Experimental studies of flange connections with gaps

Abstract

Particular interest for solving engineering problems is the question of the actual operation of the building frame as a whole, taking into account the peculiarities of the operation of joint solutions connecting the main elements. It is proposed to investigate the effect of initial gaps in flanged "beam-column" type connections on the strength and deformation characteristics of the joint solution. Particular attention is paid to the work of high-strength bolts with preload in the "tension with bending" mode of operation. In this article, the configuration of the experimental model is proposed, a method is chosen for relieving stresses in bolts through three points, which makes it possible to keeping in view stresses not only along the axis, but also in the plane of the cross-section of the bolt. Materials and methods: pre-tests and recommendations for full-scale experimental studies of a frame fragment based on the results of a numerical calculation of an equivalent model. Results: tensile testing of a bolted connection to determine the mechanical properties of bolts, taking into account the weakened section, recommendations for making changes to the full-size experimental model of the assembly, being mindful of the results of this study. Conclusions: substantiation of the methodology for conducting the experiment on the subject of the study.