Pub Date : 2022-02-28DOI: 10.37538/0039-2383.2022.1.47.53
A. Pritykin
With help of FEM it is considering influence of structure design of cellular beams on the stress level in them. It was analyzed scheme of beams containing only regularly located circular openings, regularly located oval openings and variants of perforation with alternate oval and circular openings. All design schemes correspond to real constructions applied in structural practice. Numerical analysis is carried out with help of program complex ANSYS for simply supported beams loaded with concentrated force at midspan. Stress concentration was determined as relation of maximum equivalent stresses on Mises in region of openings to the stress level in flanges of the same sizes beams with solid web. For beams with circular and oval openings it is represented empirical relations for values of maximum stresses.
{"title":"INFLUENCE OF CONSTRUCTIVE DESIGN ON THE STRESS LEVEL IN STEEL BEAMS WITH OVAL AND CIRCULAR OPENINGS","authors":"A. Pritykin","doi":"10.37538/0039-2383.2022.1.47.53","DOIUrl":"https://doi.org/10.37538/0039-2383.2022.1.47.53","url":null,"abstract":"With help of FEM it is considering influence of structure design of cellular beams on the stress level in them. It was analyzed scheme of beams containing only regularly located circular openings, regularly located oval openings and variants of perforation with alternate oval and circular openings. All design schemes correspond to real constructions applied in structural practice. Numerical analysis is carried out with help of program complex ANSYS for simply supported beams loaded with concentrated force at midspan. Stress concentration was determined as relation of maximum equivalent stresses on Mises in region of openings to the stress level in flanges of the same sizes beams with solid web. For beams with circular and oval openings it is represented empirical relations for values of maximum stresses.","PeriodicalId":273885,"journal":{"name":"STRUCTURAL MECHANICS AND ANALYSIS OF CONSTRUCTIONS","volume":"165 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122826798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-02-28DOI: 10.37538/0039-2383.2022.1.59.65
V. V. Mishchenko
The main tasks of suspension of a heavy flexible thread are formulated in an “exact” formulation: without the use of “simplifications” characterizing the existing methods of calculating overhead wires and cables. A general solution is given to determine the actual position and gravity of the flexible thread modeling the overhead line wire, based on the results of full-scale geometric measurements. The possibility of solving “exact” problems using existing software is shown.
{"title":"APPLIED PROBLEMS OF SUSPENSION OF HEAVY FLEXIBLE THREAD IN GENERAL","authors":"V. V. Mishchenko","doi":"10.37538/0039-2383.2022.1.59.65","DOIUrl":"https://doi.org/10.37538/0039-2383.2022.1.59.65","url":null,"abstract":"The main tasks of suspension of a heavy flexible thread are formulated in an “exact” formulation: without the use of “simplifications” characterizing the existing methods of calculating overhead wires and cables. A general solution is given to determine the actual position and gravity of the flexible thread modeling the overhead line wire, based on the results of full-scale geometric measurements. The possibility of solving “exact” problems using existing software is shown.","PeriodicalId":273885,"journal":{"name":"STRUCTURAL MECHANICS AND ANALYSIS OF CONSTRUCTIONS","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114659507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-15DOI: 10.37538/0039-2383.2020.2.28.32
E. Koreneva, V. Grosman
{"title":"Analytical computation of combined constructions","authors":"E. Koreneva, V. Grosman","doi":"10.37538/0039-2383.2020.2.28.32","DOIUrl":"https://doi.org/10.37538/0039-2383.2020.2.28.32","url":null,"abstract":"","PeriodicalId":273885,"journal":{"name":"STRUCTURAL MECHANICS AND ANALYSIS OF CONSTRUCTIONS","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132982243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.37538/0039-2383.2022.6.2.7
A. P. Loktionov
Mathematical modeling and experimental study of the inverse Cauchy problem of restoring the initial parameters of the elastic line of a beam element of a building structure for given minor coefficients of the beam deflection equation are considered. With a uniform continuous absolute norm of error for measuring deflections by interpolating with a Lagrange polynomial, the distribution of deflection meters over the beam is obtained, which minimizes the error in restoring the initial parameters by the criterion of minimum of the Lebesgue function.
{"title":"RECOVERY OF THE INITIAL PARAMETERS OF THE BEAM WITH THE GIVEN JUNIOR COEFFICIENTS OF THE DEFLECTION EQUATION","authors":"A. P. Loktionov","doi":"10.37538/0039-2383.2022.6.2.7","DOIUrl":"https://doi.org/10.37538/0039-2383.2022.6.2.7","url":null,"abstract":"Mathematical modeling and experimental study of the inverse Cauchy problem of restoring the initial parameters of the elastic line of a beam element of a building structure for given minor coefficients of the beam deflection equation are considered. With a uniform continuous absolute norm of error for measuring deflections by interpolating with a Lagrange polynomial, the distribution of deflection meters over the beam is obtained, which minimizes the error in restoring the initial parameters by the criterion of minimum of the Lebesgue function.","PeriodicalId":273885,"journal":{"name":"STRUCTURAL MECHANICS AND ANALYSIS OF CONSTRUCTIONS","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124585582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.37538/0039-2383.2022.6.48.54
S. Osykov, A. Trofimov
Steel-concrete composite structures under bending moments have different deformation characteristics, which leads to interfacial slip and affects the stress-strain state of the entire structure as a whole. This paper presents an analytical expression for determining the friction capacity parameter in steel-concrete composite beam structures under various boundary conditions. The interfacial shear stress and interfacial shear force plot of such structures is shown. The contribution of the interfacial effect to the overall rigidity of the composite structure is estimated. The analytical values of the deflections are compared with the values obtained experimentally. The results of comparison show that neglecting the interfacial effect in current standards and guidelines leads to incorrect assessment of structural deformability. The proposed analytical model can be used to determine the stiffness of steel-concrete composite slabs.
{"title":"INFLUENCE OF INTERFACIAL INTERACTION TO THE STIFFNESS OF STEEL-CONCRETE COMPOSITES WITH VARIOUS BOUNDARY CONDITIONS UNDER BENDING MOMENTS","authors":"S. Osykov, A. Trofimov","doi":"10.37538/0039-2383.2022.6.48.54","DOIUrl":"https://doi.org/10.37538/0039-2383.2022.6.48.54","url":null,"abstract":"Steel-concrete composite structures under bending moments have different deformation characteristics, which leads to interfacial slip and affects the stress-strain state of the entire structure as a whole. This paper presents an analytical expression for determining the friction capacity parameter in steel-concrete composite beam structures under various boundary conditions. The interfacial shear stress and interfacial shear force plot of such structures is shown. The contribution of the interfacial effect to the overall rigidity of the composite structure is estimated. The analytical values of the deflections are compared with the values obtained experimentally. The results of comparison show that neglecting the interfacial effect in current standards and guidelines leads to incorrect assessment of structural deformability. The proposed analytical model can be used to determine the stiffness of steel-concrete composite slabs.","PeriodicalId":273885,"journal":{"name":"STRUCTURAL MECHANICS AND ANALYSIS OF CONSTRUCTIONS","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117164120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.37538/0039-2383.2022.6.40.47
O. Sabirova, G. V. Sorokina, А.М. Uzdin, M. Fedorova
The ways of combining loads in evaluating strains and other indicators of the structure operation are considered. The main attention is paid to two methods: constructing the distribution density function of the analyzed factor caused by the simultaneous action of loads and the analysis of equiprobable pairs of the considered loads. It is shown that these methods are described by different equations and lead to different results. The first way is more conservative. The ambiguity of the task of determining the load design combination is noted. The conclusions are illustrated by a simple example.
{"title":"METHODS FOR COMBINING LOADS IN THE DESIGN OF THE SEISMIC STABILITY STRUCTURES","authors":"O. Sabirova, G. V. Sorokina, А.М. Uzdin, M. Fedorova","doi":"10.37538/0039-2383.2022.6.40.47","DOIUrl":"https://doi.org/10.37538/0039-2383.2022.6.40.47","url":null,"abstract":"The ways of combining loads in evaluating strains and other indicators of the structure operation are considered. The main attention is paid to two methods: constructing the distribution density function of the analyzed factor caused by the simultaneous action of loads and the analysis of equiprobable pairs of the considered loads. It is shown that these methods are described by different equations and lead to different results. The first way is more conservative. The ambiguity of the task of determining the load design combination is noted. The conclusions are illustrated by a simple example.","PeriodicalId":273885,"journal":{"name":"STRUCTURAL MECHANICS AND ANALYSIS OF CONSTRUCTIONS","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123501517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.37538/0039-2383.2022.6.69.74
V.V. Katyushin
For individual structures and structural systems that have pronounced non-linear properties or properties that are not described or regulated by the current calculation standards, for example, for thin-walled structures; for systems with large deformations; for calculations for progressive collapse, etc., it is proposed to supplement the method of limit states, which describes structural systems in stationary states, to supplement or, in some cases, replace it with restrictions on its limiting (normalized) behavior of its elements and nodes in time and determined by the limit allowable gradients of system responses from changing external influences.
{"title":"CONCEPTS OF THE CALCULATION METHOD FOR STRUCTURES ACCORDING TO THE LIMIT (NORMALIZED) BEHAVIOR","authors":"V.V. Katyushin","doi":"10.37538/0039-2383.2022.6.69.74","DOIUrl":"https://doi.org/10.37538/0039-2383.2022.6.69.74","url":null,"abstract":"For individual structures and structural systems that have pronounced non-linear properties or properties that are not described or regulated by the current calculation standards, for example, for thin-walled structures; for systems with large deformations; for calculations for progressive collapse, etc., it is proposed to supplement the method of limit states, which describes structural systems in stationary states, to supplement or, in some cases, replace it with restrictions on its limiting (normalized) behavior of its elements and nodes in time and determined by the limit allowable gradients of system responses from changing external influences.","PeriodicalId":273885,"journal":{"name":"STRUCTURAL MECHANICS AND ANALYSIS OF CONSTRUCTIONS","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125492360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.37538/0039-2383.2022.6.55.60
A.E. Khudaynatov, A. V. Logvinov, A. Y. Ivanova, E. A. Pavlova
A comparative analysis of the design cross-sections of ceramic bricks and large-format ceramic masonry according to the EN 1996-1-1 buckling (concentrated load) calculation algorithm and Russian standards is carried out. The main differences in calculations are pointed out. Recommendations are given for refining the methodology of concentrated load calculation for masonry made of large-format ceramic block.
{"title":"SPECIFICS OF CALCULAR MASONRY LAGE-FORMAT ORGANIC BLOCK STRUCTURES CRUSHING (CONCENTRATED LOAD) ACCORDING TO RUSSIAN AND EUROPEAN STANDARTS","authors":"A.E. Khudaynatov, A. V. Logvinov, A. Y. Ivanova, E. A. Pavlova","doi":"10.37538/0039-2383.2022.6.55.60","DOIUrl":"https://doi.org/10.37538/0039-2383.2022.6.55.60","url":null,"abstract":"A comparative analysis of the design cross-sections of ceramic bricks and large-format ceramic masonry according to the EN 1996-1-1 buckling (concentrated load) calculation algorithm and Russian standards is carried out. The main differences in calculations are pointed out. Recommendations are given for refining the methodology of concentrated load calculation for masonry made of large-format ceramic block.","PeriodicalId":273885,"journal":{"name":"STRUCTURAL MECHANICS AND ANALYSIS OF CONSTRUCTIONS","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114649489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.37538/0039-2383.2022.6.61.68
S. Turkovskiy, A. Pogoreltsev, V. Stoyanov
Serial production of glued wooden structures (GWS) in Russia was organized in 1975. The structural system “TSNIISK” was created and improved since 1975. The feature of the system is the use of prefabricated GWS joints on glued rods in nodes and joints. They were applied in hundreds of large-span buildings: water parks, playpens, fertilizer terminals, sports facilities, which were designed in the Loadbearing wood structures of laboratory of TSNIISK named after V. A. Koucherenko. According to Federal Law FL No. 384 of 12/30/2009, the structures of these buildings are subject to field surveys and monitoring. The article presents systematized conclusions about the state of GWS based on the results of their examination. Characteristic defects of the GWS are delaminations along the adhesive seams and cracks along the wood. The main causes of delamination are operating conditions with low relative humidity, violations of bonding technology and design errors. The analysis of the state of the GWS allowed to form recommendations for safe operation and suggestions to the design standards.
在俄罗斯，胶合木结构(GWS)的批量生产始于1975年。“TSNIISK”结构系统是自1975年以来创建和改进的。该系统的特点是在节点和节点的粘接棒上使用预制GWS接头。它们被应用于数百个大跨度建筑:水上公园，游乐场，肥料终端，体育设施，这些都是在以V. A. Koucherenko命名的TSNIISK实验室的承重木结构中设计的。根据2009年12月30日第384号联邦法，这些建筑物的结构必须接受实地调查和监测。本文根据他们的检查结果，对GWS的状态提出了系统的结论。GWS的特征缺陷是沿粘接接缝的分层和沿木材的裂纹。造成分层的主要原因是相对湿度较低的操作条件、违反粘合技术和设计错误。通过对GWS状态的分析，提出了安全运行建议和设计标准建议。
{"title":"EXPERIENCE IN THE OPERATION OF LARGE-SPAN LAMINATED TIMBER STRUCTURES WITH TSNIISK SYSTEM NODES","authors":"S. Turkovskiy, A. Pogoreltsev, V. Stoyanov","doi":"10.37538/0039-2383.2022.6.61.68","DOIUrl":"https://doi.org/10.37538/0039-2383.2022.6.61.68","url":null,"abstract":"Serial production of glued wooden structures (GWS) in Russia was organized in 1975. The structural system “TSNIISK” was created and improved since 1975. The feature of the system is the use of prefabricated GWS joints on glued rods in nodes and joints. They were applied in hundreds of large-span buildings: water parks, playpens, fertilizer terminals, sports facilities, which were designed in the Loadbearing wood structures of laboratory of TSNIISK named after V. A. Koucherenko. According to Federal Law FL No. 384 of 12/30/2009, the structures of these buildings are subject to field surveys and monitoring. The article presents systematized conclusions about the state of GWS based on the results of their examination. Characteristic defects of the GWS are delaminations along the adhesive seams and cracks along the wood. The main causes of delamination are operating conditions with low relative humidity, violations of bonding technology and design errors. The analysis of the state of the GWS allowed to form recommendations for safe operation and suggestions to the design standards.","PeriodicalId":273885,"journal":{"name":"STRUCTURAL MECHANICS AND ANALYSIS OF CONSTRUCTIONS","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127396026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.37538/0039-2383.2022.6.28.39
I. Ivanchenko
Boundary elements for rods on an elastic base are proposed for the calculation of bridges on the HSR when moving at a variable speed of an inertial load (railway train). A set of linear and trigonometric functions is used to approximate the displacements at the construction of boundary elements. These elements are used to calculate the vibrations of the rail track outside the bridge and the track on the bridge, together with double-track girder superstructures connected through the interlayers at high-speed movement of arbitrary power and inertial loads. To construct the methodology, the step method proposed earlier by the author of the article for solving problems of unsteady dynamics of structures and the method of calculating structures for the action of mobile force and inertial loads (the method of nodal accelerations) are used.
{"title":"THE CALCULATING METHOD FOR INTERACTION OF A BRIDGE CROSSING AND A HIGHSPEED TRAIN AT VARIABLE SPEED (ELABORATING STANDARDS FOR HIGH-SPEED RAILWAYS","authors":"I. Ivanchenko","doi":"10.37538/0039-2383.2022.6.28.39","DOIUrl":"https://doi.org/10.37538/0039-2383.2022.6.28.39","url":null,"abstract":"Boundary elements for rods on an elastic base are proposed for the calculation of bridges on the HSR when moving at a variable speed of an inertial load (railway train). A set of linear and trigonometric functions is used to approximate the displacements at the construction of boundary elements. These elements are used to calculate the vibrations of the rail track outside the bridge and the track on the bridge, together with double-track girder superstructures connected through the interlayers at high-speed movement of arbitrary power and inertial loads. To construct the methodology, the step method proposed earlier by the author of the article for solving problems of unsteady dynamics of structures and the method of calculating structures for the action of mobile force and inertial loads (the method of nodal accelerations) are used.","PeriodicalId":273885,"journal":{"name":"STRUCTURAL MECHANICS AND ANALYSIS OF CONSTRUCTIONS","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126364322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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