Moscow State University of Civil Engineering or MGSU (Russian: Московский Государственный Строительный Университет – МГСУ) is a higher education institution located in Moscow, Russia. It is located on Yaroslavsy Highway in Yaroslavsky district.The university holds the status of National Research University. The National Research Moscow State University of Civil Engineering (NRU MGSU) is the leading university of the Russian Federation in the field of construction. MGSU trains engineers, specialists and managers of all levels in the field of industrial, civil, energy, construction management, special and unique construction, information systems and technologies, designing and automation of buildings, constructions and complexes. MGSU has modern research laboratory complexes, providing studies in science and technology. The university has experience of international cooperation with scientific and educational centers from 30 countries.
This work presents a numerical investigation of mixing enhancement between two miscible fluids in a T-shaped microchannel under flow-rate modulation. Particular attention is given to the effect of anharmonic oscillations induced by oscillatory pressure drops of different frequencies applied at the channel inlets. The threedimensional Navier-Stokes equations, coupled with the convection-diffusion equation, are solved to resolve the spatial concentration field and quantify mixing efficiency. Special emphasis is placed on identifying the ranges of frequency ratios and oscillation amplitudes that yield optimal mixing performance. The results reveal that decreasing the frequency ratio produces a non-monotonic improvement in mixing, while increasing the oscillation amplitude enhances mixing only up to a critical threshold, beyond which no significant enhancement occurs. These findings provide quantitative design guidelines for microfluidic systems aiming to achieve efficient mixing, with possible implications for chemical synthesis and bioanalytical applications.
The article examines BIM technologies as a tool for the organizational and technological design of civil facilities in the Republic of Turkmenistan. The research focuses on the functions of the digital model that influence the quality of design preparation, the consistency of architectural, structural, and engineering solutions, as well as the integration of design with scheduling and resource planning. The purpose of the study is to substantiate BIM as a digital basis for managing the design and construction process at the stages of preparation, design, construction, and operation of a facility. The methodological basis includes an analysis of scientific publications on building information modeling, digitalization of the construction industry, development of organizational and technological documentation, and management of construction processes, as well as materials on the state of the construction sector in Turkmenistan. It was established that the transition to a digital scheme for developing organizational and technological documentation reduces the time required to prepare its individual elements by 28-43%, labor input by 28.6-33.3%, and the time needed for introducing changes by 50-75%. The highest intensity of BIM application occurs at the design stage and reaches 65%, while at the preparatory stage it is 51%, during construction 50%, and at the operation stage 55%. It is shown that the practical effectiveness of BIM is determined by the completeness of attributive information, data compatibility, interdisciplinary coordination, and the readiness of project participants to work in a unified digital environment. The obtained findings may be used to improve the organizational and technological design of civil facilities in the conditions of Turkmenistan.
The construction of modern buildings and structures requires careful analysis of load-bearing structures, especially monolithic slabs, which play a key role in the stability and durability of buildings, and key role in ensuring the stability and durability of buildings. Correctly specified parameters of beams and columns directly affect the deflection of slabs, which, in turn, determines the reliability of the entire structure. In the conditions of increasing number of floors and increasing loads on buildings, the relevance of research in this area becomes especially important. In this paper, the influence of beam and column cross-sections on the deflection of monolithic slabs in four-storey buildings is considered. The study was carried out using LIRA CAD software package, which allowed to obtain accurate data on the behavior of structures under different loads. The results of the work will help design engineers to optimize the parameters of load-bearing elements, providing a balance between strength and economy.
The evaluation of the effectiveness of the use of non-removable void formers in monolithic reinforced concrete slabs is based on the analysis of the results of numerical modeling of four series of samples with different dimensions in plan and the main working reinforcement. A comparative analysis of the values of compressive stresses in concrete and reinforcement, as well as tensile stresses in reinforcement for reference samples (full-bodied) and samples with non-removable void generators of the Sibform system was performed. According to the results of the study, it was revealed that the use of non-removable void formers in a monolithic reinforced concrete slab does not affect its strength, but it allows to reduce the consumption of concrete and, as a result, the weight of the structure by an average of 20
Рассматривается вопросы контактного взаимодействия и напряженнодеформированное состояние зубных коронок и имплантатов при эксплуатационных нагрузках. Задача решается методом конечных элементов в системе автоматизированного проектирования. Сходимость результатов проверяется сгущением сетки конечных элементов. Коронки состоят из нескольких материалов с характеристиками, приведенными в работе. В результате проведенного исследования определены прочностные характеристики, рассматриваемой модели коронок и имплантатов при эксплуатационных нагрузках. Полученные материалы могут быть применены в практике протезирования зубов. This paper examines the contact interaction and stress-strain behavior of dental crowns and implants under operational loads. The problem is solved using the finite element method in a computer-aided design system. The convergence of the results is verified by refining the finite element mesh. The crowns are composed of several materials with the characteristics given in the paper. The study determined the strength characteristics of the crown and implant models under operational loads. The resulting materials can be used in dental prosthetics.
