The article considers the compliance of a rigid assembly of a steel column of a typical I-section under the loads of an eccentric-compressive load with a random eccentricity. A simplified scheme of pinching a rigid hinge is considered as well as its detailed version in which the rigid part of the rod is elaborated as a basement, foundation plate, cross-arm and anchor bolts with plates. The authors carried out numerical studies of this site using a computer complex Abaqus 2017. Analysis of the results showed that the inclusion of compliance at a sufficiently accurate numerical simulation gives the same value for compressive forces. Thus, this node can be considered rigid, and the coefficient of buckling is almost equal to the theoretical value.

The article presents the variant of optimization of the project of construction of a residential complex. The study includes the decomposition of the complex into specialized types of work, the preparation of matrices of the works’ volumes, the calculation of the duration of construction, the calculation of methods of organization of work in different order, the calculations of the estimated cost of objects. A qualitative risk analysis of the project was carried out.

The article presents a statistical simulation of the deviation of the project duration from the planned value. Regression analysis was carried out - a method of statistical data processing that allows measuring the relationship between one or more causes (factor characteristics) and the consequence (effective characteristic). The end result is a curve and a correlation coefficient, which with a certain probability will allow us to predict the amount of pecuniary injury in this project.

For the calculation of building structures under the influence of external dynamic loads, it is necessary to know the eigen frequencies of the structures themselves in order to prevent such a phenomenon as resonance. Steel has distinctive properties from concrete, so its consideration is necessary to determine the eigen frequency of the whole structure. This article presents the calculation of the cantilever beam analytically and in the software package Abaqus for linear and volumetric problems with the interaction of concrete and reinforcement. Due to the reinforcement, the beam eigen frequencies differ from the eigen frequency of the conventional rigidly fixed rod, as evidenced by the results of the calculation.

The aim of the project is optimizing the parameters of deep foundation pits in order to improve their technical efficiency and economic feasibility, and development of an optimization algorithm. The analysis is carried out using the program complex PLAXIS 2D 2011. The article considers a model of the foundation pits to a depth of 5-20 m with various settings of attachment. To study the work of the soil body, the Mohr- Coulomb model is used as the simplest and strengthening soil with a small strain as the most reliable.