Novosibirsk State University of Architecture and Civil Engineering

A rapid urban development and interaction with natural systems, disrupt the balance between anthropogenic and natural systems. The chronology of the development of engineering landscaping in Western Siberia cities makes it possible to create a database on territories and determine the dependence between functional and aesthetic qualities of the environment. Purpose : Identification of the main development stages of engineering services and equipment of cities in Western Siberia (Biysk, Tomsk, Omsk). Correlation between the development chronology and identification of characteristics of the formation of urban areas and their infrastructures. Methodology : Integrated and analytical approaches, systematization of archival documents and cartographic materials. Research findings : The main directions of the urban development in the period from the 1930s to present days are identified. The general evolution of engineering landscaping and its main development stages are determined.

This work is a systematic review of studies in the field of viscosity and rheology of drilling fluids modified with nanoparticles, based on results obtained over approximately the past 10 years. The viscosity and rheology of more than 40 different drilling fluids with silicon, aluminum, and titanium oxide nanoparticles and with diamond nanoparticles are studied. The mass concentration of nanoparticles varies from 0.06 to 4%, and their size ranges from 5 to 190 nm. Nanofluids are highly specific dispersed liquids; their properties are not described by classical theories for coarse-dispersed fluids. The presence of nanoparticles in drilling fluids, which have a much more complex structure than nanofluids, leads to extremely interesting and novel effects, which are also discussed in this paper.

The article is devoted to the urgent problem of protecting buildings and structures from dynamic influences of various nature and origin. An effective means of vibration suppression is being considered namely dynamic vibration dampers. A generalized model of a system of multi-mass dampers and a rational, engineering-oriented method for calculating their parameters at conditions of polyharmonic descriptions of complex dynamic excitations on construction objects are proposed, using the concepts and methods of the theory of regulating the stress-strain state of structures, where dampers play the role of regulators. Based on the decomposition approach, an analytical solution to the problem of determining the parameters of a complex of dampers according to pre-formulated requirements for the results of regulating the dynamic state of a deformable system (buildings, structures) is obtained. The test tasks were used to evaluate and analyze the accuracy of the results of calculations of model systems according to the developed methods, algorithms and formulas.

Statement of the problem. An analysis and generalization of experimental data using methods of one-factor and two-factor analysis of variance is performed. The purpose of the study is to establish the defining relationships between factor variables and their quantitative analogues presented in the form of «responses» as well as to demonstrate the process of statistical changes in information parameters when using various methods of analysis of variance. Results.Information is summarized on the results of mathematical modeling of the parameters of information models that have different classifications and distinctive features depending on the types of documents used on them to regulate the processes of building information models. Null hypotheses are proposed, their refutation and proof are carried out using a statistical sample of experimental data obtained as a result of projects based on building information modeling technology. To conduct a visual analysis, tabular calculation results and graphical presentation of data in the form of scatter diagrams were used. Conclusions. It has been suggested that it is necessary to introduce a virtual passport of a capital construction project at the earliest stages of the project in order to reduce the risk of data loss in the process of changing the life cycle of the facility. It is proposed to reduce the overall project error by introducing a virtual passport and a project implementation plan into the interaction process in order to ensure consistency of data and information components.

The Discover Architecture Workshop for high school students is a summer program that allows career exploration of professions within the building arts.In the week long program, students

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The article summarizes the methodological approach and the results of normalizing the working conditions of workers of one of the coal mining transport companies.The growth rate of the single capacity of mining transportation equipment, its productivity and the intensity of mining determine the growth of technical risks, which are characterized by an increase in the direct or indirect influence of natural, mining, geological, technical, technological and organizational factors.As a result, the risk of equipment failure and personal injury increases significantly.The author considers the normalization of working conditions of workers in production processes as one of the important tasks of ensuring the safety and efficiency of production at the site, in the service, at the enterprise and in the company.The article is open to question.

The article deals with the problem of rational design of a nonlinearly deformable heterogeneous composite Timoshenko rod under force impact. The rod has a structure that is symmetrical relative to the force plane, formed by the connection of quasi-homogeneous parts (phases, layers) with different physical properties, taking any geometric shape in space. The structural materials that form the rod have nonlinear elastic properties. To describe the main component of the stress tensor – the normal stress in the longitudinal direction – in each phase, the same type of approximation by entire rational polynomials is taken depending on the deformation. On their basis, compact nonlinear equations were obtained that connect integral forces with generalized deformations of the axial line of the rod. In this system, the rigidity characteristics of higher exponent are figured as coefficients. Nonlinear equilibrium conditions written for the case of large displacements and rotation angles in combination with linear kinematic relations are resolved in the form of the initial parameter method. Based on the strength condition written in the form of a quasi-uniaxial criterion, the designing criterion is formulated for the heterogeneous rod. This criterion is continuous along the longitudinal coordinates and it is discrete along the transverse coordinates. A two-stage algorithm is developed to solve the design problem of the rational design of a nonlinearly deformable layered rod. It makes it possible to identify the geometric functions of the longitudinal profiling of the rod layers presented in a discrete form. Resolution relations were obtained to find the functions of the width and height of the profiled layers. Numerical results are presented to solve the design problem of calculating a compressed-bent I-section rod, in which the flanges and I-beam webs were made of various materials. The presence of geometric restrictions on variable values from below ensured non-degeneracy of the flanges at the pre-support areas. The three characteristic areas were detected in the rod with the implementation of the calculated continuous criterion in the form of two-, one- and zero-point conditions along the transverse coordinate. It is shown that the consideration of the shear stresses in the rod of this flexibility is not relevant.

The article discusses the possibility of obtaining biopositive, energy-efficient building materials using local raw materials and waste with a given set of performance properties. The influence of the microstructure of organic fillers on the properties of materials was studied and criteria for the use of a combined multicomponent organic filler were determined. Test results and multifactor analysis are presented; it is determined that the use of polyfractional plant filler can improve the strength characteristics of the material. The mechanisms of formation of the adhesive shell of polystyrene foam granules have been studied. The efficiency of modification of aqueous dispersions of dimethyl ketone and carboxylic acid derivatives with nanosized additives was studied using thermodynamic curves. Physico-chemical processes and structure formation in the composite material have been studied.

It has been found that heat release in a homogenized composite model is described by the Joule–Lenz law for the averaged current strength and voltage. It has been shown that the local electric field strength and the local electric current in a real composite are usually significantly different from those in the homogenized model despite the fact that the electric field potentials in the homogenized model and the real composite are close.