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International Journal for Computational Civil and Structural Engineering最新文献

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MATHEMATICAL MODELING AND EXPERIMENTAL INVESTIGATION OF THE PROCESS OF NON-STATIONARY HEAT TRANSFER IN A BLOCK FOAM GLASS SAMPLE AT THE ANNEALING STAGE 块状泡沫玻璃试样退火阶段非稳态传热过程的数学建模与实验研究
International Journal for Computational Civil and Structural Engineering Pub Date : 2023-03-29 DOI: 10.22337/2587-9618-2023-19-1-190-203
{"title":"MATHEMATICAL MODELING AND EXPERIMENTAL INVESTIGATION OF THE PROCESS OF NON-STATIONARY HEAT TRANSFER IN A BLOCK FOAM GLASS SAMPLE AT THE ANNEALING STAGE","authors":"","doi":"10.22337/2587-9618-2023-19-1-190-203","DOIUrl":"https://doi.org/10.22337/2587-9618-2023-19-1-190-203","url":null,"abstract":"The specifics of the technology for the production of block foam glass are presented, the results of experimental studies of the properties of the material are presented, a method for improving production based on mathematical modeling of heat transfer processes is proposed. It is shown that the processes of high-temperature processing of foam glass make a key contribution to the formation of a high-quality porous structure, therefore, this area of ​​research needs the development of adequate methods for calculating the main macrophysical parameters based on the theory of heat transfer. A technique for checking the adequacy of the mathematical model of heat transfer is presented using the example of spontaneous cooling of a foam glass block. The entire procedure for checking the adequacy of the mathematical model was carried out in three stages. At the first stage, the degree of validation of the model is assessed, functional dependencies with the results of an experimental study based on the Pearson determination coefficient. The main stage includes the evaluation of the confidence intervals of the experimental data and the discussion of the convergence of the results of the analytical calculation with the results of the experimental data. The final stage, at which a comprehensive assessment of the adequacy of the mathematical model is given, includes both the results of the preparatory and the main stages. The results of the study showed that it can be concluded that the calculated data have sufficient convergence with the experimental data and indicate the adequacy of the developed mathematical model of heat transfer.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77327373","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
COMPARISON OF PHYSICAL AND MECHANICAL TEST METHODS FOR COARSE AGGREGATE ACCORDING TO THE EGYPTIAN AND RUSSIAN STANDARD METHODS 按埃及和俄罗斯标准方法进行粗集料物理和力学试验方法的比较
International Journal for Computational Civil and Structural Engineering Pub Date : 2023-03-29 DOI: 10.22337/2587-9618-2023-19-1-41-54
K. Yousri, D. Korotkikh, D. Kapustin
{"title":"COMPARISON OF PHYSICAL AND MECHANICAL TEST METHODS FOR COARSE AGGREGATE ACCORDING TO THE EGYPTIAN AND RUSSIAN STANDARD METHODS","authors":"K. Yousri, D. Korotkikh, D. Kapustin","doi":"10.22337/2587-9618-2023-19-1-41-54","DOIUrl":"https://doi.org/10.22337/2587-9618-2023-19-1-41-54","url":null,"abstract":"Physical and mechanical test methods for coarse aggregate have been studied under the commercial program of Egyptian and Russian standard test methods comparison. Theoretical and practical research has been carried out using Egyptian raw materials from reputed occurrences. The research shows that the main part of tests is either the same or comparable, which can make the quality assessment easier for both sides provided that the converting rules are followed. Recalculating methods for important geometrical and mechanical properties are proposed. Converting tables, graphics and Russian standards are provided in order to assist Egyptian suppliers with participating in tendering for Al Dabaa NPP project.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"105 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85038799","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
INFINITESIMAL AND FINITE DEFORMATIONS IN THE POLAR COORDINATE SYSTEM 极坐标系统中的无穷小和有限变形
International Journal for Computational Civil and Structural Engineering Pub Date : 2023-03-29 DOI: 10.22337/2587-9618-2023-19-1-204-211
{"title":"INFINITESIMAL AND FINITE DEFORMATIONS IN THE POLAR COORDINATE SYSTEM","authors":"","doi":"10.22337/2587-9618-2023-19-1-204-211","DOIUrl":"https://doi.org/10.22337/2587-9618-2023-19-1-204-211","url":null,"abstract":"The deformation problem of elasticity theory with regard to nonlinear deformations is examined. The expressions of deformations through displacements in the orthogonal curvilinear coordinate system are recorded. The relations for finite deformations in cylindrical and polar coordinate systems are derived. Physical relations for finite deformations and corresponding generalized stresses are recorded.              \u0000 ","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72674525","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
ЧИСЛЕННАЯ РЕАЛИЗАЦИЯ ВЗАИМОДЕЙСТВИЯ ГРАВИТАЦИОННЫХ ВОЛН С ОГРАДИТЕЛЬНЫМИ СООРУЖЕНИЯМИ МОРСКОГО ПОРТА 重力波与海港围栏结构相互作用的数值实现
International Journal for Computational Civil and Structural Engineering Pub Date : 2023-03-29 DOI: 10.22337/2587-9618-2023-19-1-55-68
И. Г. Кантаржи, Александр Гогин
{"title":"ЧИСЛЕННАЯ РЕАЛИЗАЦИЯ ВЗАИМОДЕЙСТВИЯ ГРАВИТАЦИОННЫХ ВОЛН С ОГРАДИТЕЛЬНЫМИ СООРУЖЕНИЯМИ МОРСКОГО ПОРТА","authors":"И. Г. Кантаржи, Александр Гогин","doi":"10.22337/2587-9618-2023-19-1-55-68","DOIUrl":"https://doi.org/10.22337/2587-9618-2023-19-1-55-68","url":null,"abstract":"Работа посвящена методу численного моделирования взаимодействия морских ветровых волн с оградительными сооружениями морского порта. Представлена классификация существующих численных волновых моделей в зависимости от их точности и требованиям к вычислительной мощности компьютера. В статье основным исследуемым эффектом взаимодействия волн с гидротехническими сооружениями порта является дифракция волн на защищаемой акватории. Для ее консервативного исследования в работе используется тестовая задача – два сходящихся оградительных сооружения на плоском дне с варьированием шириной входного створа и периодом подходящих волн. Тестовая задача физически смоделирована в волновом бассейне, а также численно с помощью волновой модели Буссинеска, реализованной в ПК MIKE 21. В рамках настройки численной модели предложен и обоснован наиболее корректный способ воспроизведения оградительных сооружений на численной модели – с отказом от ограждающей поглощающие слои стенки со стороны входного створа и постепенным уменьшением коэффициентов поглощения к входному створу. В результате сравнения результатов численного и физического моделирования получено удовлетворительное совпадение с разбросом значений 10-15%. Это позволило сделать вывод о том, что предложенный способ реализации оградительных сооружений позволяет корректно рассчитать дифракцию волн на защищаемой акватории, а используемую волновую модель считать верифицированной результатами физических экспериментов.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77589198","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
HYDRODYNAMIC STABILITY OF SWIRLING FLOWS WITH AXIAL RECIRCULATION ZONES 轴向再循环带旋流的流体动力稳定性
International Journal for Computational Civil and Structural Engineering Pub Date : 2023-03-29 DOI: 10.22337/2587-9618-2023-19-1-14-22
V. Akhmetov
{"title":"HYDRODYNAMIC STABILITY OF SWIRLING FLOWS WITH AXIAL RECIRCULATION ZONES","authors":"V. Akhmetov","doi":"10.22337/2587-9618-2023-19-1-14-22","DOIUrl":"https://doi.org/10.22337/2587-9618-2023-19-1-14-22","url":null,"abstract":"The problem of the motion of a viscous incompressible swirling flow in an axisymmetric channel has been numerically investigated. Various flow regimes have been obtained, including those with the formation of the axial recirculation zones. In the framework of linear theory, the stability of the obtained calculated flows with respect to non-axisymmetric perturbations is investigated on the assumption of local parallelism. The growth rates and phase velocities of unstable disturbances are calculated. In the presence of a reverse flow zone, the disturbances growth rates are increased significantly.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80775895","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
ASSESSMENT OF WEIGHT OF SEDIMENT FORMATION DEPOSIT IN MUNICIPAL COLLECTOR SYSTEM (MCS) 城市集水系统中形成沉积物重量评价
International Journal for Computational Civil and Structural Engineering Pub Date : 2023-03-29 DOI: 10.22337/2587-9618-2023-19-1-23-31
{"title":"ASSESSMENT OF WEIGHT OF SEDIMENT FORMATION DEPOSIT IN MUNICIPAL COLLECTOR SYSTEM (MCS)","authors":"","doi":"10.22337/2587-9618-2023-19-1-23-31","DOIUrl":"https://doi.org/10.22337/2587-9618-2023-19-1-23-31","url":null,"abstract":"The main purpose of this work is to provide calculations of annual weight of sediment formation deposit in Municipal Collector System (MCS). The article considers two-phases flow in the collector. The storm water collector is small culvert for storm water (rainwater) or for removing the river (creek, stream, flow) underground. The article defines the solid particles in flow as sand, clay, stones, silt, etc. It was found that in case of significant flow rate, then all solid particles move in the pipe. If not, they settle to the bottom and sediment is formed. In this paper, total weight of sediment formation in Moscow collector system is calculated at average annual values. On this ground a consideration can be made that sediment deposit reduces efficiency of the system partially or completely.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86482289","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
CONTROL SYSTEM OF PARAMETERS OF ELECTRICAL CURING OF CAST-IN-SITU REINFORCED CONCRETE STRUCTURES 现浇钢筋混凝土结构电养护参数控制系统
International Journal for Computational Civil and Structural Engineering Pub Date : 2023-03-29 DOI: 10.22337/2587-9618-2023-19-1-85-96
{"title":"CONTROL SYSTEM OF PARAMETERS OF ELECTRICAL CURING OF CAST-IN-SITU REINFORCED CONCRETE STRUCTURES","authors":"","doi":"10.22337/2587-9618-2023-19-1-85-96","DOIUrl":"https://doi.org/10.22337/2587-9618-2023-19-1-85-96","url":null,"abstract":"At the moment in house-building industry cases of increase of efficiency of cast-in-situ concrete structures electrical curing are insufficiently studied. Development and implementation of control systems of parameters of electrical curing can be solve of current concerns. Development sequence of this control system included: collection of initial data; development of virtual model of considered structures, using ELCUT; analysis of rate of simulation parameters, depend on ambient conditions; fixation of values of simulation parameters; development of mathematical model of correlation between transformer voltage and temperatures of concrete, ambient air and time of electrical curing; development and description of circuit diagram of proposed control system. \u0000The control system, developed by the authors, can be the basis for creation of automated complex of electrical curing of cast-in-situ reinforced concrete structures. Application of this system will significantly allow to decrease electricity consumption and labor costs, connected with electrical curing of structures.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"355 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76493833","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
LOCAL STABILITY AND NATURAL MOTIONS OF THE MULTI-FACE DOME ROD STRUCTURE 多面穹顶杆结构的局部稳定性与自然运动
International Journal for Computational Civil and Structural Engineering Pub Date : 2023-03-29 DOI: 10.22337/2587-9618-2023-19-1-32-40
D. Zhuravlev, A. Zhuravlev
{"title":"LOCAL STABILITY AND NATURAL MOTIONS OF THE MULTI-FACE DOME ROD STRUCTURE","authors":"D. Zhuravlev, A. Zhuravlev","doi":"10.22337/2587-9618-2023-19-1-32-40","DOIUrl":"https://doi.org/10.22337/2587-9618-2023-19-1-32-40","url":null,"abstract":"The research  object is a cyclically symmetric construction of a two-tier dome in the form of a convex polyhedron. Load and deflection critical parameters were determined for this construction pyramidal element. The behavior features of the conservative system in the dome's central assembly vertical displacement critical region value analysis has been carried out. The elastic rod model  fluctuating and construction deviations from its equilibrium state reaction have been researched. System's behavior at natural motions and nonlinear restoring force is refined on the base of the findings carried out.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"425 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84941560","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
TIME ANALYSIS OF A CONSTRUCTIVELY NONLINEAR SYSTEM WITH ONE-WAY CONNECTIONS 单向连接构造非线性系统的时间分析
International Journal for Computational Civil and Structural Engineering Pub Date : 2023-03-29 DOI: 10.22337/2587-9618-2023-19-1-135-146
{"title":"TIME ANALYSIS OF A CONSTRUCTIVELY NONLINEAR SYSTEM WITH ONE-WAY CONNECTIONS","authors":"","doi":"10.22337/2587-9618-2023-19-1-135-146","DOIUrl":"https://doi.org/10.22337/2587-9618-2023-19-1-135-146","url":null,"abstract":"An active method of suppressing wind auto-oscillations of an overground gas pipeline model is considered, which allows the system to be tuned from the resonant frequency by changing its design scheme with the help of a vibration damping device operating on the principle of one-way con-nection (OWC). A new mathematical model of vibrations with a symmetric form of natural vibrations of the system is proposed. Variants of vibration models with one and two OWC, located in the central span of the design scheme of the gas pipeline, are considered. The implementation of a non-stationary dynam-ic process is carried out within the framework of the theory of temporal analysis for a model of an over-ground gas pipeline in the form of a multi-span continuous beam with point masses located in the design sections of the model. The equation of motion is presented in the matrix form of the Duhamel integral, taking into account internal friction, which follows the disproportionate damping model. Computer simu-lation of the problem for a system with 39 degrees of freedom is carried out. The kinematic and force pa-rameters of the dynamic response of the dissipative system are obtained, a comparative analysis of the proposed oscillation model for the design models with one and two OWC is given, and the efficiency of the model with two OWC is shown.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86022416","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
МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ НЕДРЕНИРОВАННОГО ПОВЕДЕНИЯ ГРУНТОВ 地下无水行为数学模拟
International Journal for Computational Civil and Structural Engineering Pub Date : 2023-03-29 DOI: 10.22337/2587-9618-2023-19-1-97-111
Рашид Александрович Мангушев, И С Башмаков, Дарья Паскачева, Алина Квашук
{"title":"МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ НЕДРЕНИРОВАННОГО ПОВЕДЕНИЯ ГРУНТОВ","authors":"Рашид Александрович Мангушев, И С Башмаков, Дарья Паскачева, Алина Квашук","doi":"10.22337/2587-9618-2023-19-1-97-111","DOIUrl":"https://doi.org/10.22337/2587-9618-2023-19-1-97-111","url":null,"abstract":"Выполнено математическое моделирование недренированного поведения грунтов на основе теоретических траекторий эффективных напряжений при недренированном девиаторном загружении в камере трехосного сжатия.  Проанализированы рекомендации нормативных источников и научных трудов о применении недренированных расчетов в практике. Рассмотрены основные законы механики грунтов при расчетах с учетом образования избыточных поровых давлений в основании. Для математического моделирования траекторий применены теоретические выкладки, полученные А. Скемптоном для закона эффективных напряжений К. Терцаги. На основе результатов математического моделирования идеально-упруго-пластического тела показано, что точное описание траектории эффективных напряжений грунта с помощью теории упругости не соответствует реальным испытаниям грунтов. Проанализировано влияние закона объемного пластического деформирования на траекторию эффективных напряжений и на сопротивление недренированному сдвигу. Представлена формула определения параметра недренированной прочности для модели Modified Cam Clay. Обращается внимание на то, что кроме объемного пластического деформирования, влияющего на недренированный расчет, необходимо учитывать сдвиговую составляющую пластических деформаций, являющуюся определяющей для расчетов котлованов. Выполнено моделирование лабораторных испытаний грунтов в ПК «Soil Test» для моделей Мора-Кулона, Modified Cam Clay и Hardening Soil Model. Представлено сравнение полученных результатов с данными лабораторных испытаний. Показано влияние выбора модели грунта на значение сопротивления недренированному сдвигу. Даны рекомендации для выбора модели грунта для численного моделирования на основании результатов лабораторных трехосных консолидированно-недренированных испытаний.","PeriodicalId":36116,"journal":{"name":"International Journal for Computational Civil and Structural Engineering","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73173802","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
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