Introduction. The series of recent earthquakes that have taken place on the territory of Russia has once again clearly shown that this natural disaster is characterized not only by its unpredictability, nature, and direction, but even by a significant duration, as was the case, for example, in Kamchatka in 2025. It is possible to resist the elements only with the use of reliable and proven earthquake-resistant construction constructive solutions, to these include multicommunicated systems made of precast reinforced concrete structures, among which bulk-block structures form a special group. The effectiveness of their operation significantly depends on the presence of additional damping elements in the system. The article presents an analysis of some of these solutions, which is necessary to understand how structures work during earthquakes.

Aim. To show the features of structural solutions of three-dimensional block buildings in the presence of damping elements in them in the form of friction bonds that ensure continuous energy dissipation during the entire exposure period.

Materials and methods. The analysis of existing structural solutions of three-dimensional block buildings with the inclusion of damping elements in the form of friction bonds is carried out.

Conclusions. Additional computational and experimental studies are needed to substantiate the possibilities of the considered solutions for three-dimensional block buildings with friction elements.

Introduction. The article presents differentiated studies of the stress-strain state of foundation structures of an industrial frame structure in case of emergency situations associated with the thawing of permafrost soil. The object of the study is a pile foundation with a high grillage for a frame industrial building.

Aim. Determination of the ultimate deformation values at which structural elements fail.

Materials and Methods. The research materials are computational models in the LIRA SAPR software package, which make it possible to determine probable emergency situations. The main research method is the calculation-theoretical method. It allows determining the most probable emergency situations associated with thawing of the soil base based on observations. During the study, not only the results of relative deformations were obtained, but also the structures susceptible to destruction were identified, and the redistribution of forces in the piles due to base deformation was observed.

Results and Conclusions. The results obtained showed that changes in the deformation properties of soil due to thawing, depending on the degree of thawing, affect the stress-strain state of the building foundation. The considered thawing options reflect the nature of the structure deformation and make it possible to determine the most dangerous or probable case. The results obtained can be used to form an automatic geotechnical monitoring system and establish criteria for its assessment.

Introduction. The paper compares the effectiveness of different approximation and interpolation methods for reconstructing soil property values from static sensing results in plan and depth.

Aim. The aim of the study was to evaluate the effectiveness and develop a methodology for building geostatistical models based on kriging to recover values of soil properties and to predict non-uniform settlement of foundations of high-rise buildings and structures.

Materials and methods. Uneven foundation settlement was determined on the basis of the recovered values of soil properties, taking into account the statistical heterogeneity of the soil mass using the finite element method (FEM) in the Plaxis 3D software package. Special attention was paid to geostatistical methods based on kriging, which allow a deeper analysis of geomechanical data.

Results.

1. Comparative analysis of different approximation and interpolation methods has shown that geostatistical models based on kriging, provide high accuracy when recovering soil property values at unknown points.

2. The developed methodology allowed us to build a geostatistical model of heterogeneity of soil massifs based on the results of geotechnical engineering surveys.

3. Numerical modeling in Plaxis PC confirmed the effectiveness of the proposed approach, showing that the computational model with heterogeneous soil massif built with the help of kriging accurately reproduces the real conditions than the model with constant soil parameters.

Conclusions. The use of geostatistical models based on kriging increases the accuracy of estimating the values of building settlement and roll, taking into account the heterogeneity of the soil mass.

The proposed methodology of building a geostatistical model based on kriging allows to estimate effectively the properties of the soil in plan and depth.

The results of numerical simulation of the computational model have shown that the use of spatial interpolation based on kriging to determine the values of the soil massif parameter gives results close to the data obtained with the full set of initial data.

The article presents a diagram method of calculation of reinforced concrete slabs. The considered flor slabs were subjected to intensive inflence of climatic conditions of Moscow, as a result of which they received diffrent schemes of damage. The bearing capacity of these plates varied depending on the scheme (section) of the plate damage. At the same time, concrete tests of damaged sections of structures, as well as corrosion-damaged reinforcing bars were performed. The diagrams of concrete deformation of undamaged and damaged areas and the diagrams of stretching of damaged reinforcing bars are obtained. On the basis of experimental diagrams of concrete and rebar deformation, a method of analytical determination of the bearing capacity of the plates was developed.