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Vol 20, No 6 (2025)
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Architecture and urban planning. Reconstruction and refurbishment

807-814 8
Abstract

Introduction. As an example, an object of cultural heritage of federal significance is considered, which is one of the main objects forming the general appearance of the territory of the VDNH. The main purpose of the study is to analyze the results of historical, architectural and field studies of the facility, as well as to analyze data on the condition of materials and structures of the building obtained during restoration work on the facility under the supervision of the author. Description of the differences between design solutions and solutions implemented during construction.

Materials and methods. The study was conducted on the basis of work with archival information and the selection of analogues, as well as on the basis of research directly at the cultural heritage site as part of the author’s team of the restoration workshop.

Results. Conducting field studies during the production of works allowed us to introduce clarifying architectural and constructive solutions into the project. This made it possible to supplement the restoration and adaptation project, to take into account additional volumes of materials when drawing up estimates

Conclusions. When carrying out restoration work, it is extremely important to conduct scientific guidance, as well as for designers to conduct active authorial supervision, as it is not possible to perform a 100 % inspection of building structures at the stage of building inspection. The presence of hidden defects in cultural heritage sites is a constant phenomenon. The following defects were identified on the object given as an example, which affected the decision-making process.

815-821 4
Abstract

Introduction. The tactics of accelerating the pace of civilizational development of the Republic of Côte d’Ivoire through the implementation of a continuing education programme localized in integrated architectural and urban complexes of existing universities are considered.

Materials and methods. The conceptual basis of the paper is a functional and spatial synthesis of a three — phase learning system: primary general education, vocational secondary level and higher level — materialized by a complex architectural solution. Such an association is planned to be held in Ivory Coast for the first time. Therefore, the study is focused on the search and analysis of the methodology of the organization of continuing education, which has developed in other countries, and the projection of their experience on the educational system of Côte d’Ivoire.

Results. The socio-economic and ethnic circumstances, both historical and modern, are summarized. Based on the materials provided by the Ministry of Education of the Republic, a preliminary programme has been prepared for the organization of a network of educational centres for continuing education (CCE), which is now recognized as the leading one in the education and upbringing system at all age levels of students in many countries. The programme takes into account the main parameters and ethnic specifics of the contingent of trainees, the distribution of centres in the country, based on the specific needs of general and vocational education. For the first time, variants of architectural and compositional solutions of the centres are proposed, including both the main areas of study and housing, as well as infrastructure facilities that take into account the localization of complexes in the structure of cities.

Conclusions. The fundamental differences between the CCE and the planning structure and architectural solutions of existing university campuses are revealed, but the similarity of some structural elements that allow these objects to be mutually adapted is not excluded. The success of the implementation of the programme for the creation of continuing education centres in Côte d’Ivoire will make it possible to transfer the experience into the practice of neighbouring countries experiencing similar problems.

822-838 8
Abstract

Introduction. Currently, according to the new territorial development strategy, the development of the Russian Arctic in general and the development and optimization of the structure of the ports of the Northern Sea Route (NSR) in particular is one of the most important national priorities. The growing demand for infrastructure equipment for the ports of the Arctic Ocean region, the growing interest in offshore deposits in the Arctic Council countries and the need for socio-economic development of the surrounding areas require a comprehensive approach, in particular the development and implementation of a three-stage long-term development model, which includes a master plan for a settlement, an architectural and urban planning group and a standard architectural model. The objective of the study is to identify the characteristics and problems of the design of the architectural structure of the seaports of the North Sea coast in a new geopolitical phase, the development of Arctic architectural clusters based on the logistics core (seaport) and the construction of typical architectural models within the cluster based on the prevailing typology.

Materials and methods. The study is based on the application of a systematic and comprehensive approach to the design of architectural objects of seaports within the framework of clusters, an analytical analysis of documents on the spatial development of the Russian Federation for the period up to 2030 with a forecast up to 2036, an SWOT analysis of the potential of the proposed architectural and urban planning models, and analog modeling.

Results. Regional features and problems of forming the architectural structure of NSR seaports at a new historical stage are identified. Three architectural and urban planning models of Arctic clusters based on the port of the Northern Sea Route are developed. Typical architectural models within the cluster are proposed, based on the prevailing typology. A SWOT analysis of the use of the cluster approach is conducted. Weaknesses and strengths, opportunities and threats are determined.

Conclusions. The need to supplement the new Strategy for the development of the Arctic zone of the Russian Federation until 2035 is justified by the application of a three-stage long-term urban development model, which includes: a master plan for a settlement, an architectural and urban development cluster, and a standard architectural model based on the prevailing typology.

Construction system design and layout planning. Construction mechanics. Bases and foundations, underground structures

839-849 7
Abstract

Introduction. It is necessary to ensure that by 2030 the Russian Federation is among the top 25 leading countries in the world in terms of robotization density. The solution of this most important task should contribute to increasing the competitiveness of the Russian industry in the global market and accelerating the technological development of the country. Robotization has been identified as one of the directions of development of wooden house building. The condition for the introduction of automation and robotization is the creation of a continuous digital environment, starting from design, manufacturing, operation and disposal of building structures, covering all stages of the life cycle of construction products.

Materials and methods. There is an active growth of scientific papers devoted to robotics in the construction sphere.  In terms of the number of published papers Russia ranks 6th out of the total number of 61 countries considered. The efficiency of construction robotization is assessed from the point of view of economic efficiency of construction as a long-term investment process. The introduction of robotization depends to a large extent on the type of materials and production operations used. Currently, specimens of a new generation of domestic automated and robotized construction and assembly equipment are being developed and introduced into construction. Construction using wooden structures is one of the most promising areas for robotization.

Results. The experience of robot production of wooden arch coverings made of standardized calibrated solid timber bars of Japanese cypress wood with the use of single-type joints is considered. On the basis of production indicators of the operating enterprise LPC “Almas” LLC in Yakutsk the estimation of the reduction in the cost price of wooden panel constructions by 17.48 % was made when automating their production. An expert assessment of labour cost reduction in construction and installation works of large-panel buildings, as a correct analogue of a multi-storey building made of wooden CLT-panels, by 25 % in machine-shifts and man-days was carried out.

Conclusions. A prerequisite for the implementation of robotization is the creation of BIM of a high level of detail. The introduction of automation and robotization in construction with wooden structures has an effect on the stages of the factory production process and construction and assembly work.

850-866 8
Abstract

Introduction. The studies of the processes of deformation of shells are mainly carried out using computational algorithms that implement the application of various numerical methods. These algorithms must ensure obtaining accurate results and high speed of calculations, and must also be resistant to changes in input parameters (geometry, material). The purpose of this work is to develop a computational algorithm for calculating the stress-strain state (SSS) and buckling of shells, based on the application of the Ritz method and the Newton method, ensuring high productivity and stability of the solution.

Materials and methods. The deformation of shell structures is described by a geometrically nonlinear mathematical model of the Timoshenko – Reissner type, which considers transverse shears and orthotropy of the material. The mathematical model is written as a functional of the total potential energy of deformation of the shell. The study of the stress-strain state and buckling of the structure is reduced to finding the minimum of the functional. Using the Ritz method, this problem is reduced to solving a system of nonlinear algebraic equations. The solution of the resulting system is carried out using the Newton method. A distinctive feature of this algorithm is the use of an adaptive step by load when solving a system of nonlinear algebraic equations.

Results. Calculations of structures were performed: shallow shells of double curvature and cylindrical panels made of isotropic and orthotropic materials. The obtained values of critical loads have good agreement with the results of other authors: for shallow shells of double curvature, the maximum discrepancy of results was 8,05 %, and for cylindrical panels 7,29 %.

Conclusions. A computational algorithm for calculating the stress-strain state and buckling of shells that is stable to changes in geometry and material of the structure has been developed. High performance of the algorithm is ensured by using an adaptive step by load when solving a system of nonlinear algebraic equations. The possibility of using this algorithm when studying shallow shells of double curvature and cylindrical panels has been substantiated.

867-887
Abstract

Introduction. At slab-column joints, where significant force is concentrated on a relatively small area of the support, punching shear failure of the slab may occur. This type of failure is accompanied by formation of the spatial failure surface called punching cone. The main factors influencing punching shear capacity are: energetic size effect, percentage of longitudinal reinforcement in the tensile zone of the slab, span to depth ratio, column perimeter to depth ratio. Lack of consideration for these factors in a calculation method may result in low accuracy. The purpose of this work is to develop a calculation method which takes into account the main factors affecting the punching shear capacity of the slab.

Materials and methods. The paper presents a comparison of the punching shear strength obtained in laboratory tests with domestic (CP 63.13330) and foreign (Eurocode 2, ACI 318-11, Model Code 2010) building codes. It is important to develop a more accurate method for calculation of punching shear strength of a slab. Coefficients of the method can be obtained by the least squares regression analysis using Levenberg – Marquardt algorithm based on the experimental data.

Results. As a result of the regression analysis, a calculation method for punching was obtained. The comparison of the punching shear strength obtained in laboratory tests with the described method is given.

Conclusions. The comparison showed that the obtained method has a higher compliance with the experimental data than the methods presented in a number of building codes. The developed method can be used to assess the punching shear strength of slabs and foundation with and without transverse reinforcement.



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ISSN 1997-0935 (Print)
ISSN 2304-6600 (Online)