International Journal for Computational Civil and Structural Engineering最新文献_第9页

MODELING AND MONITORING OF STRUCTURAL SAFETY OF LONG-OPERATING UNDERGROUND STRUCTURES OF THE SEWAGE SYSTEM IN THE CONDITIONS OF INCREASING ANTHROPOGENIC ACTIONS IN ORDER TO PROVIDE SUSTAINABLE LIFECYCLE OF ENGINEERING INFRASTRUCTURE OF THE MEGACITY (THE EXPERIENCE OF ST. PETERSBURG) 在人为活动日益增加的情况下，为特大城市工程基础设施的可持续生命周期提供长期运行的地下污水系统结构安全建模和监测(圣彼得堡的经验)

International Journal for Computational Civil and Structural Engineering Pub Date : 2022-09-27 DOI: 10.22337/2587-9618-2022-18-3-95-113

N. Perminov, R. Mangushev

{"title":"MODELING AND MONITORING OF STRUCTURAL SAFETY OF LONG-OPERATING UNDERGROUND STRUCTURES OF THE SEWAGE SYSTEM IN THE CONDITIONS OF INCREASING ANTHROPOGENIC ACTIONS IN ORDER TO PROVIDE SUSTAINABLE LIFECYCLE OF ENGINEERING INFRASTRUCTURE OF THE MEGACITY (THE EXPERIENCE OF ST. PETERSBURG)","authors":"N. Perminov, R. Mangushev","doi":"10.22337/2587-9618-2022-18-3-95-113","DOIUrl":"https://doi.org/10.22337/2587-9618-2022-18-3-95-113","url":null,"abstract":"Long-term operation in difficult engineering-geological conditions of unique underground sewage facilities creates the danger of violating their structural safety. A long-term study of the dynamics of changes in a technical state of large pumping stations and deep sewage tunnels made it possible to establish patterns of influence of intensive anthropogenic and dynamic actions on this process. The developed discrete and continuous diagnostic models of defect development in tunnel structures allow identifying potentially hazardous areas subjected to manifestation of critical failures and methods of their localization. On the basis of numerical modeling the boundaries of defect-free joint operation of the system “source of impact – geo-mass – sewage underground structure” have been determined. The geotechnical and structural calculations are used to simulate the interaction of the facilities with the soil environment and predict adaptive stress-strain control system parameters. With increasing external anthropogenic and dynamic impacts, modeling zones of urban areas with potentially dangerous sections of underground sewage facilities constitute the basis for development of regulatory documents on monitoring methods and safe development of the geotechnical infrastructure of a megacity.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77634540","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}

引用次数: 0

ANALYSIS OF THE FILTRATION PROBLEM BY BITWISE SEARCH METHOD 位搜索法过滤问题的分析

International Journal for Computational Civil and Structural Engineering Pub Date : 2022-09-27 DOI: 10.22337/2587-9618-2022-18-3-86-94

L. Kuzmina, Y. Osipov, M. Astakhov

引用次数: 1

СONTROL OF A NONLOCAL IN TIME FINITE ELEMENT MODEL OF THE DYNAMIC BEHAVIOR OF A COMPOSITE BEAM BASED ON THE RESULTS OF A NUMERICAL EXPERIMENT 本文基于数值实验结果建立了复合梁动力特性的非局部时间有限元模型Сontrol

International Journal for Computational Civil and Structural Engineering Pub Date : 2022-09-27 DOI: 10.22337/2587-9618-2022-18-3-78-85

V. Sidorov, Elena Detina, E. Badina

引用次数: 0

SIMPLIFIED MODEL FOR DETERMINING THE STRESS-STRAIN STATE IN MASSIVE MONOLITHIC FOUNDATION SLABS DURING CONSTRUCTION 大型单片基础施工过程中应力-应变状态的简化模型

International Journal for Computational Civil and Structural Engineering Pub Date : 2022-09-27 DOI: 10.22337/2587-9618-2022-18-3-126-136

A. Chepurnenko, G. Nesvetaev, Yuliya Koryanova, B. Yazyev

{"title":"SIMPLIFIED MODEL FOR DETERMINING THE STRESS-STRAIN STATE IN MASSIVE MONOLITHIC FOUNDATION SLABS DURING CONSTRUCTION","authors":"A. Chepurnenko, G. Nesvetaev, Yuliya Koryanova, B. Yazyev","doi":"10.22337/2587-9618-2022-18-3-126-136","DOIUrl":"https://doi.org/10.22337/2587-9618-2022-18-3-126-136","url":null,"abstract":"The article proposes the simplified method for determining stresses in massive monolithic foundation slabs arising from the heat release of concrete during the hardening process. The proposed technique makes it possible to reduce a three-dimensional problem to a one-dimensional one based on the features of the distribution of stresses and strains in the structures under consideration, identified during finite element modeling in a three-dimensional setting. The resulting resolving equations take into account the creep and shrinkage of concrete, the coefficient of reinforcement of the structure. The strength and deformation characteristics of concrete are assumed as functions of the degree of maturity of the concrete, which in turn is determined by the time and temperature of curing. Approbation of the developed model is carried out by comparison with the calculation in a three-dimensional setting in the ANSYS software package. The influence of creep and contraction shrinkage of concrete, the degree of concrete maturity and the coefficient of reinforcement on the stress-strain state of structures is investigated.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86749614","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}

引用次数: 3

FINITE ELEMENT ANALYSIS FOR THIN-WALLED MEMBER SUBJECTED TO COMBINED LOADING 组合式薄壁构件有限元分析

International Journal for Computational Civil and Structural Engineering Pub Date : 2022-09-27 DOI: 10.22337/2587-9618-2022-18-3-65-77

V. Galishnikova, T. Gebre

{"title":"FINITE ELEMENT ANALYSIS FOR THIN-WALLED MEMBER SUBJECTED TO COMBINED LOADING","authors":"V. Galishnikova, T. Gebre","doi":"10.22337/2587-9618-2022-18-3-65-77","DOIUrl":"https://doi.org/10.22337/2587-9618-2022-18-3-65-77","url":null,"abstract":"Thin-walled structures are widely used in various structural engineering applications due to their advantage of high bearing strength when compared to self-weight and used in a complex loading situation where subjected to combined loadings. When a thin-walled section is subjected to a combined load with restrained torsion, they are ineffective at resisting, resulting in a reduction in beam capacity due to torsion and additional warping stresses. A finite element calculation can be used to analyze a 3D bar of thin-walled structural sections. Different commercial software and studies commonly consider six degrees of freedom at each node of a member for a space frame without considering the effect of warping restraint at the member's ends. This paper presents a finite element calculation for thin-walled sections with restrained torsion using the 14x14 member stiffness matrix, which includes warping as an additional degree of freedom and is commonly used for open thin-walled sections. In this study, we considered two different methods for including the additional degree of freedom for the stiffness matrix, which are very close to each other for small values of characteristics number.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"67 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76534209","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}

引用次数: 0

NUMERICAL SIMULATION OF THE PROCESS OF DIRECTED TRANSFORMATION OF A REGULAR HINGE-ROD SYSTEM 规则铰杆系统定向变换过程的数值模拟

International Journal for Computational Civil and Structural Engineering Pub Date : 2022-09-27 DOI: 10.22337/2587-9618-2022-18-3-14-24

P. Gaydzhurov, N. Tsaritova, A. Kurbanov, Anastasia Kurbanova, E. Iskhakova

引用次数: 0

OPTIMIZATION OF BEARING STRUCTURES SUBJECT TO MECHANICAL SAFETY: AN EVOLUTIONARY APPROACH AND SOFTWARE 基于机械安全的轴承结构优化:一种进化方法和软件

International Journal for Computational Civil and Structural Engineering Pub Date : 2022-06-24 DOI: 10.22337/2587-9618-2022-18-2-131-142

A. Alekseytsev, Al Ali Mohamad

{"title":"OPTIMIZATION OF BEARING STRUCTURES SUBJECT TO MECHANICAL SAFETY: AN EVOLUTIONARY APPROACH AND SOFTWARE","authors":"A. Alekseytsev, Al Ali Mohamad","doi":"10.22337/2587-9618-2022-18-2-131-142","DOIUrl":"https://doi.org/10.22337/2587-9618-2022-18-2-131-142","url":null,"abstract":"An approach to solving the urgent problem of optimizing the load-bearing structures of buildings and structures based on adapted genetic algorithms is presented. As a tool for finding a solution, iterative schemes are used, in which, in the classical approach to evolutionary modeling, a system of constraints is used that forms the operational requirements for reinforced concrete, steel and other structures. In this case, the value of the risk of material losses is used as one of the measures of the design optimality. This value is used to assess the feasibility of increasing the initial costs of manufacturing structures, taking into account the degree of their mechanical safety in case of emergency impacts. Groups of scenarios are considered as such impacts, including local damage to one or more load-bearing elements. A limitation is formed on the resistance to progressive collapse of the structure, which is interpreted as preventing large displacements and limiting deformations of certain parts or the structure as a whole. The magnitude of the risk is determined by a relative index determined as the ratio of the likely cost for damage from material loss to the initial cost of manufacturing the structure. The block diagrams that implement such iterative processes, information about the developed software and an example of optimization of the reinforced concrete supporting structure of the frame of an administrative multi-storey building are considered.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86813143","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}

引用次数: 1

STRENGTH MODEL FOR CALCULATING CENTRALLY COMPRESSED CONCRETE ELEMENTS WITH COMPOSITE REINFORCEMENT, TAKING INTO ACCOUNT THE SPACING OF STIRRUPS 考虑箍筋间距的组合配筋中心受压混凝土单元强度计算模型

International Journal for Computational Civil and Structural Engineering Pub Date : 2022-06-24 DOI: 10.22337/2587-9618-2022-18-2-163-174

A. Tamrazyan, Andrey Lapshinov

{"title":"STRENGTH MODEL FOR CALCULATING CENTRALLY COMPRESSED CONCRETE ELEMENTS WITH COMPOSITE REINFORCEMENT, TAKING INTO ACCOUNT THE SPACING OF STIRRUPS","authors":"A. Tamrazyan, Andrey Lapshinov","doi":"10.22337/2587-9618-2022-18-2-163-174","DOIUrl":"https://doi.org/10.22337/2587-9618-2022-18-2-163-174","url":null,"abstract":"The article discusses the relevance of developing techniques for confined elements with FRP reinforcement. The method for calculating centrally confined concrete columns with non-metallic GFRP reinforcement (without regard to its compression work) is proposed for the first time in the Russian Federation. The strength model was developed based on the well-known theoretical model of confined concrete. The article considers the effect of strengthening the concrete core of the columns, which is obtained due to the more frequent placement of both transverse and longitudinal reinforcement. The dependence of the bearing capacity of concrete columns on the strength of the transverse reinforcement material is shown. It was proved that with a decrease in the spacing of the longitudinal reinforcement, the area of the effectively confined concrete core inside the reinforcement cage increases. It was shown that, due to the low compressive modulus of elasticity of the FRP reinforcement, the stress in it will be comparable to the concrete stress. Therefore, the compressive strength of the FRP reinforcement can be neglected in the case of determining the bearing capacity of centrally confined concrete elements. As a result, a strength model for calculating confined concrete elements with FRP reinforcement was proposed, considering the spacing of transverse reinforcement, the longitudinal and transverse reinforcement ratio, and the strength of the material of transverse reinforcement. The developed strength model can be applied not only for square, but also for columns of round and rectangular sections.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88973733","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}

引用次数: 0

THE USE OF COPPER NANOMODIFIED CALCIUM CARBONATE AS A BACTERICIDAL ADDITIVE FOR CONCRETE 用铜纳米改性碳酸钙作为混凝土的杀菌添加剂

International Journal for Computational Civil and Structural Engineering Pub Date : 2022-06-24 DOI: 10.22337/2587-9618-2022-18-2-143-155

K. Sharafutdinov, K. Saraykina, G. Kashevarova, V. Erofeev

引用次数: 0

DETERMINATION OF BENDING OF A BEAM FROM A NONLINEAR DEFORMABLE MATERIAL BY RITZ-TIMOSHENKO METHODS AND FINITE DIFFERENCES TAKING INTO ACCOUNT DEGRADATION FUNCTIONS OF CROSS SECTION RIGIDITY 考虑截面刚度退化函数的ritz-timoshenko方法和有限差分法测定非线性变形材料梁的弯曲

International Journal for Computational Civil and Structural Engineering Pub Date : 2022-06-24 DOI: 10.22337/2587-9618-2022-18-2-85-97

V. Selyaev, Sergey Gryaznov, D. Babushkina

引用次数: 0