Structural Mechanics of Engineering Constructions and Buildings

Editor-in-Chief: Nikolai I. Vatin, Dr. (Technical Sciences), Professor

ISSN: 1815-5235 (Print) ISSN: 2587-8700 (Online)

Founded in 2005. Publication frequency: bimonthly publishing

Open Access: Open AccessAPC: no article processing charge

Peer-Review: double blind. Publication language: Russian, English

PUBLISHER: Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)

Journal History

Indexation: Russian Index of Science Citation, RSCI, WJCI, Google Scholar, Ulrich's Periodicals Directory, DOAJ, WorldCat, Cyberleninka, Dimensions, ResearchBib, Research4Life, Lens, JournalTOCs

 

 

The review-and-analytical and scientific-and-technical Journal "Structural Mechanics of Engineering Constructions and Buildings" acquaints the readers with the recent achievements of scientists, researchers, and engineers of the Russia and other counties. “Analysis and design of building structures”, “Dynamics of structures and buildings”, “Analytical and numerical methods of analysis of structures”, “Shell theory”, “Problems of theory of elasticity”, “Buckling analysis”, “ Geometrical investigations of middle surfaces of shells”, “Experimental researches”, “Theory of plasticity” , “Mechanics of liquids”, and “Strength of flying apparatus” are the main parts of the Journal that define the modern standards of scientific researches on building, machine-building, and architecture of space large-span structures.

The Journal is ready to widen the scope if it will receive original and topical contents.

The Journal was registered by the Federal Service of Supervision for Observance of Law in the Sphere of Mass Communications and Protection of Cultural Heritage. The Registration Certificate of mass media PI №FS77-19706 was given in April 13, 2005. The subscription index of “Rospechat” catalog is 20479 (for half of the year) and is 80344 (for full year)

Since the first January, 2007, the Journal has been included into the “List of leading peer-reviewed scientific journals” released by the Highest Attestation Commission of the Ministry of Education and Science of Russia (HAK). The results of PhD and DSc dissertations and fundamental scientific researches must be published in the journals from this “List”.
The new “List of the Journals” approved by the Ministry of Education and Science of Russia at 12.01.2015 also contains the Journal «Structural Mechanics of Engineering Constructions and Buildings».

Every issue of the Journal is sent to Russian State Library, as well as to other leading libraries, universities, educational and research institutions of the Russian Federation.

Ағымдағы шығарылым

Том 21, № 3 (2025)

Бүкіл шығарылым

Analytical and numerical methods of analysis of structures

Three-Dimensional Analysis of T-connections of Cylindrical Shells Considering Stages of Construction
Kosytsyn S., Akulich V., Osetinskii L.
Аннотация

A numerical analysis of the stress-strain state of intersecting cylindrical shells has been performed taking into account various types of nonlinearities (physical, contact, and structural). Intersecting cylindrical shells are considered as part of a large-scale three-dimensional “shell - soil” system. The study identified the most stressed areas of intersecting shells that require special attention during the modeling process. It should be noted that the particular complexity of these models lies in their high computational dimensionality since they include both the structure under consideration and its surrounding soil, which imposes additional requirements on the software packages used to solve such problems. Using modern methods of numerical analysis can significantly improve the quality of modeling and increase the accuracy of the results obtained. In particular, by considering the nonlinear properties of materials, it is possible to more accurately assess the actual behavior of shells under different external influences. In addition, the analysis shows that accounting for construction stages has a significant impact on the distribution of stresses in the intersecting shells. This underscores the need to consider the sequence of construction works, which in turn can contribute to increasing the overall reliability of the structure. Future prospects involve testing and validating the developed numerical analysis techniques on real “shell - soil” systems. The application of the obtained results to the design of load-bearing structures in real underground construction projects is also envisaged.

Structural Mechanics of Engineering Constructions and Buildings. 2025;21(3):181-190
pages 181-190 views
Numerical Simulation of Large Plastic Deformations and Free Flight of a Beam After Impact with a Rigid Stop
Shtein A., Zylev V.
Аннотация

A numerical method for analyzing fast-flowing dynamic behavior of a system of bodies during their contact interaction is investigated. The research method is based on the analysis of solution convergence when the finite element grid is condensed and the time step is reduced. The algorithm and the corresponding computer program were developed by the authors. The problem is considered in a geometrically and physically nonlinear formulation, large elastic and plastic deformations are considered. The finite element method is used. The simplest triangular finite element with a linear displacement field is used. The initial grid of finite elements is assumed to be uniform; in the process of plate deformation, it is greatly modified, since large displacements are simulated. Plane strain is considered. The criterion for the onset of plastic shear is shear stress achieving a certain limit set in the conditions of the problem. The relationship between strain and stress implemented in the program implies taking into account the strain history of the material at a given point, and not just the current value of strain. The model also allows to consider unloading, if such is the case. The calculation model is focused on the correct consideration of geometry with large displacements and rotation angles, allows consideration of free flight of the components of the model, their contact interaction. In terms of integrating the equations of motion, the program relies on an explicit calculation scheme with Adams extrapolation. The application of the described algorithm is based on the example problem of a flying short beam (plate) hitting a rigid stop. The example considers impact interaction, rebound from the stop, and free flight of the vibrating beam. The elastic and inelastic behavior of the material is compared. The wave nature of the solution is demonstrated. The example is comprehensively analyzed, in particular, convergence is investigated when the grid is doubled and the time step is reduced. The maximum number of finite elements is 204800. The numerical algorithm has a number of features: constant stress acquisition and storage for planes oriented along the fixed global axes, and the possibility of shear deformation at any of the critical planes. It is concluded that it is impossible to achieve convergence for accelerations when the grid is condensed, and it is concluded that this impossibility is not fatal for the method. As an alternative, it is proposed to determine the acceleration of the center of mass of the beam or any fragment of the model.

Structural Mechanics of Engineering Constructions and Buildings. 2025;21(3):191-206
pages 191-206 views
Seepage and Stability of an Earth Dam under the Condition of Rainfall Infiltration
Nguyen H., Pham N., Nguyen T., Ngo V., Dang V.
Аннотация

The effect of precipitation on the pore pressure of water in the soil and the stability of the slope of an earthen dam is investigated. The earth dam at Khac Khoan reservoir in Binh Phuoc province, Vietnam, was chosen as the case study. In doing so, the SEEP/W and SLOPE/W modules of the GEOSTUDIO software simulate the effects of rainfall on the changes of pore-water pressure of soil and the stability of the earth dam. Four distinct rainfall scenarios representing different intensities were used for the analyses to assess their impact on soil pore-water pressure and stability of the earth dam. The results show that rainfall induces notable changes in pore-water pressure and reduces slope stability, with the magnitude of these effects varying by scenario. Among the scenarios, the moderate-intensity, prolonged rainfall (Scenario 3) exerted the most significant destabilizing influence. Understanding how rainfall alters pore-water pressures and slope safety factors is crucial for evaluating stability under worst-case conditions and formulating appropriate operational and maintenance strategies.

Structural Mechanics of Engineering Constructions and Buildings. 2025;21(3):207-215
pages 207-215 views
Optimization of Section Parameters of Finite Stiffness Cable Under Transverse Impact
Tarasov D.
Аннотация

A cable of finite stiffness is a model for a wide range of load-bearing structures, such as large-span suspended roofs of public and industrial buildings. At the same time, a new class of engineering structures has appeared relatively recently, designed to create an insurmountable physical obstacle to unauthorized movement of vehicles. The main elements that ensure the overall strength and rigidity of such structures are ring-shaped steel sections, which resist lateral impact. In this regard, there is a need to solve problems of optimal design of these elements. The objective of this study is to create a method that allows setting and solving the designated problems. The developed method is based on single-criterion multiparameter conditional optimization, the Bubnov-Galerkin method, as well as integral and differential calculus of multivariate functions. Verification of the proposed modeling technology is carried out. Discrepancies in the values of the adopted criteria for assessing the accuracy of the obtained results stay within the permissible errors in solving engineering problems. Using the developed method, the studies were conducted and the influence of the ratio of the internal to external diameter of the ring section on the weight and size characteristics, as well as the behavior of the bending-rigid cable under the action of a short-term dynamic load was revealed.

Structural Mechanics of Engineering Constructions and Buildings. 2025;21(3):216-230
pages 216-230 views

Analysis and design of building structures

Predicting the Strength of Eccentrically Compressed Short Circular Concrete Filled Steel Tube Columns
Kondratieva T., Chepurnenko A., Yazyev B.
Аннотация

The process of predicting the load-bearing capacity of eccentrically compressed circular concrete filled steel tube (CFST) columns using machine learning algorithms is investigated. The relevance of the work is established by the need to improve the accuracy of engineering calculations in the context of increasingly complex architectural solutions. The purpose of the study is to develop and evaluate the effectiveness of intelligent models for reliable prediction of CFST column strength based on key parameters of the structure and materials. The object of the study was short, eccentrically compressed CFST columns of circular cross-section. The input parameters of the machine learning models were the outer diameter of the column section, tube wall thickness, concrete strength, yield strength of steel and relative eccentricity. The load-bearing capacity of the column was taken as the output parameter. CatBoost and Random Forest Regressor (RFR) algorithms with hyperparameter optimization using the Optuna library were used for forecasting. The quality of the models was assessed using the MAE, MSE, and MAPE metrics. As a result of the study, intelligent models were developed. The CatBoost model demonstrated better accuracy rates (MAE = 67.1; MSE = 86.2; MAPE = 0.07%) compared to RFR (MAE = 72.6; MSE = 89.7; MAPE = 0.15%). The feature importance analysis showed that the outer diameter of the column and the relative eccentricity have the greatest influence on the bearing capacity. Correlation analysis confirmed the high dependence of the output parameter on these factors. The obtained results are recommended for use in calculation modules and supporting engineering systems for design solutions of load-bearing structures.

Structural Mechanics of Engineering Constructions and Buildings. 2025;21(3):231-241
pages 231-241 views
Timber Roof Panel for Industrial Buildings: Analysis According to Bending Stiffness Condition
Shishov I., Lukina A., Lisyatnikov M., Chibrikin D.
Аннотация

Large-span roof structures allow creating spacious rooms without using intermediate supports, which is important for a flexible planning system of industrial and public buildings. Typically, such structures are made of metal or reinforced concrete trusses or arches. The object of the study is a new ridged structure of a wooden plank roof panel for industrial buildings with spans of 24 and 30 m. The width of the panel without rafter structures is 2.4 m. The connection of individual boards and elements with each other in the panel is provided by nails and bolts, which compares favorably with glued wooden structures. It is possible to assemble the structure directly on the construction site. There is no need to deliver a large-scale product to the installation site. The article provides a detailed analysis of design solutions, presents calculation methods, as a result of which it is determined that the proposed structure meets the condition of bending rigidity. A simple to manufacture and to install system is described, based on the use of wooden boards and panels, which provide the nec-essary overall stability of the structure, making it an attractive option for use in various climatic regions. The results of the studies confirm the high potential for further implementation of such technology in real design practice.

Structural Mechanics of Engineering Constructions and Buildings. 2025;21(3):242-253
pages 242-253 views

Seismic resistence

Behavior of Underground Shell Structure under Seismic Impact from Explosion
Rakhmonov B., Safarov I., Ter-Martirosyan A., Mirsayapov I., Erofeev V.
Аннотация

The study presents the results of in-situ experimental investigations on the propagation of explosive seismic waves in the ground environment and the behavior of a seismically stressed underground structure in the form of a cylindrical thin-walled shell interacting with the ground during seismic impact from underground instantaneous explosions. It was taken into account that the seismic impact of an underground explosion on an underground structure depends on many factors, especially on the physical and mechanical properties of the soil of the experimental site. The composition of the soil was obtained by drilling holes for explosives from an excavated trench for installing samples of underground structures. Ground vibrations during the explosions were recorded at two points: at the main ( N 1) observation point and at the control ( N 2). Steel samples have been selected as the objects for studying the stress-strain state of underground structures in the form of cylindrical thin-walled shells of a closed section. The kinematic parameters of ground vibration were measured using seismic detectors and an oscilloscope. Ground displacements in three mutually perpendicular directions, which do not follow a linear law, are studied. Mathematical expressions have been selected to describe each of the components of the displacement vector. It is established that the longitudinal component in the equivalent state has a smoother decreasing character. Under the impact of underground explosions, the underground structure vibrates in space in a vertical plane and in two horizontal planes, with an increase in the equivalent distance, the range of vibrations is wider than the others, and the time of action of the waves on the structure increases. The values of logarithmic decrements for each component of the displacement vector of the structure are determined.

Structural Mechanics of Engineering Constructions and Buildings. 2025;21(3):254-269
pages 254-269 views
Seismic Vulnerability of Non-Code-Compliant and Code-Compliant RC Buildings
Bohara B., Jagari S., Joshi N.
Аннотация

This study investigates the seismic vulnerability of non-code-compliant reinforced concrete (RC) buildings compared to code-based structures. The research uses linear elastic and nonlinear pushover analyses (NPA) to evaluate critical seismic performance parameters such as natural periods, mass participation, base shear, capacity curve, ductility ratio, overstrength factor, collapse mechanics, and nonlinear hysteretic damping (NHD). Structures designed following standards like NBC 205 (old), RUD 205 new, and Indian standard IS 1893 are analyzed against non-code-compliant building samples (NES1-NES6) to highlight performance gaps. The findings reveal that code-compliant buildings demonstrate significantly higher seismic resistance, greater flexibility, effective earthquake energy dissipation, higher ductility, overstrength factor, and base shear capacity. Non-code-compliant buildings often exhibit soft-story failure, with initial damage observed in the columns, highlighting their vulnerability during seismic events. Meanwhile, code-compliant RC buildings (RUD) designed with seismic principles demonstrate better seismic performance, adhering to the “strong column, weak beam” philosophy and superior strength-to-capacity ratios, higher overstrength factors, and enhanced ductility ratios, highlighting their resilience under seismic loads. The results conclude that addressing the code provisions ensures earthquake-resistant buildings with warranted ductile behavior for structural systems, enabling the achievement of the intended collapse mechanism.

Structural Mechanics of Engineering Constructions and Buildings. 2025;21(3):270-280
pages 270-280 views

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