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Ovidius University Annals of Constanta - Series Civil Engineering最新文献

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Installation for Producing Mechanical Vibrations used in the Finishing of the Welded Joints Structure 焊接接头结构精加工中产生机械振动的装置
Ovidius University Annals of Constanta - Series Civil Engineering Pub Date : 2020-12-01 DOI: 10.2478/ouacsce-2020-0009
B. Novac
{"title":"Installation for Producing Mechanical Vibrations used in the Finishing of the Welded Joints Structure","authors":"B. Novac","doi":"10.2478/ouacsce-2020-0009","DOIUrl":"https://doi.org/10.2478/ouacsce-2020-0009","url":null,"abstract":"Abstract The paper presents a constructive version of a mechanical vibration generator designed to be used at stress relieving of welded joints. This installation can be used on all brands of steels and welded joints, whether they have magnetic properties or not. In the generator construction a DC motor was used, in order to be able to adjust the speed more easily. The speed adjustment is made with a potentiometer, and the speed measurement is made with a tachometer. The tachometer measures the speeds based on the pulses given by a four-pointed cam rotating between the plates of a capacitor. The vibration system also contains a piezoelectric accelerograph, which is attached to the welded part subjected to vibration, in order to measure the level of vibration and the parameters of the vibration wave.","PeriodicalId":345086,"journal":{"name":"Ovidius University Annals of Constanta - Series Civil Engineering","volume":"7 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120864212","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
Role of the Government for Development of Sustainable Construction 政府在可持续建筑发展中的作用
Ovidius University Annals of Constanta - Series Civil Engineering Pub Date : 2020-12-01 DOI: 10.2478/ouacsce-2020-0006
A. Marichova
{"title":"Role of the Government for Development of Sustainable Construction","authors":"A. Marichova","doi":"10.2478/ouacsce-2020-0006","DOIUrl":"https://doi.org/10.2478/ouacsce-2020-0006","url":null,"abstract":"Abstract In the last years questions related to sustainable development are particularly relevant. The construction market is usually identified as the first sector to face serious problems and requires special attention in implementing the idea. The main reasons for this assessment lie in the specifics of construction as an economic activity, the specifics of the construction product, the construction process, the specifics of organization and management of the construction company and the strong economic, social and environmental effect. The purpose of the proposed study is: 1) analysis of the problem of sustainability of the construction market, 2) the role and influence of the government for the development of sustainable construction.","PeriodicalId":345086,"journal":{"name":"Ovidius University Annals of Constanta - Series Civil Engineering","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131314822","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: 2
Systems to Protect and Improve the Behavior of Buildings Located In Macroporous Lands Susceptible to Wetting 保护和改善位于易受潮湿影响的大孔隙土地上的建筑物行为的系统
Ovidius University Annals of Constanta - Series Civil Engineering Pub Date : 2020-12-01 DOI: 10.2478/ouacsce-2020-0012
B. D. Pericleanu, M. Pericleanu, A. Grămescu
{"title":"Systems to Protect and Improve the Behavior of Buildings Located In Macroporous Lands Susceptible to Wetting","authors":"B. D. Pericleanu, M. Pericleanu, A. Grămescu","doi":"10.2478/ouacsce-2020-0012","DOIUrl":"https://doi.org/10.2478/ouacsce-2020-0012","url":null,"abstract":"Abstract Macroporous lands sensitive to wetting represent a category of sites with high vulnerability during construction exploitation. In this regard an effective measure is the protective shielding measures against the main factors influencing its behavior. The paper deals with a complex case study by both its importance functions and the fact that the objective analyzed is a part of historical monuments of particular value to the local community, namely the water tower in Braila Public Garden - România.","PeriodicalId":345086,"journal":{"name":"Ovidius University Annals of Constanta - Series Civil Engineering","volume":"298 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114575200","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
Comparative Analysis by Mathematical Modeling and Simulation of the Two Thermal Systems Using Solar Radiation as a Source of Energy 以太阳辐射为能源的两种热系统的数学建模与仿真比较分析
Ovidius University Annals of Constanta - Series Civil Engineering Pub Date : 2020-12-01 DOI: 10.2478/ouacsce-2020-0011
P. Toma
{"title":"Comparative Analysis by Mathematical Modeling and Simulation of the Two Thermal Systems Using Solar Radiation as a Source of Energy","authors":"P. Toma","doi":"10.2478/ouacsce-2020-0011","DOIUrl":"https://doi.org/10.2478/ouacsce-2020-0011","url":null,"abstract":"Abstract This paper presents comparative analysis by mathematical modeling and simulation of two thermal systems for hot water production consisting of solar collectors and storage tank with and without inbuilt heat exchanger. Thermal hot water systems use solar radiation as the source of energy, and mathematical models of their simulation are developed in Scilab-Xcos. An example of simulation of these thermal systems is also presented in this paper.","PeriodicalId":345086,"journal":{"name":"Ovidius University Annals of Constanta - Series Civil Engineering","volume":"58 42","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120885733","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
Researches on the Welding Behaviour of Two Brands of High-Alloy and High-Efficiency Electrodes Used to Charge High Wear Parts 高磨损件充电用两种高合金高效电极的焊接性能研究
Ovidius University Annals of Constanta - Series Civil Engineering Pub Date : 2020-12-01 DOI: 10.2478/ouacsce-2020-0008
Mariana Neli Novac, B. Novac
{"title":"Researches on the Welding Behaviour of Two Brands of High-Alloy and High-Efficiency Electrodes Used to Charge High Wear Parts","authors":"Mariana Neli Novac, B. Novac","doi":"10.2478/ouacsce-2020-0008","DOIUrl":"https://doi.org/10.2478/ouacsce-2020-0008","url":null,"abstract":"Abstract The research performed and presented in this paper, aims to verify the welding behavior of electrodes developed experimentally, as well as the possibility of their use in production. A group of two electrodes produced by Bohler Company, Gridur 24 and B.M.N were taken as reference, in order to compare them in terms of the mechanical properties of the deposited metal, with the experimentally developed electrodes EICr12Fe and EIMn13SiFe. They were made determinations of the chemical composition of the deposited metal with the two types of electrodes, measurements regarding the hardness of the metal deposited, comparative determinations of the structure of the weld deposit, and of the welding penetration, determinations of the deposition yield and verification of the welding behavior.","PeriodicalId":345086,"journal":{"name":"Ovidius University Annals of Constanta - Series Civil Engineering","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125266461","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
Research on Improving the Welding Behaviour of Stainless Steels in the Field of Welded Constructions by Using Mechanical Vibrations 利用机械振动改善焊接结构领域不锈钢焊接性能的研究
Ovidius University Annals of Constanta - Series Civil Engineering Pub Date : 2020-12-01 DOI: 10.2478/ouacsce-2020-0007
B. Novac
{"title":"Research on Improving the Welding Behaviour of Stainless Steels in the Field of Welded Constructions by Using Mechanical Vibrations","authors":"B. Novac","doi":"10.2478/ouacsce-2020-0007","DOIUrl":"https://doi.org/10.2478/ouacsce-2020-0007","url":null,"abstract":"Abstract This paper presents a research that has been done on two types of stainless steels, one of Spanish origin and the other of Romanian origin. Both Spanish and Romanian stainless steels have been subjected to several tests, regarding the influence of vibrations on their mechanical properties and their welding behavior. The samples were made of welded stainless steels. They were subjected to a thermal hardening treatment at a temperature of 950 degrees, with a holding time of 4 hours in the presence of mechanical vibrations. Then comparative tests were performed on both stainless steels at: hardness, tensile test, resilience, microstructural analysis and determination of the longitudinal modulus of elasticity. The research has shown a reduction of the thermo-mechanically influenced area, which contributes to the achievement of a high quality welded joints.","PeriodicalId":345086,"journal":{"name":"Ovidius University Annals of Constanta - Series Civil Engineering","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128871212","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
Integrated Management - a Basic Component for Building a Quality System in Construction 综合管理——建设工程质量体系的基本组成部分
Ovidius University Annals of Constanta - Series Civil Engineering Pub Date : 2019-12-01 DOI: 10.2478/ouacsce-2019-0007
Postavaru Nicolae, Draghici Gabriela, Boiagian Harry Michelle
{"title":"Integrated Management - a Basic Component for Building a Quality System in Construction","authors":"Postavaru Nicolae, Draghici Gabriela, Boiagian Harry Michelle","doi":"10.2478/ouacsce-2019-0007","DOIUrl":"https://doi.org/10.2478/ouacsce-2019-0007","url":null,"abstract":"Abstract From ancient times, mankind needed organization and coordination to be able to carry out its projects. Thus, over time, as requirements grew larger, it naturally emerged the necessity, development and improvement, of the skills of manager, coordinator, of a project team. The paper develops the integrated management concept and tries to apply it for quality system management in construction. This paper uses the method of the synthesis of the studied documents to demonstrate the necessity to implement integrated management.","PeriodicalId":345086,"journal":{"name":"Ovidius University Annals of Constanta - Series Civil Engineering","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126628608","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
Dynamics of the External Environment (Market) and Strategic Behavior of the Construction Firm 外部环境(市场)动态与建筑企业战略行为
Ovidius University Annals of Constanta - Series Civil Engineering Pub Date : 2019-12-01 DOI: 10.2478/ouacsce-2019-0010
A. Marichova
{"title":"Dynamics of the External Environment (Market) and Strategic Behavior of the Construction Firm","authors":"A. Marichova","doi":"10.2478/ouacsce-2019-0010","DOIUrl":"https://doi.org/10.2478/ouacsce-2019-0010","url":null,"abstract":"Abstract The dynamic changes in the external (and often inside) environment place every firm in front of serious new and unknown challenges and make it more difficult to adapt to them. Under these conditions known traditional short-term models of corporate behavior have an increasingly limited role and a chance for success. The main problem and goal of the company should be a clearly defined long-term strategy that allows building competitive advantages and performance. Therefore, the purpose of the study is to analyze the impact of a dynamic external environment (market) on strategic behavior by developing a conceptual model: “Dynamics of the external environment (market) - Strategic behavior - Competitive advantages” to be applied and tested in the activity of the construction firm.","PeriodicalId":345086,"journal":{"name":"Ovidius University Annals of Constanta - Series Civil Engineering","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130673200","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
Study on the Non-Compliant Landfill from Bârlad in Vaslui County 瓦斯鲁伊县煤矸石不合规填埋场的研究
Ovidius University Annals of Constanta - Series Civil Engineering Pub Date : 2019-12-01 DOI: 10.2478/ouacsce-2019-0002
Biali Gabriela, Schneider Petra
{"title":"Study on the Non-Compliant Landfill from Bârlad in Vaslui County","authors":"Biali Gabriela, Schneider Petra","doi":"10.2478/ouacsce-2019-0002","DOIUrl":"https://doi.org/10.2478/ouacsce-2019-0002","url":null,"abstract":"Abstract This paper presents a part of a comprehensive study on non-compliant landfill in Vaslui County. We have been tracking the subsidences taking place in the body of waste dumps and the amount of gas removed to take the best post-closure monitoring measures. In order to trace the behavior regarding the subsidence in the landfill body, there were placed in the ground 11 milestones/topographic landmarks of plastics, painted in white and red to be easily identified visually. Keeping them on the same positions made possible the analysis in the present study. Topographic surveys in the ground were performed once a month between April 2014 and September 2015. The results, interpretations and proposed solutions are presented in this paper.","PeriodicalId":345086,"journal":{"name":"Ovidius University Annals of Constanta - Series Civil Engineering","volume":"192 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116345196","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
Coastal Processes and Longshore Sediment Transport along Zemmouri Bay, Central East Coast of Algeria 阿尔及利亚中东岸泽穆里湾沿岸的海岸过程和沿岸沉积物输运
Ovidius University Annals of Constanta - Series Civil Engineering Pub Date : 2019-12-01 DOI: 10.2478/ouacsce-2019-0001
K. Mezouar, R. Ciortan
{"title":"Coastal Processes and Longshore Sediment Transport along Zemmouri Bay, Central East Coast of Algeria","authors":"K. Mezouar, R. Ciortan","doi":"10.2478/ouacsce-2019-0001","DOIUrl":"https://doi.org/10.2478/ouacsce-2019-0001","url":null,"abstract":"Abstract The coastline of Zemmouri Bay on the northeast coast of Algeria with about 50 km of shoreline has been eroding since 1970. Changes of the sandy shoreline are continuous and occur at diverse spatial and temporal scales. This erosion is a major crisis and it potentially impacts the coastal population and natural environment. In order to understand and predict these morphological changes, an accurate description of sediment transport by waves and currents and shoreline change is important. This paper presents a comprehensive study of wave refraction, current-driven sediment transport and shoreline change. Results show that the study area exhibits a great variety of shoreline evolution trends, with erosion prevailing in the eastern and central sectors and stability or even accretion in the Western area.","PeriodicalId":345086,"journal":{"name":"Ovidius University Annals of Constanta - Series Civil Engineering","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121166341","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
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