Modern methods of building design are largely based on the creation and analysis of a 3D model of a structure in a specialized CAE complex using the finite element method. The article describes the problem of designing the junctions of crossbars and columns in the metal frame of high-rise buildings. A computational model of a flange joint is created in the form of a solid three-dimensional model in the ANSYS software package, a visual display of equivalent stress fields was obtained, and the calculation results are analyzed. The method of strength analysis of junction points of frame systems using CAE systems makes it possible to more effectively take into account many options in the design due to the system of parametric values, and also analyze in more detail the stress-strain state of the calculated structure.

Over the past decade, the number of accidents in steel-framed buildings has been decreasing thanks to advanced approaches to cause analysis. In the presented article, a brief overview of the existing common design solutions of frame joints of the rack with the crossbar is made. A finite element design model of the structure under consideration has been made in accordance with the most common design solutions based on the experience of designing construction design organizations. The analysis of the local buckling of a steel structure element, which had cases of collapse in real life, was carried out. The results of the structural analysis of the structure without the presence of any defects were assessed, and the dependence of the bearing capacity of the structure on the presence of defects and the degree of their development was presented in a graphical form. The presence of a sensitive parameter of the structure under study was determined and the direction of further research of the frame connection of the rack with the girder was determined.

in this paper, the most common types of damage to metal structures were considered. Their mathematical models were specified in Ansys. In the framework of the problem under consideration, the stress-strain state of the samples in the elastic zone and beyond is studied, i.e. beyond proportionality, in this case it is necessary to perform non-linear analysis. Nonlinear mechanical properties of the material were set in the program. As a result of the calculation, the authors obtained curves of the dependence of the maximum strain in the middle of the rack on the magnitude of the applied force. the calculation results show satisfactory convergence with the experimental results. Thus, it is possible to perform a similar assessment of the decrease in the bearing capacity of the rack for damage not studied in the full-scale experiment.

When conducting inspections of metal structures of industrial buildings, one of the most characteristic damages is revealed - corrosion. To assess the degree of serviceability and the possibility of further safe operation of a building structure or a building and structure, it is necessary to correctly assess the danger of corrosion damage and determine the possibility of further operation. To assess the strength resistance of damaged structures, it is necessary to correctly assess the danger of corrosion damage and determine the possibility of further operation. For this purpose, an experimental study of columns with simulated corrosion damage was carried out and compared with the calculation results according to regulatory recommendations.

The net shells have unlimited possibilities for creating new architectural forms. The growing number of buildings constructed using this technology indicates the prospects for the use of such structures, especially in harsh climatic conditions and remote areas. The design of reticulated shells is self-supporting and has higher bearing properties compared to other types of structures. This is due to the uniform distribution of loads on all the rods of the structure, which virtually eliminates brittle fracture. The aerodynamic shape of the reticulated shells provides the best wind flow compared to other structures, which makes them stable during destructive hurricanes and tornadoes. The authors set the task to calculate and design the connection swivel node of spatial rod constructions elements; the calculations were carried out in view of geometrical and physical nonlinearity. To that effect, the solid-state model of node was created and numerical simulation was carried out. The computer simulations of the net shells structures, the use of CAD software complexes for automation of activities on stages of design and technological preparation of production are allow to reduce the time of design development, improve the quality and reliability of the design and manufacture of elements.