis of regulatory documents, it is shown that this issue has not been fully studied. The object of research is the steel connections at the rivets. Purpose: to determine the characteristic value of the load-bearing capacity of a steel exhaust rivet in a single-cut joint. The main part presents the results of experimental and theoretical studies of the operation of exhaust rivets in thin-walled steel structures on the cut and the method for determining the strength of steel rivets on the cut. The material and technique of the experiment are described, the step-by-step process of mechanical testing is described, and the choice of a computer complex for conducting theoretical research is justified. The most typical machine diagrams “strain-load” for samples and diagrams of rivet joints with different loading speeds are shown. The dependence of the thickness of the bonded material and the bearing capacity of the joint is constructed. A geometric model of the connection is created, a deformed finite element model with isofields of equivalent Mises stresses in the limit state and a “force-displacement” diagram are presented. Based on the comparison of experimental and theoretical test results, a method for determining the shear strength of a steel rivet is proposed. The results obtained are of scientific and practical significance and can be used in the implementation of research and design work by organizations and enterprises, as well as teachers and students in educational institutions of construction profile.