Yazarlar

  • MakaleYalnız künye2020Scopus SJRQ2
    Strategy development for the turkish ready-made garment sector using swot analysis – fuzzy topsis method

    Ozbek, Ahmet; Pabuccu, Hakan; Esmer, Yusuf

    The aim of this study was to integrate SWOT analysis and the fuzzy TOPSIS method to develop a strategy for the Turkish RMG sector. SWOT analysis was used to determine the strengths &weaknesses and opportunities & threats of the sector. New strategies were developed using SWOT analysis data, and then the fuzzy TOPSIS method was used to rank the strategies for the sector. Four strategies were determined: (1) building global brands, (2) providing government incentives to increase the competitive power of the sector, (3) effective use of e-commerce, and (4) transforming the sector into an attractive business area for young people. Empirical results indicate that the third strategy is ideal for the sector. However, SWOT analysis falls short of determining strategies for any sector. The ability of strategy making processes to yield positive outcomes depends largely on managers’ participation in decision-making processes. Fuzzy TOPSIS was used to model the inherent uncertainty in human knowledge and behaviour and to incorporate sector managers’ views into the system to assess alternatives that integrate SWOT.

    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    AtıfOpenAlex6
    ScopusWeb of Scienceİncele
  • MakaleAçık Erişim2020Scopus SJRQ2
    A mathematical model and tabu search algorithm for multi-manned assembly line balancing problems with assignment restrictions

    Yilmaz, Hamid; Yilmaz, Mustafa

    A multi-manned assembly line is a set of workstations where task operations can be performed on multiple sides of the line. Such assembly lines are important for large products, such as buses, cars and trucks. In this study, a mathematical model for multi-manned assembly lines with assignment restrictions is proposed. The purpose of the mathematical model is to minimize the total number of workers and open multi-manned workstations along the line for a given cycle time simultaneously under various assignment restrictions. The model provides a more realistic situation for multi-manned assembly line problems. The tabu search algorithm (TSA) is also used to solve the problem. The performances of both methods on well-known data-set problems are analysed. Based on the computational experiments, the performance of the proposed TSA is compared with the mathematical model solutions on various problem instances. The experimental results verify the effectiveness and efficiency of the proposed TSA.

    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    AtıfScopus33WoS28OpenAlex33
    ScopusWeb of Scienceİncele
  • MakaleAçık Erişim2020
    Evaluation of waste management using clustering algorithm in megacity Istanbul

    Guleryuz, Didem

    Industrialization and urbanization are increasing with the effect of globalization worldwide. The waste management problems are rising with the rising population rate, industrialization, and economic developments in the cities, which turned into environmental problems that directly affect human health. This study aims to examine waste management performance in the districts located in the city of Istanbul. To ensure that the districts are clustered in terms of the similarities and differences base on waste management. On this occasion, the authorized unit managers of the districts in the same cluster will be able to establish similar management policies and make joint decisions regarding waste management. In addition, the division of districts into clusters according to the determining indicators can provide information about the locations of waste storage centers. Also, these clusters will form the basis for the optimization constraints required to design appropriate logistics networks. Waste management performance of 39 districts in Istanbul in 2019 was compared by taking into consideration domestic waste, medical waste, population, municipal budget, and mechanical sweeping area. The data were obtained from The Istanbul Metropolitan Municipality (IMM) and Turkey Statistical Institute (TURKSTAT). One of the non-hierarchical clustering methods, the K-means clustering method, was applied using IBM SPSS Modeler data mining software to determine the relations between 39 districts. As a result, the waste management performance of the districts was evaluated according to the statistical data, similarities and differences were revealed by using the determined indicators.

    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    • SDG 11 · Sürdürülebilir Şehirler ve Topluluklar
    • SDG 12 · Sorumlu Üretim ve Tüketim
    AtıfScopus12OpenAlex11TR Dizin1
    ScopusTR Dizinİncele
  • MakaleYalnız künye2020Scopus SJRQ1
    Optimization of an adapted Kalina cycle to an actual municipal solid waste power plant by using NSGA-II method

    Özahi, Emrah; Tozlu, Alperen

    In this paper thermodynamic and thermoeconomic analyses and even optimization of a Kalina cycle (KC) which is adapted to an actual solid waste power plant with a 5.66 MW installed capacity are presented as an alternative solution which is utilized to produce additional power from the exhaust gas of the plant. Up to now there is almost no study related with an adapted KC to a typical municipal solid waste power plant, and also no study based on an optimization, thermodynamic and thermoeconomic analyses of such a system together. All these facts show the novelty of this study. Herein the waste heat with a temperature of 566 °C is utilized by the adapted KC. According to the analyses of the first and second law of thermodynamics on the system, it is deduced that the electricity of 954.6 kW can be produced with the exergy efficiency of 24.15%. Furthermore, this power production can be improved by using non-dominated sorting genetic algorithm method (NSGA-II) in MATLAB software program. According to the optimization study, the deviations of the net power output and the total cost rate are found to be +3.62% and −1.47 $/h, respectively for the cycle.

    • SDG 7 · Erişilebilir ve Temiz Enerji
    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    • SDG 12 · Sorumlu Üretim ve Tüketim
    • SDG 13 · İklim Eylemi
    AtıfScopus45WoS36OpenAlex49
    ScopusWeb of Scienceİncele
  • MakaleAçık Erişim2019
    Güneş Panellerinde Cuk Dönüştürücü Tabanlı Değişken Şartlar Altında D&G, BM ve YSA Algoritmalarının Karşılaştırmalı Performans Analizi

    Güngör, Okan

    Güneş enerjisinden elektrik üretmekte kullanılan PV panellerin verim artırma çalışmaları devametmektedir. Verimi etkileyen unsurların başında MGNT algoritmaları gelmektedir. Bu çalışmada sezgisel(BM, YSA) ve D&G tabanlı MGNT algoritmaları incelenmiştir. Sezgisel algoritmaların uygulanabilmesi içinCuk dönüştürücüye ait denetleç tasarımı Matlab aracılığıyla yapılmıştır. Yapılan benzetim çalışmaları sonucunda, üçfarklı MGNT algoritmasının performans analizleri gösterilmişti

    • SDG 7 · Erişilebilir ve Temiz Enerji
    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    AtıfOpenAlex2TR Dizin1
    TR Dizinİncele
  • MakaleAçık Erişim2019
    An evaluatıon on relocatıon and exproprıatıon problem caused by dam project ın çoruh valley

    Yıldız, Seçil Gül Meydan; Şengün, Hayriye

    Dam Projects occupy a significant part of the public investments in Turkey. The dams have an important role in efficient use of the water as a source of life beside usage of it as a renewable energy source. Physical, social, economical and environmental problems emerge during and after construction of the dams for power generation and irrigation purposes. In order to minimize negative influences of investment projects to be realized by collective expropriation in the scope of public investments, execution of relocation applications additional to expropriation or as an alternative of expropriation procedure has become an inevitable socioeconomical fact. Changing of settlement areas located in the reservoir fields of the dams and expropriation of the affected private lands are leading significant social and physical problems. Relocation of the families whose settlements (properties) are expropriated, the projects applied in new settlement areas, rearrangement of economical and social life are problematic processes taking time and requiring huge economic resources. Beside relocation problems, changes occur in eco systems because of the dams. In this study, relocation and expropriation problems caused by Artvin, Muratlı, Deriner, Borçka and Yusufeli dams which are among the dam Projects in the valley of Çoruh shall be studied using literature review method.

    • SDG 6 · Temiz Su ve Sanitasyon
    • SDG 8 · İnsana Yakışır İş ve Ekonomik Büyüme
    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    • SDG 11 · Sürdürülebilir Şehirler ve Topluluklar
    AtıfOpenAlex2TR Dizin1
    TR Dizinİncele
  • MakaleAçık Erişim2019
    Capacity Factor Analysis in Small Scale Hydropower Plants and a Practice Specific to Giresun

    Serencam, Uğur

    Energy is the fundamental element of social and economic sustainability in every aspect of life, from the smallest living body to large scale industrial facilities. In Turkey rapidly increasing industrial development process lead to extensive energy demand, which is met largely from imported fossil sources. Especially in recent years, as a result of increasing environmental awareness and economic and strategic reasons, a portion of the energy deficit is fed from, clean and reliable hydroelectric power plants with great importance. In our country, a total of 295511 GWh electricity was produced in 2017. About 41368 GWh (14%) of the total amount was generated by large hydraulic plants and 17082 GWh (5.78%) by small hydraulic plants. In this study, small hydroelectric power (SHP) stations are considered to reduce the increasing energy cost and for this purpose SHP in Giresun are analyzed leading to private additives in the capacity factor analysis. According to the results it is possible to conclude that thetime of power plant investment is shortened as the capacity factor increases in hydroelectric power plants.

    • SDG 6 · Temiz Su ve Sanitasyon
    • SDG 7 · Erişilebilir ve Temiz Enerji
    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    • SDG 13 · İklim Eylemi
    AtıfOpenAlex2TR Dizin1
    TR Dizinİncele
  • MakaleAçık Erişim2019
    Efficient Deployment of Energy Antenna for Sensor Nodes with RF Charging

    Tabakcıoğlu, Mehmet Barış; Zorlu, Ahmet; Kosunalp, Selahattin

    A sensor node has processor, antenna, sensor and energy units. A large number of sensor nodes generateswireless sensor network (WSN). The main problem of WSN is limited-energy. A great number of MACprotocols are introduced to compensate the energy problem. In order to supply energy to sensor nodes, anexternal solar panel, wind turbine and energy harvester are added to the architecture of the nodes. Moreover,wireless energy transfer is used to meet the energy problem of sensor node. Position, height and operatingfrequency of energy antenna is so important to charge the sensor nodes efficiently. In this study, ray theoreticalmodels are used to calculate the electric field and generate the coverage map. As the energy antenna is deployedto optimum place, charging will complete in a short time.

    • SDG 7 · Erişilebilir ve Temiz Enerji
    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
  • MakaleAçık Erişim2019
    Design of Asynchronous Motor With 3 Phase 600 kW Power Short Circuit Cage Rotor: Physical Dimensioning and Electrical Calculations

    Kaya, Yunus Mustafa; Coşkun, Aykut

    Asynchronous motors with short circuit caged rotor are easy to build, durable, high operational safety, low maintenance requirements and cheaper than their counterparts, so they are widely used in industry and in many areas. In this study, design of asynchronous motor with short circuit caged rotor with 3 phase, 600 kW active power, mains voltage 400 V, operating frequency 50 Hz, pole pair 2, pole number 4, efficiency 0.95 and power factor 0.93, physical dimensioning and electrical calculations were made. Firstly, main dimensions of motor according to the design criteria and performance values defined, then physical dimensioning of the stator and rotor and electrical calculations, inductions and magnetic field intensities, stator and rotor weights, losses, and efficiency were calculated. The results of the analysis showed that the designed asynchronous motor meets the required power values and design performance criteria.

    • SDG 7 · Erişilebilir ve Temiz Enerji
    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
  • MakaleAçık Erişim2019Scopus SJRQ3
    The relationship between renewable energy consumption and economic growth The case of Bulgaria

    Can, Hamit; Korkmaz, Ozge

    Purpose The purpose of this study is to investigate the relationship between renewable energy and economic growth of Bulgaria. Design/methodology/approach This study analyzes the relationship between renewable energy and economic growth of Bulgaria for the period 1990-2016, based on annual data, by using the Toda-Yamamoto analysis and Autogressive Distrubuted Lag (ARDL) bound test. This period is characterized by the democratization of the Balkans and several crisis cycles in Bulgaria. Renewable energy consumption (REC, percentage of total final energy consumption), renewable electricity output (REO, percentage of total electricity output) and economic growth (GDP constant 2010 US$) were used. The levels or differences of the variables that are stationary were investigated using the augmented Dickey-Fuller (ADF), Philips-Perron (PP) and Kwiatkowski-Philips-Schmidt-Shin (KPSS) unit root tests. Findings Three different results were obtained from this study. One showed that renewable energy consumption and renewable electricity output are the causes of economic growth. Another result of this study is that economic growth and renewable electricity output are the causes of renewable energy consumption. The last result is that economic growth and renewable energy consumption are not causes of renewable electricity output. There was no long-term relationship between variables. Originality/value This study is an original work for Bulgaria, showing the results of the relationship between renewable energy and economic growth. In line with the results of this study, renewable energy projects related to Bulgaria can be predicted.

    • SDG 7 · Erişilebilir ve Temiz Enerji
    • SDG 8 · İnsana Yakışır İş ve Ekonomik Büyüme
    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    AtıfWoS76OpenAlex99
    Web of Scienceİncele
  • MakaleYalnız künye2019Scopus SJRQ1
    Assessment of Alternative Segregation Test Methods for Self-Consolidating Heavyweight Concrete

    Gökçe, H. Suleyman; Aksan, Umut; Andiç-Çakir, Ozge

    This investigation is focused on the use of alternative segregation test methods on high-performance self-consolidating heavyweight concrete. Many segregation test methods have been developed by researchers up to now; however, the disadvantages of these methods, such as being time-consuming, the requirement of excessive labor, and the lack of precision, cannot ensure their worldwide prevalence. In the study, the segregation limitations stated in various test methods, that is, the column test, density variation method, and 3-compartment sieve test, were evaluated on self-consolidating heavyweight concrete produced with barite aggregate. For this purpose, in total, eight self-consolidating heavyweight concrete mixtures designed in two water/binder ratios were prepared by replacing viscosity modifier, silica fume, and fly ash with ordinary Portland cement in different amounts. The mixtures were constituted in satisfactory segregation grades, allowing researchers to evaluate the relationship between those methods. The segregation coefficient limits of the column test, density variation method, and 3-compartment sieve test are recommended as 7%, 1%, and 6.3% for the self-consolidating heavyweight concrete mixtures tested in the study.

    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    AtıfWoS5OpenAlex7
    Web of Scienceİncele
  • MakaleAçık Erişim2019Scopus SJRQ2
    Resource- and content-aware, scalable stitching framework for remote sensing images

    Eken, Süleyman; Mert, Ümit; Koşunalp, Selahattin; Sayar, Ahmet

    This paper proposes a new approach to solving the scalability problem in stitching and registration of satellite images. The image stitching process is mostly utilized to capture an image of an entire object, whose parts fall in separate but overlapping mosaics. Due to their high resolutions and huge sizes, the stitching of satellite mosaic images is time- and resource-consuming process. The work presented in this paper proposes a resource- and content-aware, scalable stitching technique. The main idea is based on measuring and assessing the available hardware resources of the machine, on which stitching process runs, and scaling the resolution of the images accordingly. Moreover, preprocessing is not needed, and the adjustment is performed dynamically at run time. The effectiveness of the proposed technique was assessed by partially registering overlapping satellite mosaic images of the island of Cyprus and Lake Van. The scalability tests are performed on varying numbers and sizes of the overlapping LandSat-8 satellite images.

    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    AtıfScopus8WoS6OpenAlex8
    ScopusWeb of Scienceİncele
  • MakaleAçık Erişim2019Scopus SJRQ3
    A Differential Evolution Algorithm-Based Traffic Control Model for Signalized Intersections

    Cakici, Ziya; Murat, Yetis Sazi

    Sustainable management of traffic flows at signalized intersections is an important issue in terms of traffic engineering. The minimization of lost time, emission, fuel consumption, etc., can be achieved by optimization-based intersection management. In this study, a new traffic signal control model is developed for the management of three-leg signalized intersections. In the proposed model, signal timing and signal phasing are optimized simultaneously using Differential Evolution (DE) algorithm which is one of the population-based metaheuristic algorithms. The effectiveness of the model is tested on sample traffic scenarios with VISSIM simulation software considering average vehicle delay performance criteria. Results show that the proposed approach may reduce the average vehicle delay between the rates of 28%-42% and 3%-38% comparing to the optimum fixed-time signal control and vehicle-actuated signal control for tested scenarios, respectively.

    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    • SDG 11 · Sürdürülebilir Şehirler ve Topluluklar
    AtıfScopus39WoS37OpenAlex39
    ScopusWeb of Scienceİncele
  • MakaleYalnız künye2019Scopus SJRQ2
    Investigation on seismic isolation retrofit of a historical masonry structure

    Artar, Musa; Çoban, Keziban; Yurdakul, Muhammet; Can, Ömer; Yilmaz, Fatih; Yildiz, Mehmet B.

    In this study, seismic vulnerability assessment and seismic isolation retrofit of Bayburt Yakutiye Mosque is investigated. Bayburt Yakutiye Mosque was built in the early 19th century at about 30-meter distance to Coruh river in the center of Bayburt in Turkey. The walls of historical masonry structure were built with regional white and yellow stones and the domes of the mosque was built with masonry bricks. This study is completed in four basic phases. In first phase, experimental determination of the regional white stone used in the historical structure are investigated to determine mechanical properties as modulus of elasticity, poison ratio and compression strengths etc. The required information of the other materials such as masonry brick and the regional yellow stone are obtained from literature studies. In the second phase, three dimensional finite element model (FEM) of the historical masonry structure is prepared with 4738 shell elements and 24789 solid elements in SAP2000 software. In third phase, the vulnerability assessment of the historical mosque is researched under seismic loading such as Erzincan (13 March 1992), Kocaeli (17 August 1999) and Van (23 November 2011) earthquakes. In this phase, the locations where damage can occur are determined. In the final phase, rubber base isolators for seismic isolation retrofit is used in the macro model of historical masonry mosque to prevent the damage risk. The results of all analyses are comparatively evaluated in details and presented in tables and graphs. The results show that the application of rubber base isolators can prevent to occur the destructive effect of earthquakes.

    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    • SDG 11 · Sürdürülebilir Şehirler ve Topluluklar
    AtıfScopus12WoS12OpenAlex6
    ScopusWeb of Scienceİncele
  • MakaleAçık Erişim2019Scopus SJRQ1
    Piezoelectric and electromagnetic hybrid energy harvesting with low-frequency vibrations of an aerodynamic profile under the air effect

    Bolat, Fevzi Cakmak; Basaran, S.; Sivrioglu, S.

    In this study, a novel hybrid energy harvesting system consisting of a piezoelectric material and an electromagnetic induction device is experimentally inevstigated. Flow-induced vibrations can be considered as an aerodynamics air effect and can be converted to electrical energy. By connecting an airfoil profile to a beam element, vibrations are occurred on the proposed structure by creating an aerodynamic air effect. This aerodynamic air effect is controlled by using an Arduino board with a solenoid valve connected to the air line. A piezoelectric transduction is attached on the beam, and an electromagnetic-Lorentz induction is connected to the airfoil element at the end of this beam. Energy is simultaneously harvested by using electromagnetic induction and piezoelectric transduction with respect to the vibration motion of the beam. Within the scope of the study, the amount of energy obtained using the piezoelectric material and Lorentz actuator by connecting resistors of different sizes are measured with an oscilloscope. The experimental results show that the amount of energy obtained from the proposed structure is at promising levels that can be used to run small electronic units which commonly used in aerospace applications.

    • SDG 7 · Erişilebilir ve Temiz Enerji
    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    AtıfScopus60WoS51OpenAlex57
    ScopusWeb of Scienceİncele
  • MakaleAçık Erişim2019
    Impact of Managers’ Innovation Perception on Innovation Activities and Innovation Strategies in Hotel Businesses

    Karakaş, Ayhan; Bilgin, Yusuf; Yildiz, Muhammed Raşit; Bilgin, MH; Danis, H; Demir, E; Can, U

    The purpose of this study is to examine the impact of managers’ innovation perceptions on innovation activities and innovation strategies in hotel business. The research also examined the relationship between innovation types applied in hotel businesses and innovation strategies. Quantitative method was used in the research. The universe of the research constitutes hotel businesses operating in the Western Black Sea Region. Survey data were obtained using questionnaire technique. As a result of the analysis, it is determined that the innovation perceptions of the managers of the hotel businesses has an effect on the types of innovations applied in the businesses. Nevertheless, it has been determined that business managers’ perceptions of innovation have no meaningful effect on innovation strategies applied to the business. In other words, it has been reached that the innovation strategies of the businesses are determined by the variables other than the innovation perceptions of the managers. The research also find that there is a relationship between innovation types applied in hotel businesses and innovation strategies.

    • SDG 8 · İnsana Yakışır İş ve Ekonomik Büyüme
    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    AtıfScopus2WoS2OpenAlex5
    ScopusWeb of Scienceİncele
  • MakaleYalnız künye2019Scopus SJRQ1
    Optimum design of steel space truss towers under seismic effect using Jaya algorithm

    Artar, Musa; Daloğlu, Ayşe T.

    This study investigates optimum designs of steel space truss towers under seismic loading by using Jaya optimization algorithm. Turkish Earthquake Code (2007) specifications are applied on optimum designs of steel space truss towers under the seismic loading for different local site classes depending on different soil groups. The proposed novel algorithm does not have any algorithm-specific control parameters and depends only a simple revision equation. Therefore, it provides a practical solution for structural optimization problems. Optimum solutions of the different steel truss examples are carried out by selecting suitable W sections taken from American Institute of Steel Construction (AISC). In order to obtain optimum solutions, a computer program is coded in MATLAB in corporated with SAP2000-OAPI (Open Application Programming Interface). The stress and displacement constraints are applied on the design problems according to AISC-ASD (Allowable Stress Design) specifications. Firstly, a benchmark truss problem is examined to see the efficiency of Jaya optimization algorithm. Then, two different multi-element truss towers previously solved with other methods without seismic loading in literature are designed by the proposed algorithm. The first space tower is a 582-member space truss with the height of 80 m and the second space tower is a 942-member space truss of about 95 m height. The minimum optimum designs obtained with this novel algorithm for the case without seismic loading are lighter than the ones previously attained in the literature studies. The results obtained in the study show that Jaya algorithm is a practical and robust optimization method for structural optimization problems. Moreover, incorporation of the seismic loading causes significant increase in the minimum design weight.

    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    AtıfScopus15WoS15OpenAlex10
    ScopusWeb of Scienceİncele
  • MakaleYalnız künye2019Scopus SJRQ1
    Dynamic analyses of experimentally-updated FE model of historical masonry clock towers using site-specific seismic characteristics and scaling parameters according to the 2018 Turkey building earthquake code

    Genç, Ali Fuat; Ergün, Mustafa; Günaydin, M.; Altunişik, Ahmet Can; Ateş, Şevket; Okur, Fatih Yesevi; Mosallam, Ayman S.

    This paper presents a dynamic analysis considering site-specific seismic characteristics for a masonry clock tower located at the city of Çorum, Turkey according to the new Turkish earthquake code. Finite element model of the tower was modeled using ANSYS software in order to determine numerical dynamic characteristics of the structure such as natural frequencies and mode shapes. Non-destructive experimental measurements were performed to extract the experimental dynamic characteristics. Experimental results were used as a reference parameter for finite element model updating to reflect the current structural behavior of clock tower. Model updating procedure was carried out by changing of initial material properties of structural stone elements, and maximum differences were reduced from 23.44% to 4.90%. Numerical results indicated that displacements have an increasing trend with the height of the clock tower. Furthermore, the maximum displacements occurred at the top point between the values of 18.88 mm to 42.5 mm. Numerical results also showed that both the maximum and minimum principal stresses occurred at the upper body (clock zone) walls and transition segment between the values of 1.08 MPa/2.86 MPa and − 0.87 MPa/−3.00 MPa, respectively. The maximum and minimum principal strains occurred at the upper body (clock zone) walls between the values of 0.65E-3/1.56E-3 and − 0.78E-3/−1.50E-3, respectively. It is also concluded that non-destructive experimental measurement is very useful method to evaluate in-situ structural identification, validate and update the initial finite element model for further analyses.

    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    • SDG 11 · Sürdürülebilir Şehirler ve Topluluklar
    AtıfScopus46WoS43OpenAlex51
    ScopusWeb of Scienceİncele
  • MakaleAçık Erişim2018
    Determination of Earthquake Performance in Masonry Buildings (Bayburt Korkut Ata High School Example)

    Can, Ömer; Yıldızoğlu, Halime

    There are many buildings which are historical and cultural values in Turkey. These structures are of great importance in terms of reflecting the accumulation and techniques of different times and cultures. It is possible to elaborate the performance of reinforced concrete and steel structures constructed with today's technology with advanced numerical methods. But difficulties can be encountered in determining and interpreting the structural performance due to the discontinuities and the changing material properties of the historic agglomerations. In this study; The construction technique, material properties and location features of Korkut Ata High School, which was built between 1944-1947 in Bayburt province center, was compiled. The existing problems observed in the structure have been identified. Using the StatiCAD-Masonry program, it was aimed to perform the performance analysis by taking into account the principles of the 2007 Earthquake Regulation and the 2013 Risky Buildings Regulation. Parallel to the analyzes carried out, the structural performance of the carrier system was evaluated.

    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    • SDG 11 · Sürdürülebilir Şehirler ve Topluluklar
    AtıfOpenAlex7TR Dizin7
    TR Dizinİncele
  • MakaleAçık Erişim2018
    Application of statistical process control method to monitor wear and broken tooth faults in spur gears using vibration data

    Arslan, Hakan; Maraş, Sinan

    Gears are machine elements used extensively in many areas of industry to transmit power and motion. Damage occurs due to working under compulsive conditions effective gear fault detection is crucial to prevent greater drawbacks and economic losses. The objective of this study is to monitor the existence of different types of gear defects by examining changes in the vibrations of spur gears due to faults using vibrations analysis and statistical process control methods. For this purpose, a closed-loop test rig was constructed. Firstly, good gears were attached to the test assembly and vibrations data which received at radial direction via sensors on the bearings were recorded by operating the system at various loading and number of cycle’s conditions. Thus, a reference spectrum was obtained. Then the system was operated with artificial wear and fracture which were created on the surfaces of spur gears at various loading and number of cycles conditions. Vibrations data which were received from the bearings were recorded. These data were plotted on statistical control carts and frequency spectrum. Graphs of data obtained from good gears and defective gears were compared with each other. Thus it was possible to detect the existence of worn gear, one tooth broken pinion gear and one tooth broken from each pinion and wheel gears.

    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    AtıfTR Dizin1
    TR Dizinİncele