Pub Date : 2023-09-29DOI: 10.22337/2587-9618-2023-19-3-39-48
Liudmila Kuzmina, Yuri Osipov, Artem Pesterev
During construction, a liquid solution of a grout or waterproof filler is pumped into porous rock to improve its properties. The filtration of a suspension moving at a variable speed in a porous medium is simulated. A one-dimensional problem of filtration in a homogeneous porous medium with a curvilinear concentration front of suspended and retained particles is considered. For the numerical solution of the problem by the method of finite differences, the method of characteristics is used. The transition to characteristic variables allows one to straighten the front and construct a discrete grid with a constant step. When calculating the solution using an explicit difference scheme, additional points are used that do not coincide with the grid nodes. A detailed description of the algorithm for calculating a solution at the grid nodes and an example of a numerical solution of the problem are given.
{"title":"CHARACTERISTIC METHOD FOR SOLVING FILTRATION PROBLEM","authors":"Liudmila Kuzmina, Yuri Osipov, Artem Pesterev","doi":"10.22337/2587-9618-2023-19-3-39-48","DOIUrl":"https://doi.org/10.22337/2587-9618-2023-19-3-39-48","url":null,"abstract":"During construction, a liquid solution of a grout or waterproof filler is pumped into porous rock to improve its properties. The filtration of a suspension moving at a variable speed in a porous medium is simulated. A one-dimensional problem of filtration in a homogeneous porous medium with a curvilinear concentration front of suspended and retained particles is considered. For the numerical solution of the problem by the method of finite differences, the method of characteristics is used. The transition to characteristic variables allows one to straighten the front and construct a discrete grid with a constant step. When calculating the solution using an explicit difference scheme, additional points are used that do not coincide with the grid nodes. A detailed description of the algorithm for calculating a solution at the grid nodes and an example of a numerical solution of the problem are given.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135294149","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}
Morocco, which is in a seismically active zone, is currently experiencing a significant development in terms of the realization of development and infrastructure projects. Therefore, reflection on soil liquefaction problems during project design is essential. The densification of soils by vibro compaction is a recent process of soil treatment, its effect is to improve the geo mechanical characteristics of the soil in this case the relative density and subsequently the reduction of the potential for liquefaction, it is a technique soil improvement in the mass, it is closely linked to the grain size of the soil to be treated, its percentage of fines less than 10% (going to 0.08 mm <10%), this technique gives the treated soil sufficient cohesion to avoid large increases in pore pressures during the earthquake. This article aims, through the study of a real case, to evaluate the effectiveness of vibro compaction to improve the relative density of the soil and consequently the reduction of the risk of liquefaction of the treated soil. The work focuses on the analysis of the SPT tests carried out before treatment and on the CPT tests of control of the vibro-compactge works carried out after execution. This study showed that this process generates an effect of improvement of the relative density and reduction of the compaction by inducing a reduction of the risk of liquefaction
摩洛哥位于地震活跃地带，目前在实现开发和基础设施项目方面正在取得重大进展。因此，在工程设计中对土壤液化问题进行思考是十分必要的。振动压实对土壤的致密化是一种最近的土壤处理过程，它的作用是改善土壤的岩土力学特性，在这种情况下，相对密度和随后的液化潜力的减少，它是一种技术土壤的质量改善，它与待处理土壤的粒度密切相关，其细粒百分比小于10%(达到0.08 mm <10%)，这种技术使处理过的土壤具有足够的凝聚力，以避免地震期间孔隙压力的大幅增加。本文旨在通过一个实际案例的研究，评价振动压实在提高土壤相对密度，从而降低处理后土壤液化风险方面的有效性。这项工作的重点是分析处理前进行的SPT试验和处理后进行的振冲压实工程控制的CPT试验。研究表明，这一过程通过降低液化风险，产生了提高相对密度和减少压实的效果
{"title":"THE EFFECT OF SOIL DENSIFICATION ON THE ATTENUATION OF THE PHENOMENON OF SOIL LIQUEFACTION IN A PORT PROJECT IN MOROCCO","authors":"Mohamed Bziaz, Lahcen Bahi, Latifa Ouadif, Anas Bahi, Abdehak Sabihi, Hamou Mansouri","doi":"10.22337/2587-9618-2023-19-3-130-140","DOIUrl":"https://doi.org/10.22337/2587-9618-2023-19-3-130-140","url":null,"abstract":"Morocco, which is in a seismically active zone, is currently experiencing a significant development in terms of the realization of development and infrastructure projects. Therefore, reflection on soil liquefaction problems during project design is essential. The densification of soils by vibro compaction is a recent process of soil treatment, its effect is to improve the geo mechanical characteristics of the soil in this case the relative density and subsequently the reduction of the potential for liquefaction, it is a technique soil improvement in the mass, it is closely linked to the grain size of the soil to be treated, its percentage of fines less than 10% (going to 0.08 mm <10%), this technique gives the treated soil sufficient cohesion to avoid large increases in pore pressures during the earthquake. This article aims, through the study of a real case, to evaluate the effectiveness of vibro compaction to improve the relative density of the soil and consequently the reduction of the risk of liquefaction of the treated soil. The work focuses on the analysis of the SPT tests carried out before treatment and on the CPT tests of control of the vibro-compactge works carried out after execution. This study showed that this process generates an effect of improvement of the relative density and reduction of the compaction by inducing a reduction of the risk of liquefaction","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135294139","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 : 2023-09-29DOI: 10.22337/2587-9618-2023-19-3-31-38
Sergey Kudryavtsev, Tatyana Valtseva, Igor Gavrilov
When studying freezing, permafrost and thawing soils, it is absolutely necessary to develop models of processes occurring in soils and their mathematical description as a basis. This will make it possible to perform a calculated assessment of the "thawing foundation - structure" system during the entire lifetime of the object, which will make it possible to design it correctly. The article considers a soil model that allows us to consider the process of degradation of permafrost soils of the base of the railway roadbed in the zone of passage of construction equipment.
{"title":"NUMERICAL MODELING OF THE PROCESS OF DEGRADATION OF PERMAFROST SOILS OF THE BASE OF THE RAILWAY ROADBED IN THE AREA OF PASSAGE OF CONSTRUCTION EQUIPMENT","authors":"Sergey Kudryavtsev, Tatyana Valtseva, Igor Gavrilov","doi":"10.22337/2587-9618-2023-19-3-31-38","DOIUrl":"https://doi.org/10.22337/2587-9618-2023-19-3-31-38","url":null,"abstract":"When studying freezing, permafrost and thawing soils, it is absolutely necessary to develop models of processes occurring in soils and their mathematical description as a basis. This will make it possible to perform a calculated assessment of the \"thawing foundation - structure\" system during the entire lifetime of the object, which will make it possible to design it correctly. The article considers a soil model that allows us to consider the process of degradation of permafrost soils of the base of the railway roadbed in the zone of passage of construction equipment.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135294293","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 : 2023-09-29DOI: 10.22337/2587-9618-2023-19-3-165-172
Alexander Belostotsky, Andrei Pavlov, Alexandr Nagibovich
The article presents the results of numerical simulation of a unique long-span structure subjected to seismic loads. The roof and facade of structures were connected to reinforced concrete base with joints with gaps. The simulation was realized for ideal model and model with gap imperfections. Various modeling approaches for the joints and the resulting dynamic response were examined.
{"title":"NUMERICAL SIMULATION OF THE STRESS-STRAIN STATE OF A LARGE-SPAN STRUCTURE WITH JOINTS WITH GAP UNDER THE SEISMIC LOADS IN A TRANSIENT DYNAMIC","authors":"Alexander Belostotsky, Andrei Pavlov, Alexandr Nagibovich","doi":"10.22337/2587-9618-2023-19-3-165-172","DOIUrl":"https://doi.org/10.22337/2587-9618-2023-19-3-165-172","url":null,"abstract":"The article presents the results of numerical simulation of a unique long-span structure subjected to seismic loads. The roof and facade of structures were connected to reinforced concrete base with joints with gaps. The simulation was realized for ideal model and model with gap imperfections. Various modeling approaches for the joints and the resulting dynamic response were examined.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135294294","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 : 2023-09-29DOI: 10.22337/2587-9618-2023-19-3-141-154
Adharsh G, Sivakumar R., К.С. Satyanarayanan
Andaman and Nicobar Islands is one of the most earthquake experienced areas around the world subjected to frequent earthquakes which is being the area of study using rapid visual screening (RVS) method by google maps and field visit as well. Although the google maps and internet sources can be used to cover up 80 percent data required for assessing and quantifying the RVS score but a field visit was made for extracting more relevant data for a detailed study. Port Blair municipal area was narrowed down for the screening since it had the greatest number of buildings. It was found that the moment resisting frames have been used in most of the buildings. RC moment resisting frames, load bearing structures, steel structures and wooden structures were studied in the screening and score was awarded. Gleaned from the score it was derived that old buildings are more susceptible for higher damage in near future then the recently constructed building.
{"title":"SEISMIC VULNERABILITY ASSESSMENT FOR BUILDINGS OF PORT BLAIR CITY USING RAPID VISUAL SCREENING AS A TOOL","authors":"Adharsh G, Sivakumar R., К.С. Satyanarayanan","doi":"10.22337/2587-9618-2023-19-3-141-154","DOIUrl":"https://doi.org/10.22337/2587-9618-2023-19-3-141-154","url":null,"abstract":"Andaman and Nicobar Islands is one of the most earthquake experienced areas around the world subjected to frequent earthquakes which is being the area of study using rapid visual screening (RVS) method by google maps and field visit as well. Although the google maps and internet sources can be used to cover up 80 percent data required for assessing and quantifying the RVS score but a field visit was made for extracting more relevant data for a detailed study. Port Blair municipal area was narrowed down for the screening since it had the greatest number of buildings. It was found that the moment resisting frames have been used in most of the buildings. RC moment resisting frames, load bearing structures, steel structures and wooden structures were studied in the screening and score was awarded. Gleaned from the score it was derived that old buildings are more susceptible for higher damage in near future then the recently constructed building.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135293966","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 : 2023-09-29DOI: 10.22337/2587-9618-2023-19-3-49-57
Михаил Петров, Александр Кибец, Борис Михайлов, Екатерина Гоник, Виктор Иванов
Экспериментальные исследования выполнены с целью изучения влияния сыпучего заполнителя на устойчивость оболочек при кручении. В отечественной и зарубежной литературе не обнаружены нами публикации, где рассматривалось бы устойчивость тонкостенных оболочек, заполненных сыпучим материалом, при кручении. Для выполнения экспериментов разработана и изготовлена специальная установка, позволяющая испытывать образцы на кручение, на изгиб и на сложное нагружение, нагружая образцы соответствующим образом. До испытаний производился отбор образцов на отсутствие дефектов в виде вмятин, овальности, разностенности, постоянства размеров поперечного сечения. Известно, что дефекты образцов существенно влияют на устойчивость. Образцы испытывались длиной 140 мм, 90 мм, 25 мм. Образцы изготавливались глубокой вытяжкой из высокопластичного алюминиевого сплава 3004 в состоянии Н19. В данном случае один конец образцов жестко закреплялся к установке, к другому концу прикладывался крутящий момент, который возрастал до потери устойчивости образцов. В начале и в конце испытания нагружали образцы малыми порциями, чтобы уловить начало движения и начало потери устойчивости. Установка позволяла создавать различные граничные условия образцов. В экспериментах измеряли крутящий момент и угол закручивания. Построены линейные зависимости угла закручивания от крутящего момента. Значит устойчивость терялась в упругости. Для образцов, заполненных сыпучим заполнителем, в начале процесса закручивания имело место нелинейная зависимость между крутящим моментом и углом закручивания. Это связано с возникновением сил трения между заполнителем и внутренней стенкой образцов, которые создавали противодействующий крутящий момент. Затем графики для пустых и заполненных образцов увеличивались параллельно друг другу. Для пустых образцов [1] рассчитывались критические напряжения, критические углы закручивания, число образовавшихся волн, их направление. Получена сходимость расчетных и экспериментальных параметров в пределах 36%. Сыпучий заполнитель, в виде железного порошка увеличивал значение критического крутящего момента до 17%.
{"title":"ЭКСПЕРИМЕНТАЛЬНЫЕ ИССЛЕДОВАНИЯ УСТОЙЧИВОСТИ ТОНКОСТЕННЫХ ЦИЛИНДРИЧЕСКИХ ОБОЛОЧЕК СРЕДНЕЙ ДЛИНЫ, ЗАПОЛНЕННЫХ СЫПУЧИМ МАТЕРИАЛОМ, ПРИ КРУЧЕНИИ","authors":"Михаил Петров, Александр Кибец, Борис Михайлов, Екатерина Гоник, Виктор Иванов","doi":"10.22337/2587-9618-2023-19-3-49-57","DOIUrl":"https://doi.org/10.22337/2587-9618-2023-19-3-49-57","url":null,"abstract":"Экспериментальные исследования выполнены с целью изучения влияния сыпучего заполнителя на устойчивость оболочек при кручении. В отечественной и зарубежной литературе не обнаружены нами публикации, где рассматривалось бы устойчивость тонкостенных оболочек, заполненных сыпучим материалом, при кручении. Для выполнения экспериментов разработана и изготовлена специальная установка, позволяющая испытывать образцы на кручение, на изгиб и на сложное нагружение, нагружая образцы соответствующим образом. До испытаний производился отбор образцов на отсутствие дефектов в виде вмятин, овальности, разностенности, постоянства размеров поперечного сечения. Известно, что дефекты образцов существенно влияют на устойчивость. Образцы испытывались длиной 140 мм, 90 мм, 25 мм. Образцы изготавливались глубокой вытяжкой из высокопластичного алюминиевого сплава 3004 в состоянии Н19. В данном случае один конец образцов жестко закреплялся к установке, к другому концу прикладывался крутящий момент, который возрастал до потери устойчивости образцов. В начале и в конце испытания нагружали образцы малыми порциями, чтобы уловить начало движения и начало потери устойчивости. Установка позволяла создавать различные граничные условия образцов. В экспериментах измеряли крутящий момент и угол закручивания. Построены линейные зависимости угла закручивания от крутящего момента. Значит устойчивость терялась в упругости. Для образцов, заполненных сыпучим заполнителем, в начале процесса закручивания имело место нелинейная зависимость между крутящим моментом и углом закручивания. Это связано с возникновением сил трения между заполнителем и внутренней стенкой образцов, которые создавали противодействующий крутящий момент. Затем графики для пустых и заполненных образцов увеличивались параллельно друг другу. Для пустых образцов [1] рассчитывались критические напряжения, критические углы закручивания, число образовавшихся волн, их направление. Получена сходимость расчетных и экспериментальных параметров в пределах 36%. Сыпучий заполнитель, в виде железного порошка увеличивал значение критического крутящего момента до 17%.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135294291","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 : 2023-09-29DOI: 10.22337/2587-9618-2023-19-3-92-113
Saddouki Souheyla, Djarir Яхиауи, Rafik Demagh
In most current seismic design on bridges, only mainshock actions are considered without incorporating the effect of mainshock-aftershock (MA) sequences and interaction soil-pile.However, a large mainshock usually triggers numerous aftershocks in a short period. This paperstudy the effect of mainshock-aftershock sequences on the behavior of interaction Soil-pile-structure system (ISPS). abeam on nonlinearWinkler foundation (BNWF) model is usingand subjected to non-linear static analysis and incremental dynamic analysis (IDA) leading finally to the fragility curves which are developed. These analyses aim to capture the collapse state of structures under aftershock events preceded by various mainshock levels. Results obtained from capacity curve, incremental dynamic and fragility curves of ISSP system.The analytical results show that in the MA sequences,for dense soil the vulnerable of mainshock-aftershock (MS-AS) loading are more damage due to mainshock loading for all diameter of the pile and the mass. For soft soil are more vulnerable to damage due to mainshock-aftershock (MS-AS) loading. But in the stiff clay the effect of mainshock-aftershock (MS-AS) loading for all the diameter of pile and for masse are neglected.
Keywords:bridge,interaction soil-pile-structure, Winkler foundation, dynamic analysis, fragility curves,mainshock-aftershock.
{"title":"SEISMIC FRAGILITY EVALUATION OF SOIL-PILE-STRUCTURE INTERACTION EFFECTS SUBJECTED TO MAINSHOCK-AFTERSHOCK RECORDS","authors":"Saddouki Souheyla, Djarir Яхиауи, Rafik Demagh","doi":"10.22337/2587-9618-2023-19-3-92-113","DOIUrl":"https://doi.org/10.22337/2587-9618-2023-19-3-92-113","url":null,"abstract":"In most current seismic design on bridges, only mainshock actions are considered without incorporating the effect of mainshock-aftershock (MA) sequences and interaction soil-pile.However, a large mainshock usually triggers numerous aftershocks in a short period. This paperstudy the effect of mainshock-aftershock sequences on the behavior of interaction Soil-pile-structure system (ISPS). abeam on nonlinearWinkler foundation (BNWF) model is usingand subjected to non-linear static analysis and incremental dynamic analysis (IDA) leading finally to the fragility curves which are developed. These analyses aim to capture the collapse state of structures under aftershock events preceded by various mainshock levels. Results obtained from capacity curve, incremental dynamic and fragility curves of ISSP system.The analytical results show that in the MA sequences,for dense soil the vulnerable of mainshock-aftershock (MS-AS) loading are more damage due to mainshock loading for all diameter of the pile and the mass. For soft soil are more vulnerable to damage due to mainshock-aftershock (MS-AS) loading. But in the stiff clay the effect of mainshock-aftershock (MS-AS) loading for all the diameter of pile and for masse are neglected.
 Keywords:bridge,interaction soil-pile-structure, Winkler foundation, dynamic analysis, fragility curves,mainshock-aftershock.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135294144","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 : 2023-09-29DOI: 10.22337/2587-9618-2023-19-3-69-82
Vladimir Sidorov, Alim Primkulov
Present paper proposes a computation method for a coupled heat and mass transfer problem within the porous media where the heat conductivity properties of the media undergo changes caused by the mass transfer. Heat and mass transfer processes are coupled through the inclusion of evaporation and condensation phenomena which in turn require the solution to an another the vapour transfer problem. This complex coupled problem re-sults in a system of both linear and non-linear second order partial differential equations that are spatially discre-tized by Finite Element Method. Temporal integration is carried out analytically. Thus, the proposed system of equations covering linear vapor transfer problem, linear filtration problem and non-linear heat transfer problem is transformed into a system of both linear and non-linear first order ordinary differential equations being solved by semi-analytical method. Picard approach of successive iterations is used for linearization of the equations. Convergent solution is achieved which is demonstrated on a sample problem herein below. Proposed method gives good insight on the processes taking place within the structures being subjected to temperature and vapor pressure gradients, including the residual effects of moisture accumulation, and assesses its impact on heat con-ductivity of materials that the structures consist of. Present study is a part of more extensive research on the ap-plication of semi-analytical methods in heat transfer problems, therefore it is not exhaustive and complete. Shortcomings of the method and its possible work-arounds as well as the topics for further studies are discussed in Conclusions and Further Studies section.
{"title":"COUPLED HEAT AND MASS TRANSFER PROBLEM WITH DEPENDENT HEAT CONDUCTIVITY PROPERTIES AND ITS SEMI-ANALYTICAL SOLUTION","authors":"Vladimir Sidorov, Alim Primkulov","doi":"10.22337/2587-9618-2023-19-3-69-82","DOIUrl":"https://doi.org/10.22337/2587-9618-2023-19-3-69-82","url":null,"abstract":"Present paper proposes a computation method for a coupled heat and mass transfer problem within the porous media where the heat conductivity properties of the media undergo changes caused by the mass transfer. Heat and mass transfer processes are coupled through the inclusion of evaporation and condensation phenomena which in turn require the solution to an another the vapour transfer problem. This complex coupled problem re-sults in a system of both linear and non-linear second order partial differential equations that are spatially discre-tized by Finite Element Method. Temporal integration is carried out analytically. Thus, the proposed system of equations covering linear vapor transfer problem, linear filtration problem and non-linear heat transfer problem is transformed into a system of both linear and non-linear first order ordinary differential equations being solved by semi-analytical method. Picard approach of successive iterations is used for linearization of the equations. Convergent solution is achieved which is demonstrated on a sample problem herein below. Proposed method gives good insight on the processes taking place within the structures being subjected to temperature and vapor pressure gradients, including the residual effects of moisture accumulation, and assesses its impact on heat con-ductivity of materials that the structures consist of. Present study is a part of more extensive research on the ap-plication of semi-analytical methods in heat transfer problems, therefore it is not exhaustive and complete. Shortcomings of the method and its possible work-arounds as well as the topics for further studies are discussed in Conclusions and Further Studies section.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135294133","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 : 2023-09-29DOI: 10.22337/2587-9618-2023-19-3-155-164
Marina Mozgaleva, Pavel Akimov
Localization of solution of the problem of three-dimensional theory of elasticity with the use of B-spline discrete-continual finite element method (specific version of wavelet-based discrete-continual finite ele-ment method) is under consideration in the distinctive paper. The original operational continual and discrete-continual formulations of the problem are given, some actual aspects of construction of normalized basis func-tions of a B-spline are considered, the corresponding local constructions for an arbitrary discrete-continual finite element are described, some information about the numerical implementation and an example of analysis are presented.
{"title":"LOCALIZATION OF SOLUTION OF THE PROBLEM OF THREE-DIMENSIONAL THEORY OF ELASTICITY WITH THE USE OF B-SPLINE DISCRETE-CONTINUAL FINITE ELEMENT METHOD","authors":"Marina Mozgaleva, Pavel Akimov","doi":"10.22337/2587-9618-2023-19-3-155-164","DOIUrl":"https://doi.org/10.22337/2587-9618-2023-19-3-155-164","url":null,"abstract":"Localization of solution of the problem of three-dimensional theory of elasticity with the use of B-spline discrete-continual finite element method (specific version of wavelet-based discrete-continual finite ele-ment method) is under consideration in the distinctive paper. The original operational continual and discrete-continual formulations of the problem are given, some actual aspects of construction of normalized basis func-tions of a B-spline are considered, the corresponding local constructions for an arbitrary discrete-continual finite element are described, some information about the numerical implementation and an example of analysis are presented.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135294296","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 : 2023-09-29DOI: 10.22337/2587-9618-2023-19-3-14-19
Tatiana Belash, Anton Yakovlev
Currently, the improvement of methods for calculating building structures is continuing, including, among other things, methods for determining the magnitude of the load. Despite the fact that for most impacts, the principles of determining loads and methods from the application have been formed for a long time, a number of special tasks are sometimes encountered in design practice, for example, the impact of tsunami waves on a structure. This article is devoted to modeling the wave roll on a structure in the "Fluid Flow (Fluent)" module of the ANSYS 2021 software package and comparing the results obtained with the methodology presented in SP 292.1325800.2017 "Buildings and structures in tsunami-prone areas. Design rules". The studies presented in this article have shown that the nature of the propagation of hydrodynamic pressure when modeling wave rolling in ANSYS is similar to that presented in SP 292.1325800.2017: according to a triangular plot with maximum pressure at the bottom. But at the same time, the value of the maximum pressure on the joint venture is about 1.5 times greater than according to the calculation in ANSYS, which is explained by many different factors. But, despite this, modeling of the tsunami waves rolling on the construction site can be performed at the pre-project stage in order to assess the nature of the pressure distribution over the surface of the object, which will allow choosing the most suitable structural and space-planning solutions.
{"title":"MODELING OF LOADS FROM TSUNAMI WAVES ON THE STRUCTURE","authors":"Tatiana Belash, Anton Yakovlev","doi":"10.22337/2587-9618-2023-19-3-14-19","DOIUrl":"https://doi.org/10.22337/2587-9618-2023-19-3-14-19","url":null,"abstract":"Currently, the improvement of methods for calculating building structures is continuing, including, among other things, methods for determining the magnitude of the load. Despite the fact that for most impacts, the principles of determining loads and methods from the application have been formed for a long time, a number of special tasks are sometimes encountered in design practice, for example, the impact of tsunami waves on a structure. This article is devoted to modeling the wave roll on a structure in the \"Fluid Flow (Fluent)\" module of the ANSYS 2021 software package and comparing the results obtained with the methodology presented in SP 292.1325800.2017 \"Buildings and structures in tsunami-prone areas. Design rules\". The studies presented in this article have shown that the nature of the propagation of hydrodynamic pressure when modeling wave rolling in ANSYS is similar to that presented in SP 292.1325800.2017: according to a triangular plot with maximum pressure at the bottom. But at the same time, the value of the maximum pressure on the joint venture is about 1.5 times greater than according to the calculation in ANSYS, which is explained by many different factors. But, despite this, modeling of the tsunami waves rolling on the construction site can be performed at the pre-project stage in order to assess the nature of the pressure distribution over the surface of the object, which will allow choosing the most suitable structural and space-planning solutions.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135294292","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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