The increase in the rate of global warming directly affects the safety of buildings and structures on permafrost. The research presents the problem of reliability analysis for piles on permafrost soils by the stability criterion under the action of tangential forces of frost heaving. The two groups of piles reliability analysis methods are developed: for complete and limited statistical data about random variables in the models of limit states. Approximations of the dependences of the design resistances of permafrost soils to the shear along the freezing surface on the temperature are proposed. It can be used to estimate the freezing force that keeps the pile from buckling. The method for reliability monitoring and durability forecasting has been developed for piles on permafrost soils. The proposed method makes it possible to reasonably reduce the cost of reliability analysis in the initial periods, which can increase the number of buildings and structures being inspected by the similar costs.

The article presents development of Larsen system sheet pilling new design with increased material using coefficient. The Larsen type sheet pile construction, produced at the Nizhny Tagil Metallurgical Plant is based model. As an additional element of sheet pilling, special flanges were developed, which allows increasing inertial characteristics, which made it possible to shift gravity center closer to walls, increased plastic moment of resistance, and as a result, material-using coefficient was increased. The proposed design of sheet pile has increased inertial characteristics, while maintaining rigidity of sheet pile wall. Usematerial coefficient Increased may be with utilization lighter sheet pile to hold sheet pile wall more loaded from ground and created more rigid sheet pile system.

An approach to the assessment of dynamic effects for reinforced concrete non-beam frames of structures under combined emergency actions is considered. Primary impacts imply an excess of operational loads, which causes damage to the slab-column junction from punching to the onset of a secondary impacts. Secondary impacts include considering the removal of any column from the design model over a finite time. The analysis of dynamic effects based on two approaches: the first is based on the energy method of G.A. Geniev and assumes a quasi-static assessment of the stress-strain state of the damaged system; the second is the analysis of the transient dynamic process taking into account physical and geometric nonlinearity. An approximate approach to modeling the damage of a reinforced concrete slab from punching is proposed and further prospects for its improvement are considered. The degree of danger at emergency impacts for structures pre-damaged by punching, as well as the influence of these damages on the survivability of frames under these effects, has been established. An example of assessing survivability on a model of an underground parking frame in the presence of damage from punching for one of the column-slab joints is considered.

The paper presents new design solutions for the protection of monolithic frames of multi-storey buildings with flat floors from progressive collapse. At the same time, two variants of strengthening the support zones - the zones of coupling of the plate with the column, providing the perception of peak bending moments in the event of a sudden change in the force flows of the structural system caused by the removal of one of the supporting columns, are considered: the 1st variant-reinforcement with the use of metal insert plates, the 2nd variant - reinforcement with the use of support frames with inclined reinforcing rods. Numerical studies of a fragment of the considered monolithic frame of a building according to the primary design scheme for the effect of the design load and according to the secondary design scheme for the out-of-design impact show the effectiveness of the proposed design solutions for strengthening the interface zones of flat slabs with columns to protect the monolithic frames of buildings from progressive collapse. It is established that in the considered numerical example, the steel consumption when using the option of reinforcing the support zone with frames with inclined rods, other things being equal, is reduced to 46%.

The paper obtained and analyzed the results of a numerical analysis of the survivability of a new industrial structural system of residential and public buildings that meets modern requirements for protection against progressive collapse, improved space-planning, architectural and thermal protection solutions. The presence of a significant number of enterprises with technological lines for the production of structures for large-panel housing construction and their market share, combined with a number of disadvantages of the applied technical and space-planning solutions, indicates the need to modernize these enterprises in order to produce products that meet modern requirements. The purpose of this study was to qualitatively and quantitatively study the parameters of the stress-strain state of the industrial structural system of civil buildings proposed by the authors with increased resistance to progressive collapse, the production of which would not require expensive modernization of the construction industry enterprises. On the basis of multi-level design schemes, an algorithm for calculating such a system for a special emergency effect is proposed. Numerical studies have established the compliance of the developed structural system with the requirements of a special limiting state under design loads and emergency effects caused by the sudden removal of a vertical load-bearing element.

The article is devoted to the problem of the preservation of ownerless historic manor complexes (HMK) and their restoration on the basis of commercial use in conditions of public-private partnership. On the basis of theoretical developments of recent years and studying the experience of the best practices of capitalizing the architectural heritage, possible options for the use of estate complexes were identified, a minimum list of key HMK indicators affecting future choices was formalized. Using the regulatory literature for each use case, the values and the degree of significance of key indicators are determined. Next, the method of comparing the values of the key indicators of the estates with the specified conditions for each option was adjusted using the method of multivariate analysis of variance and automated using software. The result of the work is a calculated matrix that automatically performs a multifactor analysis of the estate complex to select the most rational use of the object. The proposed method of rapid analysis allows to determine the most effective options for the modern use of each particular estate, depending on its performance. This will reduce the risks of potential investors, attract the inflow of investments into the restoration and thus contribute to the revitalization of the estates by integrating them into the сountry's infrastructure.

The modern workplace and the space in which it is located has been dynamically changing and modifying in recent years. Technological progress, in which we live and work, provides people with a lot of opportunities at the same time, but also creates challenges that must answered to them. Many have changed their workplaces so much that 20 years ago, office workers would have been hard to imagine. Freelancers and creative professionals today can work almost anywhere: in a park, in a cafe, in the subway, at home, and anywhere else where an idea comes up and an opportunity arises. The creative class, among other things, began to be highly valued, and many global brands are "hunting" for valuable personnel creating new products. For a creative professional, dynamics and variability, adaptability of space for various tasks are important. So, coworking spaces and creative spaces appeared, where free professionals could rent a table and chair for a day or a month and not be "tied" to one place for a long time, either financially or legally. Many companies and offices began to introduce creative techniques into the interior design of their spaces, make the space "flexible" and informal, create areas for communication and change of scenery, recreation, and places for brainstorming. This trend is gaining more and more interest every year and new places are being created that meet the challenges of our time. The study examines the types of creative spaces, ways of modifying traditional business spaces (offices) to create a creative atmosphere in them. On the example of the implemented project, the principles, and approaches in the design of spaces for creative specialists are clearly shown.

From time to time, mankind moves to new levels of perception of world phenomena and comprehension of the results of its activities, revealing the unity of their structural construction and existence within the general laws of the Universe. Separate sparks of speculation by scientists of antiquity, the Middle Ages and modern times about the discovered uniformity of the whole and parts (everything in everything), the universality of formulas for constructing matter from the Universe to an anthill and a molecule, were combined in the 20th century in the theory of fractals and deterministic chaos. The architecture of this hierarchy turned out to be a key link in the circle of concepts of identifying the interrelationships of all its components at different levels of subject-spatial realization: from personal space to socially organized and space systems. The projection of the categorical apparatus of the architecture of people on objects and events of the environment of various scales, on the principles of their methodological comprehension, confirmed the legitimacy of their claims to the privatization of architectural concepts as an attempt to update the approach to measuring the phenomena of the universe and, perhaps, to simplify its understanding, to understand how the whole The technological mechanism creates the universe in an infinite variety of material forms.

The presence in the newest Russian urban planning practice of special objects of professional activity - local urbanized formations is revealed. Their appearance is due to the adoption of new regulatory legal acts in various sectors of activity, significantly expanding the scope of the Urban Planning Code of the Russian Federation. They establish general requirements for the formation of territories with preferential development regimes and their subsequent use, which contain the prerequisites for significant changes in the state of territorial objects and their systems. However, to date, they are not fully used either at the stage of developing urban planning documentation, or at the stage of its implementation. Urban planning practice indicates the need to establish the relationship between the properties and characteristics of regional systems of settlements and local formations, depending on environmental factors. As a result of the analysis and systematization of modern experience in the implementation of projects for the development of local territories, the influence of the activity of their urban development on the parameters of the functioning of regional systems has been established. The revealed dependence is proposed to be used in the development of model schemes for the reorganization of regional systems, which characterize their susceptibility to the emergence of new centers of urban development. The expediency of using the developed theoretical models in the process of improving the methodology of territorial planning has been substantiated. Purposeful planning of local territories in settlement systems is presented as forecasting the emergence of new foci of development through a comprehensive assessment and consideration of the available resource potential. Thus, it ensures the regulated development of the territory. This is expressed in the achievement of the predicted parameters of changes in the state of regional settlement systems, corresponding to the conditions and requirements of their functioning. The main difference between the proposed methodology and traditional approaches lies in the simultaneous provision of the stability of the formed spatial structures and the innovation of the forms of regional systems due to the activity of local formations.

Modification of the composition and structure of heavy concrete with the use of a complex chemical-mineral additive consisting of fly ash from thermal power plants, a superplasticizer, a high-valence hardening accelerator AC and a fine-dispersed clinker component is considered. Modified concrete is characterized by an increase in compressive strength at a brand age by 67%, a decrease in the water content of a concrete mixture by 13.6% and an improvement in its workability by 11-12 cm. With the combined use of a superplasticizer and a high-valence hardening accelerator AC a significant synergistic effect is observed in the format of enhancing their plasticizing effect. The high efficiency of the application of the mixed-dispersed clinker component has been established.