Pub Date : 2023-11-15DOI: 10.36622/vstu.2023.60.4.004
A.S. Alexandrov, G. V. Dolgikh, A.S. Prolygin
Statement of the problem. The normative method for calculating the pavement of a road with low traffic intensity is based on two strength criteria which include checking the thickness of the pavement according to the general modulus of deformation and accumulated residual deformation of the surface of the coa-ting. Both calculation criteria assume the use of linear dependencies linking the precipitation with the pressure. It is known that the linear dependence of the precipitation on the pressure is possible only when the load does not exceed the first critical load of N. M. Gersevanov, at which a limiting state occurs at the most dangerous point of the soil mass according to the Mohr-Coulomb criterion. Thus, the necessity of calculating the pavement by shear resistance has been established. This implies the relevance of the work aimed at determining the adhesion and the angle of internal friction for materials and industrial waste that are not controlled by the regulatory documents of the Russian Federation. Results. The parameters of the limiting Coulomb straight line (coupling and angle of internal friction) of the gravel mix compacted to the requirements for the structural layers of road paving were determined. In solving this problem, the justification for the application of triaxial tests according to the consolidated untrained (CN) test scheme was carried out. The method of ramming a cylindrical sample in a small device of standard sealing equipped with two extension nozzles has been developed. The statistical processing of the test results was carried out and the calculated values of the adhesion and the angle of internal friction of the gravel mixture were established at a humidity of 0.72 of the moisture content of the loamy soil binding crushed stone at the yield boundary. Conclusions. The results make it possible to more reasonably calculate the thickness of the structural layer of a dirt-gravel mix of lower-type road clothes for roads with a low traffic intensity. The results of the work were implemented by designing lower-type road clothes for pilot construction in the conditions of the II, III and IV road-climatic zones of the Omsk region.
问题陈述。计算低交通强度道路路面的规范方法基于两个强度标准，包括根据一般变形模量和路面表面累积残余变形检查路面厚度。这两种计算标准都假定降水量与压力之间存在线性关系。众所周知，降水量与压力的线性关系只有在荷载不超过 N. M. Gersevanov 的第一临界荷载时才有可能，根据莫尔-库仑准则，在第一临界荷载时，土体最危险点会出现极限状态。因此，根据抗剪性能计算路面的必要性已经确定。这意味着旨在确定不受俄罗斯联邦法规文件控制的材料和工业废料的附着力和内摩擦角的工作具有现实意义。研究结果确定了按照道路铺设结构层要求压实的碎石混合料的极限库仑直线参数（耦合和内摩擦角）。在解决这一问题的过程中，对根据加固非训练（CN）试验方案进行三轴试验的应用进行了论证。开发了一种方法，将圆柱形试样放入配备两个延伸喷嘴的小型标准密封装置中进行冲压。对试验结果进行了统计处理，并确定了砾石混合物在湿度为 0.72 的黄土湿度下的附着力和内摩擦角。得出结论。研究结果使我们能够更合理地计算交通强度较低道路的下层路面土碎石混合料结构层厚度。在鄂木斯克州第二、第三和第四公路气候区的条件下，通过设计试验性施工的下层公路路衣，实现了工作成果。
{"title":"Shear Resistance of Gravel Materials for Structural Layers of Road Clothes","authors":"A.S. Alexandrov, G. V. Dolgikh, A.S. Prolygin","doi":"10.36622/vstu.2023.60.4.004","DOIUrl":"https://doi.org/10.36622/vstu.2023.60.4.004","url":null,"abstract":"Statement of the problem. The normative method for calculating the pavement of a road with low traffic intensity is based on two strength criteria which include checking the thickness of the pavement according to the general modulus of deformation and accumulated residual deformation of the surface of the coa-ting. Both calculation criteria assume the use of linear dependencies linking the precipitation with the pressure. It is known that the linear dependence of the precipitation on the pressure is possible only when the load does not exceed the first critical load of N. M. Gersevanov, at which a limiting state occurs at the most dangerous point of the soil mass according to the Mohr-Coulomb criterion. Thus, the necessity of calculating the pavement by shear resistance has been established. This implies the relevance of the work aimed at determining the adhesion and the angle of internal friction for materials and industrial waste that are not controlled by the regulatory documents of the Russian Federation. Results. The parameters of the limiting Coulomb straight line (coupling and angle of internal friction) of the gravel mix compacted to the requirements for the structural layers of road paving were determined. In solving this problem, the justification for the application of triaxial tests according to the consolidated untrained (CN) test scheme was carried out. The method of ramming a cylindrical sample in a small device of standard sealing equipped with two extension nozzles has been developed. The statistical processing of the test results was carried out and the calculated values of the adhesion and the angle of internal friction of the gravel mixture were established at a humidity of 0.72 of the moisture content of the loamy soil binding crushed stone at the yield boundary. Conclusions. The results make it possible to more reasonably calculate the thickness of the structural layer of a dirt-gravel mix of lower-type road clothes for roads with a low traffic intensity. The results of the work were implemented by designing lower-type road clothes for pilot construction in the conditions of the II, III and IV road-climatic zones of the Omsk region.","PeriodicalId":40951,"journal":{"name":"Russian Journal of Building Construction and Architecture","volume":"180 2","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139273146","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 : 2023-11-15DOI: 10.36622/vstu.2023.60.4.005
R.I. Sapelkin, S.I. Matreninsky, V.Ya. Mishchenko
Statement of the problem. A significant number of PJSC «Gazprom» main gas pipelines were built thirty or more years ago. At that time ineffective insulating materials were used for protecting steel pipes, applied mainly in the conditions of the route, which led to their extremely unsatisfactory condition in the future. Thus, at present there is a need to develop effective protective coatings for steel pipelines using domestic materials and equipment. Results. As a result of a series of experiments the composition of the composite material of the insulating coating based on the rubber concrete (Kauton) optimized to the state of the rubber mastic of the usable consistency has been determined. By carrying out a series of search experiments, rational temperature-time regimes of rubber mastic heat treatment have been determined for the formation of an effective layer of protective coating on the surface of pipe metal isolating it from harmful influences. Experimental device for providing modes of structure formation of pipe metal insulating coating material has been designed. Vulcanization of the rubber-containing mastic on the surface of a steel tube is performed by induction heating of the tube metal maintaining the necessary temperature-time modes of structure formation of the protective coating material. The physical and mechanical characteristics of the insulating coating for steel pipes on the basis of rubber mastic have been determined experimentally. Conclusions. The results of the research allow us to draw a conclusion about expediency, efficiency and significance of application in various areas of industrial production of coatings based on synthetic rubber to protect steel pipes from various negative influences and aggressive environments.
{"title":"Effective Protective Coating of Pipe Metal with High-Strength Corrosion-Resistant Material Based on Low-Molecular Oligodiene","authors":"R.I. Sapelkin, S.I. Matreninsky, V.Ya. Mishchenko","doi":"10.36622/vstu.2023.60.4.005","DOIUrl":"https://doi.org/10.36622/vstu.2023.60.4.005","url":null,"abstract":"Statement of the problem. A significant number of PJSC «Gazprom» main gas pipelines were built thirty or more years ago. At that time ineffective insulating materials were used for protecting steel pipes, applied mainly in the conditions of the route, which led to their extremely unsatisfactory condition in the future. Thus, at present there is a need to develop effective protective coatings for steel pipelines using domestic materials and equipment. Results. As a result of a series of experiments the composition of the composite material of the insulating coating based on the rubber concrete (Kauton) optimized to the state of the rubber mastic of the usable consistency has been determined. By carrying out a series of search experiments, rational temperature-time regimes of rubber mastic heat treatment have been determined for the formation of an effective layer of protective coating on the surface of pipe metal isolating it from harmful influences. Experimental device for providing modes of structure formation of pipe metal insulating coating material has been designed. Vulcanization of the rubber-containing mastic on the surface of a steel tube is performed by induction heating of the tube metal maintaining the necessary temperature-time modes of structure formation of the protective coating material. The physical and mechanical characteristics of the insulating coating for steel pipes on the basis of rubber mastic have been determined experimentally. Conclusions. The results of the research allow us to draw a conclusion about expediency, efficiency and significance of application in various areas of industrial production of coatings based on synthetic rubber to protect steel pipes from various negative influences and aggressive environments.","PeriodicalId":40951,"journal":{"name":"Russian Journal of Building Construction and Architecture","volume":"48 3-4","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139273426","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 : 2023-07-12DOI: 10.36622/vstu.2023.3.59.006
S. Pimenov
Statement of the problem. Due to the uniqueness of each capital construction object and the variety of digital modeling software systems, it is of scientific and practical interest to substantiate the feasibility of using a particular software package. Results. An analysis of the functionality of popular software systems for the development of digital information models at the construction stage using BIM and TIM technologies (Navisworks Manage, Bexel Manager, Synchro 4D Pro, Asta Powerproject BIM, DELMIA) is provided. Their major disadvantages and advantages are identified and detailed. Conclusions. The choice of a software package by a contractor for the development of a construction model (4D model) according to BIM or TIM should be based on an analysis of a number of factors, one of which is the technical complexity of the construction object. The richer in resources and attributes the building is, the more reliable and closer it will be to the real conditions of construction, and the less organizational errors will be detected at the construction site.
{"title":"Analysis of Modern Software for Virtual Construction (4D Modeling)","authors":"S. Pimenov","doi":"10.36622/vstu.2023.3.59.006","DOIUrl":"https://doi.org/10.36622/vstu.2023.3.59.006","url":null,"abstract":"Statement of the problem. Due to the uniqueness of each capital construction object and the variety of digital modeling software systems, it is of scientific and practical interest to substantiate the feasibility of using a particular software package. Results. An analysis of the functionality of popular software systems for the development of digital information models at the construction stage using BIM and TIM technologies (Navisworks Manage, Bexel Manager, Synchro 4D Pro, Asta Powerproject BIM, DELMIA) is provided. Their major disadvantages and advantages are identified and detailed. Conclusions. The choice of a software package by a contractor for the development of a construction model (4D model) according to BIM or TIM should be based on an analysis of a number of factors, one of which is the technical complexity of the construction object. The richer in resources and attributes the building is, the more reliable and closer it will be to the real conditions of construction, and the less organizational errors will be detected at the construction site.","PeriodicalId":40951,"journal":{"name":"Russian Journal of Building Construction and Architecture","volume":"2 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73093308","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 : 2023-07-12DOI: 10.36622/vstu.2023.3.59.002
E. Aralov, B. M. Kumitsky, O. Kutsigina, O. Dornyak
Statement of the problem. The purpose of the scientific article is to develop a complex thermal model for accurate prediction of the thermal state of the room when using a two-zone dark gas-radiant heater. The thermal state of a room depends on various factors such as room size, thermal insulation, heater po-wer and outdoor temperature. In the existing literature, there is no comprehensive approach to modeling that takes into account these factors when considering the specifics of the heating structure of a two-zone dark gas-radiant heater. In addition, the availability of advanced modeling tools, such as the ANSYS Fluent software package, makes it possible to develop a high-quality thermal model. However, an efficient methodology needs to be developed that integrates the characteristics of an efficient heater design into the modeling framework. Results and Conclusions. Solving these problems, this work is aimed at creating a model that accurately predicts the thermal state of the room when using a gas radiant heater. The developed model will serve as a valuable tool for engineers, architects and heating professionals to optimize the performance and efficiency of such heating systems. Ultimately, this research will contribute to improving human comfort, reducing energy consumption and improving the overall sustainability of heating systems in various applications.
{"title":"Modeling of the Thermal State of a Room when Using the Heating Structure of a Two-zone Dark Gas-beam Heater","authors":"E. Aralov, B. M. Kumitsky, O. Kutsigina, O. Dornyak","doi":"10.36622/vstu.2023.3.59.002","DOIUrl":"https://doi.org/10.36622/vstu.2023.3.59.002","url":null,"abstract":"Statement of the problem. The purpose of the scientific article is to develop a complex thermal model for accurate prediction of the thermal state of the room when using a two-zone dark gas-radiant heater. The thermal state of a room depends on various factors such as room size, thermal insulation, heater po-wer and outdoor temperature. In the existing literature, there is no comprehensive approach to modeling that takes into account these factors when considering the specifics of the heating structure of a two-zone dark gas-radiant heater. In addition, the availability of advanced modeling tools, such as the ANSYS Fluent software package, makes it possible to develop a high-quality thermal model. However, an efficient methodology needs to be developed that integrates the characteristics of an efficient heater design into the modeling framework. Results and Conclusions. Solving these problems, this work is aimed at creating a model that accurately predicts the thermal state of the room when using a gas radiant heater. The developed model will serve as a valuable tool for engineers, architects and heating professionals to optimize the performance and efficiency of such heating systems. Ultimately, this research will contribute to improving human comfort, reducing energy consumption and improving the overall sustainability of heating systems in various applications.","PeriodicalId":40951,"journal":{"name":"Russian Journal of Building Construction and Architecture","volume":"30 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82684436","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 : 2023-07-12DOI: 10.36622/vstu.2023.3.59.001
M. Merazka, M.S. Kim
Statement of the problem. The influence of a ground brace with a spacer attached to the pile trunk on the movement and bearing capacity of piles under horizontal loads is investigated and the results obtained during the experiment are compared with the test results of a single pile. Results. A noticeable effect of the presence of a bed on the movement of the pile foundation has been established. With equal loads, piles with a bed have horizontal movement and the angle of rotation of the pile head is up to 2÷3 times less than those without a bed. An increase in the length of the strut leads to a decrease in the horizontal movement of the pile head up to 1.6 times and the angle of rotation up to 1.9 times compared to that with a bed, but without a strut. The bearing capacity of a pile with a bed increases up to 1.66 times with an increase in the length of the spacer from 0 to 3d, where d is the diameter of the cross-section of the pile. Conclusions. The dependence of the increase in the bearing capacity of the pile on the presence of a bed with a spacer was experimentally verified. The test results demonstrate a considerable ffect of the presence of a bed with a spacer on the horizontal and vertical movements of the pile, as well as on the decrease in the angle of rotation of the pile head.
{"title":"The Effect of a Ground Brace with a Spacer on the Displacement and Bearing Capacity of a Horizontally Loaded Single Pile","authors":"M. Merazka, M.S. Kim","doi":"10.36622/vstu.2023.3.59.001","DOIUrl":"https://doi.org/10.36622/vstu.2023.3.59.001","url":null,"abstract":"Statement of the problem. The influence of a ground brace with a spacer attached to the pile trunk on the movement and bearing capacity of piles under horizontal loads is investigated and the results obtained during the experiment are compared with the test results of a single pile. Results. A noticeable effect of the presence of a bed on the movement of the pile foundation has been established. With equal loads, piles with a bed have horizontal movement and the angle of rotation of the pile head is up to 2÷3 times less than those without a bed. An increase in the length of the strut leads to a decrease in the horizontal movement of the pile head up to 1.6 times and the angle of rotation up to 1.9 times compared to that with a bed, but without a strut. The bearing capacity of a pile with a bed increases up to 1.66 times with an increase in the length of the spacer from 0 to 3d, where d is the diameter of the cross-section of the pile. Conclusions. The dependence of the increase in the bearing capacity of the pile on the presence of a bed with a spacer was experimentally verified. The test results demonstrate a considerable ffect of the presence of a bed with a spacer on the horizontal and vertical movements of the pile, as well as on the decrease in the angle of rotation of the pile head.","PeriodicalId":40951,"journal":{"name":"Russian Journal of Building Construction and Architecture","volume":"21 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81661392","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 : 2023-07-12DOI: 10.36622/vstu.2023.3.59.009
M. Kirsanov
Statement of the problem. The scheme of triangular in terms of dome type cover is proposed. The construction is statically determinate. The formulas for the dependence of the deflection on the number of panels and sizes are derived by generalizing a series of individual solutions by induction. Materials and methods. The forces in the coating rods are performed by cutting nodes in symbolic form using operators of the Maple symbolic mathematics system. The unknown systems of equilibrium equations in projections on the coordinate axis include the reactions of vertical supports located on the sides of the truss. One of the corners of the truss also has a spherical support, one is cylindrical. The Maxwell—Mohr formula is used to calculate the deflection of the vertex. The analysis of sequences of coefficients in solutions for individual trusses with different numbers of panels yields expressions for common terms included in the desired calculation formula. Results. Formulas for the dependence of the deflections of the truss on the number of panels for a vertical load evenly distributed over the nodes of the truss and a horizontal wind load applied to one of the sides of the structure are obtained. The solutions have a simple polynomial form. The curves of the dependence of the horizontal displacement of the dome top on the number of panels reveal a minimum. Asymptotics of the solutions is identified. Conclusions. A scheme of a statically determinate symmetric spatial dome is developed and its mathematical model is constructed, allowing analytical solutions with an arbitrary number of panels. The identified dependencies can be used both to evaluate the accuracy of numerical solutions and to find optimal combinations of structural dimensions in terms of rigidity.
{"title":"Formulas for Calculating the Deflections of a Triangular Truss of Spatial Cover","authors":"M. Kirsanov","doi":"10.36622/vstu.2023.3.59.009","DOIUrl":"https://doi.org/10.36622/vstu.2023.3.59.009","url":null,"abstract":"Statement of the problem. The scheme of triangular in terms of dome type cover is proposed. The construction is statically determinate. The formulas for the dependence of the deflection on the number of panels and sizes are derived by generalizing a series of individual solutions by induction. Materials and methods. The forces in the coating rods are performed by cutting nodes in symbolic form using operators of the Maple symbolic mathematics system. The unknown systems of equilibrium equations in projections on the coordinate axis include the reactions of vertical supports located on the sides of the truss. One of the corners of the truss also has a spherical support, one is cylindrical. The Maxwell—Mohr formula is used to calculate the deflection of the vertex. The analysis of sequences of coefficients in solutions for individual trusses with different numbers of panels yields expressions for common terms included in the desired calculation formula. Results. Formulas for the dependence of the deflections of the truss on the number of panels for a vertical load evenly distributed over the nodes of the truss and a horizontal wind load applied to one of the sides of the structure are obtained. The solutions have a simple polynomial form. The curves of the dependence of the horizontal displacement of the dome top on the number of panels reveal a minimum. Asymptotics of the solutions is identified. Conclusions. A scheme of a statically determinate symmetric spatial dome is developed and its mathematical model is constructed, allowing analytical solutions with an arbitrary number of panels. The identified dependencies can be used both to evaluate the accuracy of numerical solutions and to find optimal combinations of structural dimensions in terms of rigidity.","PeriodicalId":40951,"journal":{"name":"Russian Journal of Building Construction and Architecture","volume":"79 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80296710","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 : 2023-07-12DOI: 10.36622/vstu.2023.3.59.008
F. V. Matvienko, O. Kukina, A. Strokin, A. Lukashuk
Problem statement. When performing road construction works using cold recycling technology, the construction of foundations from cement-crushed stone-gravel-sand mixtures or reinforced soils, the question arises about the use of various modifiers or stabilizers. A large number of various modifications and stabilizers are produced serially on the territory of the Russian Federation, which are additives used together with binders to improve the quality of reinforced materials - structural layers of road clothes. Determining the effect of modifiers and stabilizers (in particular, the MADOR modifier) on the structure of the binder-reinforced material requires research by physico-chemical methods. Results. The review of the results of physico-chemical studies of the effect of the MADOR modification on the structure of non-cohesive soils reinforced with cement and used for the construction of structural layers of pavement is given. The results of studies of the structure of the material reinforced with cement together with the MADOR modifier are presented. Conclusions. A positive effect from the use of the MADOR modifier for strengthening the material under study has been established due to the predominance of the active phase, which provides a higher uniformity of the structure and increased physical and mechanical properties. The studies carried out allow us to conclude that the durability and reliability of the structural layers of road clothes arranged by the method of cold regeneration using the MADOR modifier are increased.
{"title":"Physico-chemical Methods for Investigating the Effect of the «Mador» Modifier on the Characteristics of Cement Reinforced Material","authors":"F. V. Matvienko, O. Kukina, A. Strokin, A. Lukashuk","doi":"10.36622/vstu.2023.3.59.008","DOIUrl":"https://doi.org/10.36622/vstu.2023.3.59.008","url":null,"abstract":"Problem statement. When performing road construction works using cold recycling technology, the construction of foundations from cement-crushed stone-gravel-sand mixtures or reinforced soils, the question arises about the use of various modifiers or stabilizers. A large number of various modifications and stabilizers are produced serially on the territory of the Russian Federation, which are additives used together with binders to improve the quality of reinforced materials - structural layers of road clothes. Determining the effect of modifiers and stabilizers (in particular, the MADOR modifier) on the structure of the binder-reinforced material requires research by physico-chemical methods. Results. The review of the results of physico-chemical studies of the effect of the MADOR modification on the structure of non-cohesive soils reinforced with cement and used for the construction of structural layers of pavement is given. The results of studies of the structure of the material reinforced with cement together with the MADOR modifier are presented. Conclusions. A positive effect from the use of the MADOR modifier for strengthening the material under study has been established due to the predominance of the active phase, which provides a higher uniformity of the structure and increased physical and mechanical properties. The studies carried out allow us to conclude that the durability and reliability of the structural layers of road clothes arranged by the method of cold regeneration using the MADOR modifier are increased.","PeriodicalId":40951,"journal":{"name":"Russian Journal of Building Construction and Architecture","volume":"12 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73176317","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 : 2023-07-12DOI: 10.36622/vstu.2023.3.59.010
E. Kokorina, E.N. Sheina
Statement of the problem. The objectives of the study are to analyze the history of the emergence and formation of oceanariums as separate structures, to study domestic and foreign experience in the design of oceanographic complexes with the identification of the classification of objects and their functional differences as well as to identify typologies typical for the design of such objects in order to create a new model of the oceanarium. Results. Based on the existing methods of shaping and organizing space, a new conceptual idea of the external appearance of the oceanographic complex is proposed. Conclusions. An architectural design of a conceptually new oceanographic complex has been created ta-king into account the identified design principles and methods.
{"title":"Architectural Concept Modern Oceanographic Complex","authors":"E. Kokorina, E.N. Sheina","doi":"10.36622/vstu.2023.3.59.010","DOIUrl":"https://doi.org/10.36622/vstu.2023.3.59.010","url":null,"abstract":"Statement of the problem. The objectives of the study are to analyze the history of the emergence and formation of oceanariums as separate structures, to study domestic and foreign experience in the design of oceanographic complexes with the identification of the classification of objects and their functional differences as well as to identify typologies typical for the design of such objects in order to create a new model of the oceanarium. Results. Based on the existing methods of shaping and organizing space, a new conceptual idea of the external appearance of the oceanographic complex is proposed. Conclusions. An architectural design of a conceptually new oceanographic complex has been created ta-king into account the identified design principles and methods.","PeriodicalId":40951,"journal":{"name":"Russian Journal of Building Construction and Architecture","volume":"37 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73212163","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 : 2023-07-12DOI: 10.36622/vstu.2023.3.59.004
О.N. Medvedeva, S. Perevalov, К.А. Sklyarov, O. Kutsigina
Statement of the problem. As a rule, when choosing a method of transporting natural gas to various ca-tegories of consumers, several options are considered depending on the mutual distance between the source and the consumer — the construction of a gas pipeline or the creation of an infrastructure for li-quefied gases. The competitiveness of liquefied natural gas (LNG) in comparison with natural gas is proposed to be determined within the framework of model gas supply schemes for different ranges of alternative energy supply systems. Results. The results of the calculation according to the developed algorithm based on the Clark-Wright method allow us to conclude on the least expensive layout option for automotive cryogenic tanks and cryogenic storage facilities for consumers, determine the number of working hours per month for truck tanks, and also determine the optimal number of cryogenic tanks to deliver the required volume LNG and the number of cryogenic storage tanks at consumers. Conclusions. The proposed economic and mathematical model can be used to substantiate the competitiveness of the use of natural and liquefied natural gases to meet the various needs of consumers. The proposed mathematical calculation model makes it possible to identify the efficiency of each of the energy carriers, as well as to identify the main criteria for choosing the most efficient energy carrier for specific conditions of use.
{"title":"Development of Recommendations for the Creation of Liquefied Natural Gas Infrastructure","authors":"О.N. Medvedeva, S. Perevalov, К.А. Sklyarov, O. Kutsigina","doi":"10.36622/vstu.2023.3.59.004","DOIUrl":"https://doi.org/10.36622/vstu.2023.3.59.004","url":null,"abstract":"Statement of the problem. As a rule, when choosing a method of transporting natural gas to various ca-tegories of consumers, several options are considered depending on the mutual distance between the source and the consumer — the construction of a gas pipeline or the creation of an infrastructure for li-quefied gases. The competitiveness of liquefied natural gas (LNG) in comparison with natural gas is proposed to be determined within the framework of model gas supply schemes for different ranges of alternative energy supply systems. Results. The results of the calculation according to the developed algorithm based on the Clark-Wright method allow us to conclude on the least expensive layout option for automotive cryogenic tanks and cryogenic storage facilities for consumers, determine the number of working hours per month for truck tanks, and also determine the optimal number of cryogenic tanks to deliver the required volume LNG and the number of cryogenic storage tanks at consumers. Conclusions. The proposed economic and mathematical model can be used to substantiate the competitiveness of the use of natural and liquefied natural gases to meet the various needs of consumers. The proposed mathematical calculation model makes it possible to identify the efficiency of each of the energy carriers, as well as to identify the main criteria for choosing the most efficient energy carrier for specific conditions of use.","PeriodicalId":40951,"journal":{"name":"Russian Journal of Building Construction and Architecture","volume":"42 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75723108","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 : 2023-07-12DOI: 10.36622/vstu.2023.3.59.005
V. Chandrasekaran
Introduction. The impact strength through of Two-layer (600 mm × 600 mm × 60 mm) concrete slab was experimentally investigated by the following method using Weight falling test (ACI committee 544). Result. Nine numbers of slab specimens were cast (S1 to S9), with one specimen (S1) was normal plain cement concrete slab (control specimen). The purpose of the study, The addition of Polypropylene fibre (PPF) in the top 30 mm depth of the slab was from 0.2 % to 0.8 % in step of 0.2 % and the addition of hooked end steel fibre (SF) in the bottom 30 mm depth of the slab was from 0.5 % to 2 % in step of 0.5 % for the other two layered slab specimens (S2 to S9). Also, a fixed 20 % (out of the total requirement of the binder) of mineral admixture namely Ground Granulated Blast Furnace Slag (GGBS) was used as a partial replacement of binder in all the slab specimens. Each specimen was tested under weight falling test. The number of blows required to obtain final crack failures in specimens was 30, 98, 168, 125, 252, 102, 153, 245 and 46 respectively for S1 to S9. Conclusions. The comparative analysis of crack pattern and impact strength of 2-layer fibre reinforced concrete slab specimens (S2 to S9) were presented. The performance of slab specimen S5 was the best among other slab specimen and it had absorbed more impact energy and controlled crack less than the normal plain cement concrete slab specimen (S1).
{"title":"Assessment of Impact Strength of Two-layer Fibrous Concrete Slab Using Polypropylene & Steel Fiber with Mineral Admixture","authors":"V. Chandrasekaran","doi":"10.36622/vstu.2023.3.59.005","DOIUrl":"https://doi.org/10.36622/vstu.2023.3.59.005","url":null,"abstract":"Introduction. The impact strength through of Two-layer (600 mm × 600 mm × 60 mm) concrete slab was experimentally investigated by the following method using Weight falling test (ACI committee 544). Result. Nine numbers of slab specimens were cast (S1 to S9), with one specimen (S1) was normal plain cement concrete slab (control specimen). The purpose of the study, The addition of Polypropylene fibre (PPF) in the top 30 mm depth of the slab was from 0.2 % to 0.8 % in step of 0.2 % and the addition of hooked end steel fibre (SF) in the bottom 30 mm depth of the slab was from 0.5 % to 2 % in step of 0.5 % for the other two layered slab specimens (S2 to S9). Also, a fixed 20 % (out of the total requirement of the binder) of mineral admixture namely Ground Granulated Blast Furnace Slag (GGBS) was used as a partial replacement of binder in all the slab specimens. Each specimen was tested under weight falling test. The number of blows required to obtain final crack failures in specimens was 30, 98, 168, 125, 252, 102, 153, 245 and 46 respectively for S1 to S9. Conclusions. The comparative analysis of crack pattern and impact strength of 2-layer fibre reinforced concrete slab specimens (S2 to S9) were presented. The performance of slab specimen S5 was the best among other slab specimen and it had absorbed more impact energy and controlled crack less than the normal plain cement concrete slab specimen (S1).","PeriodicalId":40951,"journal":{"name":"Russian Journal of Building Construction and Architecture","volume":"28 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83716066","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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