Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Tuğan, Volkan(4)
- Etli, Serkan(3)
- Kahraman, Gökhan(3)
- Işık, Erdem(2)
- Mahmat, Aybars(2)
- Polat, Erkan(2)
- Yardımcı, Uğurcan(2)
- Yucesan, Melih(2)
- Akan, Yaprak(1)
- Akgül, Melek(1)
- Aydogdu, Burcu(1)
- Aşkın, Muzaffer(1)
- Bakır, Eda(1)
- Bayrak, Fatih(1)
- Can, Umit(1)
- Celik, Ertugrul(1)
- Erdem, Necla Seval(1)
- Eski, Özkan(1)
- Furtana, Beyza(1)
- Gul, Muhammet(1)
- Kaymaz, Kürşat(1)
- Kismet, Yilmaz(1)
- Kouider, Bendine(1)
- Omaç, Zeki(1)
- Orhon, Ahmet Vefa(1)
- Oztop, Hakan(1)
- Polat, Alper(1)
- Polat, Berivan Yılmazer(1)
- Sabanci, Serdal(1)
- Sahin, Engin Sahin(1)
- Taşgın, Yahya(1)
- Taşkaya, Semih(1)
- Unal, Ilkay(1)
- Utku, Anıl(1)
- Uzun, Arif(1)
- Zengin, Bilgin(1)
- Çelık, Ertugrul(1)
- Özdemir, Osman(1)
- Şenel, Bilgin(1)
- Şenel, Mine(1)
Yayınlar
- MakaleYalnız künye2026Investigation of flow design and deflector plate effect in air cooled battery pack at different discharge rates
Tuğan, Volkan; Yardımcı, Uğurcan
In this study, the effect of different flow designs and the use of deflector plates on the thermal performance of an air cooled battery pack was investigated using the CFD method. Model A, which has a conventional single inlet flow structures, was compared with Model B, which employs dual inlets and deflector plates. In both models, 24 cylindrical 18650 lithium-ion battery cells were used, and the inlet and outlet surface areas of the battery pack were designed to be equal. Analyses performed at 3C and 4C discharge rates showed that the dual inlet flow structure and deflector plates significantly improved the cooling efficiency of the battery pack. At a 3C discharge rate, the maximum battery temperature and maximum temperature difference obtained with Model B were 1.87 K and 1.08 K lower, respectively, compared to Model A. At a 4C discharge rate, this improvement became even more pronounced, with the maximum battery temperature reduced by 2.49 K and the maximum temperature difference decreased by 1.44 K. Examination of the temperature contours revealed that, in Model A, heat accumulation occurred particularly in the rear regions, whereas Model B achieved a more homogeneous temperature distribution.
- MakaleAçık Erişim2026Innovative System Design and Numerical Investigation Based on Air Cooling and Baffle Utilization in the Thermal Management of Lithium Ion Batteries
Tuğan, Volkan; Yardımcı, Uğurcan
Effective management of temperature in battery packs, which are used in a wide range of applications from portable devices to electric vehicles, plays a critical role in terms of both efficiency and safety. In this study, a new air cooling thermal management system was designed to improve the thermal management of lithium ion battery packs and was comparatively examined with a conventional system. In the developed design, front and rear air inlets along with a top outlet were implemented, and baffles were added to achieve a more homogeneous distribution of airflow between the cells. The conventional system, on the other hand, was modeled based on the principle of front inlet and rear outlet without baffles. These two designs were compared through CFD analyses in terms of maximum battery temperature and maximum temperature difference. In the analyses, three different inlet air temperatures of 299.15 K, 294.15 K, and 289.15 K were investigated. The airflow velocity at the entrance of the battery pack was set to 0.5 m/s. The analysis results showed that the developed design reduced the maximum battery temperature and maximum temperature difference by 1.82-3.38 K and 2.48-4.29 K, respectively, compared to the conventional design.
- MakaleAçık Erişim2025Hidroelektrik Santrallerde Türbin-Jeneratör Yatak Arızaları Sonucu Oluşan Mekanik Titreşimler ve Çözüm Yöntemleri
Kahraman, Gökhan
Günümüzde imal edilmekte olan hidrolik türbinlerin güçlerinin ve boyutlarının çok artmış olması ciddi bir mekanik titreşim ve şaft salınımı problemini de beraberinde getirmektedir. Bilinmektedir ki mekanik titreşime (vibrasyon olayı) maruz kalan bir makine devamlı olarak çekme, basma, eğme, burma, kesme gibi değişken mekanik baskılarla sürekli olarak zorlanmaktadır. Hidrolik türbinlerin bu tür titreşim ve salınımlara maruz kalmaları işletme güvenliğini ve işletmede kalma süresini önemli derecede azaltmaktadır. Bu çalışmada, bir hidroelektrik santrale ait Francis tipi tür-binde yatak boşluğunun müsaade edilen sınırları aşması neticesinde meydana gelen, mekanik titreşimler (vibrasyon olayı) ve şaft salınımları arızası incelenmiştir. Tür-bin – Jeneratör yataklarına tekrar ayar yapıldıktan sonra oluşan şaft salınımları, arıza durumunda oluşan şaft salınımları ile kıyaslanmıştır. Sonuç olarak arıza sonrası hidrolik türbin yataklarının ölçüleri kabul edilen standartlara getirildikten sonra mekanik titreşimler ve şaft salınımları normal seviyelere gelmiştir. Mekanik ti-tre-şimden kaynaklı arızalar ve aşırı şaft salınımı sonucu oluşacak yatak sürtmesi gibi büyük arızalar engellenmiştir.
- MakaleAçık Erişim2025Regional Variations in the Physical and Rheological Properties of Asphalt Binders Recovered from Earthquake-Damaged Roads Following the February 6, 2023 Türkiye Earthquakes
Furtana, Beyza
This study investigates the physical and rheological properties of asphalt binders recovered from earthquake damaged road sections in Hatay, Kahramanmaras, Gaziantep, and Malatya following the February 6, 2023, earthquakes in southern Türkiye (Mw = 7.8 and Mw = 7.5). Asphalt mixture samples were collected from severely deteriorated pavements, and bitumen was extracted through solvent extraction and rotary evaporation. The recovered binders were subjected to penetration, softening point, rotational viscosity, and Dynamic Shear Rheometer (DSR) tests to evaluate aging, stiffness, high-temperature performance, and viscoelastic behavior. Results revealed significant regional differences: Hatay binders exhibited the lowest penetration, highest softening point, highest viscosity, and the greatest rutting resistance (high G*/sinδ values) while maintaining lower phase angles, indicating enhanced stiffness and elasticity. In contrast, Kahramanmaras binders showed the highest penetration, lowest softening point, and lower viscosity, combined with high phase angles, reflecting a softer, more viscous character with reduced deformation resistance. Malatya and Gaziantep binders displayed intermediate characteristics, with Malatya showing moderate stiffness and Gaziantep retaining greater flexibility. Across all samples, viscosity decreased markedly with increasing temperature, and rutting resistance diminished at higher service temperatures; however, binders with higher initial G*/sinδ values retained better performance. The findings highlight the influence of regional seismic intensity, climatic conditions, and pavement history on binder behavior and emphasize the need for region-specific maintenance and rehabilitation strategies in post-disaster pavement management.
- MakaleYalnız künye2025The Investigation of the Weldability of Ti6Al4V Alloy with Different Stainless Steel Series Using Copper Interlayer via Friction Welding
Çelık, Ertugrul
Friction welding is a solid-state welding method used for joining metals with different properties, providing minimal thermal deformation in welded joints. Based on this advantageous feature of friction welding, this study investigates the weldability of Ti6Al4V alloy with 316L, 316Ti, 310, 430, and 304 series stainless steels using a Cu powder interlayer. Following the experimental procedures, the microstructures of the materials were analyzed using SEM-EDX, their macrostructures were visually inspected for physical changes, microhardness measurements were taken, and tensile tests were performed. It was observed that the Cu powder interlayer significantly influenced the reactions and bonding between the materials, playing a crucial role in both microstructure and mechanical properties. In this study, successful joining results were achieved using the friction welding method, and the microstructural characteristics and mechanical performance of the welded joints were thoroughly evaluated. Upon examining the microhardness results, no significant variations in hardness values were observed on the Ti6Al4V side.
- MakaleAçık Erişim2024Biogenic Synthesis, Characterization and Degradation of Methylene Blue Dye of Zinc Oxide Nanoparticles from Different Zinc Salts Using Cinnamomum verum Extract
Aydogdu, Burcu; Unal, Ilkay
In this study, zinc oxide nanoparticles (ZnONPs) were synthesized using Cinnamomum verum extract from different zinc salts such as zinc acetate, zinc nitrate, zinc sulfate, and zinc chloride. The synthesized ZnONPs were characterized using X-ray diffraction (XRD), dynamic light scattering (DLS), Fourier transform infrared spectroscopy (FT-IR), and transmission electron microscopy (TEM). Additionally, The photocatalytic activities of ZnO nanoparticles were tested in the presence and absence of sunlight. Cinnamomum verum extract was analyzed for DPPH radical scavenging activity and total phenolic content (TPC). The study results showed that the type of zinc salt used significantly affects the morphology, size, and crystal structure of the ZnO nanoparticles. ZnONPs synthesized from zinc acetate (ZnONPsA) showed superior photocatalytic activity in the presence and absence of sunlight.
AtıfOpenAlex1
İncele - MakaleAçık Erişim2024Sentetik Atık Takviyeli Poliolefinlerin Mekanik Özelliklerinin GA-LSTM Hibrit Modeli ile Tahmini
Utku, Anıl; Kismet, Yilmaz; Can, Umit
Bu çalışmada, parçacık takviyeli termoplastiklerin enjeksiyon kalıplamasında kullanılan üretim parametrelerinin ürün kalitesi ve üretilen parçanın mekanik özellikleri üzerindeki etkileri optimize edilmiş bir Genetik Algoritma-Uzun Kısa Süreli Bellek (GA-LSTM) hibrit derin öğrenme yöntemi kullanılarak modellenmiştir. Burada termoplastik olarak poliolefinler grubunun en önemli üyesi olan AYPE, YYPE ve PP kullanılırken takviye elemanı olarak ise toz halde sentetik boya atıkları kullanılmıştır. Farklı parametreler kullanılarak enjeksiyon kalıplama yoluyla 819 numune üretilmiş ve her numune üzerinde mekanik çekme, üç nokta eğme ve izod darbe testleri gerçekleştirilmiştir. GA-LSTM modeli, kullanılan parametreler ve deneysel süreç boyunca elde edilen sonuçlarla eğitilmiş ve tahmin edilen değerlerin gerçek değerlere karşılık geldiği belirlenmiştir. Hibrit GA-LSTM modelinin başarısını ölçmek için iyi bilinen yöntemler kullanılmıştır. Elde edilen sonuçlara göre tasarlanan GA-LSTM modeli en iyi sonuçları üretmiştir.
- MakaleAçık Erişim2024Investigation of tool wear and thrust force in drilling aisi 316 austenitic stainless steel using electrophoresis method
Mahmat, Aybars
Cutting tool costs are an important component of machining. For this reason, improving machining methods in machining affects the life of the cutting tool. Recently, various machining methods have been used to extend tool life by reducing cutting tool wear. One of these methods is electrophoresis-assisted processing. Electrophoresis-assisted machining is a non-traditional machining method created by the impact of abrasive nanoparticles on the machining area with the help of the generated electric field. Electrophoresis-assisted machining increases the machinability of difficult-to-machine materials with high strength and hardness properties compared to traditional machining methods. In this study, the impacts of various cutting parameters on the drilling performance of AISI 316 L stainless steel material were searched using electrophoresis-assisted drilling (EAD) and conventional drilling (CD) methods. In the study, SiC powder was used as nanoparticles in the solution obtained to create the electric field. Within the scope of the experiments, the effects of different machining methods, cutting speeds and feed rates on thrust forces and cutting tool wear values were experimentally examined. As a result of the investigations, the cutting tool wear and thrust cutting force obtained with EAD are better than CM. Increasing feed rate and cutting speed increased cutting tool wear in both machining methods. It has been determined that the thrust force decreases as the cutting speed increases, while it increases as the feed rate increases.Keywords: Electrophoresis, drilling, cutting force, tool wear, AISI 316
- MakaleAçık Erişim2024Hardox 500 Çeliğinin Delinmesinde Minimum Miktarda Yağlama Yönteminin Yüzey Pürüzlülüğü ve Kesme Sıcaklığına Olan Etkisinin İncelenmesi
Mahmat, Aybars
Hardox 500 aşınma ve kırılmalara karşı dirençli, yüksek sertlik ve mekanik muka-vemete sahip sertleştirilmiş bir çeliktir. Bu yüksek mekanik özellikler bu malzemenin işlenebilirliğini sınırlamaktadır. Bu çalışmanın amacı işlenmesi zor olan Hardox 500 çeliğine farklı soğutma yöntemleri ve işleme parametrelerinin uygulanmasıyla işle-nebilirliğini artırmaktır. Endüstriyel açıdan önemli bir malzeme olan Hardox 500 çeliğinin çeşitli kesme ortamları kullanılarak işlenebilirliğini artırmak amaçlanmış-tır. Farklı ilerleme hızları, kesme hızları ve soğutma yöntemlerinin yüzey pürüzlü-lüğüne, kesme sıcaklıklarına, takım aşınmasına olan etkisi incelenmiştir. Deneysel sonuçlara göre Minimum miktarda yağlama (MMY) yöntemi yüzey kalitesini artır-dığı ve yan yüzey aşınması ile kesme sıcaklıklarını düşürdüğü görülmüştür. Kuru koşullara göre MMY yöntemi kullanılarak yüzey pürüzlülüğünde yaklaşık %20-30, kesme sıcaklığında yaklaşık %15-35 yan yüzey aşınmasında %22-30 oranında iyi-leşme elde edilmiştir. Yüzey kalitesini optimize etmek için yüksek kesme hızı ve düşük ilerleme hızlarının seçilmesi gerektiği görülmüştür. Yüksek kesme hızı ve ilerleme hızı sürtünmeyi artırarak sıcaklığı artırmıştır.
- MakaleAçık Erişim2023Comparative Analysis of Composite Buildings Produced in National and International Standards
Etli, Serkan; Akgül, Melek
Composite moment resisting frame buildings with 5-, 10-, 15- and 20-story concrete filled steel tube columns and composite beams were modelled. The buildings are designed according to Turkish Code for Design and Construction of Steel Structures-2016 (TCDCSS-2016) and Türkiye Building Earthquake Code-2018 (TBEC-2018) regulations at high ductility levels. The design of the DCH structures was designed in ZC ground for a 0.79 g PGA. While choosing the design location, it is assumed that the construction will be made in a region between the North Anatolian fault line and the East Anatolian fault line, that is, in a region with high earthquake risk. Within the scope of the study, SeismoStruct [1] software was used during the design and performance evaluation of the structures. Nonlinear static push and incremental dynamic analyses were used. Uniform and triangular load distributions were adopted in the PO analysis, and 16 earthquake ground motions were used in the dynamic analysis. The effect of story number on the seismic behavior of CMRFs was investigated using nonlinear analysis results. Accordingly, variation in lateral response, overstrength factors, ductility, and section capacity change of members for CMRF structures were presented. In addition, a mutual evaluation was made with the performance parameters obtained from previous studies with similar geometries.
AtıfOpenAlex3TR Dizin2İncele - MakaleAçık Erişim2023Numerical Analysis of Double Geopolymer Concrete Layer with Different Properties
Polat, Berivan Yılmazer
Researchers have been working to find alternatives to conventionally produced concrete in recent years. Geopolymer concretes are also the focus of these studies. There are not enough studies on modelling geopolymer concretes, which are the subject of many experimental studies. In this study, which is believed to close the gap in the literature, stress and strain analyses of geopolymer concrete with two different properties under load in two different systems were performed. The locations of the concrete with different properties were also changed in the model, and the results obtained in both cases were compared. It was observed that when the geopolymer concrete with a lower modulus of elasticity and 100% slag content was on top, the stress values decreased, and the strain rates increased.
- MakaleAçık Erişim2022Boundary plate influence on tie bars axial force demands in composite plate shear walls‒concrete filled
Polat, Erkan
In composite plate shear walls–concrete filled (C-PSW/CF), there is an indeterminate flow of force between concrete, steel plate and tie bars. Finite element methods (FEM) are frequently used to verify this force flow. The theoretical models available in the literature to predict the tie bar maximum axial force demands were based on walls without boundary plates. The finding in this study is intended to help understand whether current theoretical approaches are conservative and can be applied to boundary plate walls as well. Within the scope of this study, tie bar axial force de-mands for walls with boundary plates consisting of planar and round shapes and without boundary plates were investigated and compared. For this, a previously benchmarked finite element (FE) wall model was considered and configured to have no boundary plate and have planar and round boundary plates. FE models were ana-lyzed under monotonic lateral displacement up to 4% drift ratio. Passive lateral pres-sures and transverse force variations on the planar and round boundary plates were investigated.
AtıfOpenAlex2TR Dizin1İncele - MakaleAçık Erişim2022Investigation of an Outer Rotor In-Wheel Switched Reluctance Motor for Electric Vehicles by Finite Element Method
Omaç, Zeki
The demand of fossil fuel vehicles has decreased due to carbon emissions. Recently, electric vehicles (EV) with electric motor propulsion have gotten attention due to their zero carbon emissions and high efficiency. In this study, an outer rotor in wheel switched reluctance motor (IWSRM) with 18 poles on the stator and 24 poles on the rotor, designed for the propulsion of electric vehicles, is investigated in two-dimensional Finite Element Method (FEM). The magnetic field distributions of IWSRM for different rotor positions at nominal current are obtained. Then, the torque and phase inductance are calculated. As a result, the designed IWRSM provided low torque.
AtıfOpenAlex1TR Dizin1İncele - MakaleAçık Erişim2022Parametric Analysis of the Performance of Steel-Concrete Composite Structures Designed with TBDY 2018
Etli, Serkan
In this study, the seismic behavior of steel-concrete composite buildings designed using ÇYTHYE 2016 and TBDY 2018 was investigated. For this purpose, composite moment resisting frame buildings with concrete filled steel tube columns and composite beams with 5, 10, 15 and 20 stories are modeled. Buildings are designed at high ductility (DCH) levels. During the design of the DCH class structures, the design was carried out for the ZA soil class for 0.79 g PGA in the region selected from the earthquake map given in the regulations. Within the scope of the study, SeismoStruct software was used during the design and performance evaluation of the structures. Incremental dynamic analyzes were used along with nonlinear static pushover analyses. In the static pushover analysis, uniform and triangular load distributions of the lateral load are adopted. In the dynamic analysis, 16 earthquake ground motions were obtained from AFAD earthquake acceleration databases according to the relevant design area and used. The variation of the seismic behavior of CMRFs depending on the variation of the floor number was investigated using nonlinear analysis results. Accordingly, the variation in lateral response, overstrength factors and ductility factors for CMRF structures are presented comparatively. In addition, the section deformation capacities were investigated during the IDR changes during dynamic and static nonlinear analyses. The behavior factor of all CMRFs, especially the CMRFs studied in the case study, demonstrated above-expected performance according to the design assumptions.
AtıfOpenAlex18TR Dizin2İncele - MakaleAçık Erişim2022Failure-based maintenance planning using bayesian networks: a case study hydraulic turbine
Yucesan, Melih; Kahraman, Gökhan
The assessment of existing infrastructures in the energy sector is of great economic importance for the world. The extension of the power generation life of hydroelectric power plants depends on logical decisions regarding the maintenance and renewal of the equipment. For this purpose, a Bayesian network (BN) has been applied to evaluate the failures in the hydraulic turbine to calculate the failure of the turbine. Forty-six nodes have been identified that will affect the operation of the system. Preventive measures have been established for failures with the highest posterior probability. By creating four different cases, failure probabilities and the change of the main fault have been calculated. How much savings could be made in each case is determined with the maintenance. This proposed framework will be guided in determining the maintenance strategies for hydroelectric power plant operators.
AtıfOpenAlex1İncele - MakaleAçık Erişim2021Çiçek Tip Şaşırtma Levhasına Sahip Gövde Borulu Isı Değiştiricinin CFD Analizi
Işık, Erdem; Tuğan, Volkan
Gövde borulu ısı değiştiricilerinin ısıl ve hidrolik performansını etkileyen en önemli faktörlerden bir tanesi şaşırtma levhasıdır. Bu çalışmada, ANSYS Fluent programı aracılığıyla, çiçek tip şaşırtma levhasına sahip gövde borulu ısı değiştiricinin CFD analizi yapılmıştır. Analizlerde, çiçek tip şaşırtma levhasının gövde tarafı ısı taşınım katsayısına, basınç düşüşüne ve basınç düşüşü başına düşen ısı transfer oranına etkisini araştırmak amaçlanmıştır. Ek olarak, çiçek tip şaşırtma levhası ile geleneksel tek parçalı şaşırtma levhası karşılaştırılmıştır. Tasarlanan gövde borulu ısı değiştiricinin gövde tarafında çalışma akışkanı olarak su kullanılmıştır. Analizlerde, gövde tarafındaki akışkan için dört farklı kütlesel debi (1.2 kg s-1, 1.5 kg s-1, 1.8 kg s-1 ve 2.1 kg s-1) incelenmiştir. Çalışmadan elde edilen sonuçlara göre, çiçek tip şaşırtma levhasının geleneksel tek parçalı şaşırtma levhasına göre basınç düşüşü başına düşen ısı transfer oranını artırdığı gözlemlenmiştir.
AtıfOpenAlex2TR Dizin1İncele - MakaleAçık Erişim2021Experimental Analysis of PV/T Collectors Assisted with PCM for Off-Grid Domestic Applications
Bayrak, Fatih; Oztop, Hakan; Bakır, Eda
An experimental study was carried out to examine the efficiency of solar energy in photovoltaic thermal collectors (PV/T) with energy storage. A photovoltaic thermal collector was used to generate both electrical energy and hot water. The effects of inclination angle of PV/T collectors on power, temperature, energy and exergy values were investigated. Also, effects of cellular shading are tested and discussed. PV/T was compared with the conventional PV/T collector by adding phase change material (PCM) for one of the collectors. In addition, the effect of different shading conditions (small, medium and large circle) on the power and hot water output of the PV/T collector at optimum slope angle were investigated. It is found that 7 ºC temperature differences are occurred in the hot water outlet between the PV/T collector and the PV/T-PCM collector. The highest energy efficiencies of PV/T-PCM collectors are obtained as 73.26%, 84.70% and 68.96% for slope angle 25º, 30º and 35º, respectively. The highest exergy efficiencies of shaded collectors are obtained as 11.92% for PV/T and 23.38% for PV/T-PCM.
AtıfOpenAlex4TR Dizin1İncele - MakaleAçık Erişim2021Dairesel Bir Boruda Kullanılan Boyuna Dalgalı Kanatçıkların Isı Transferine Etkisinin Sayısal Olarak İncelenmesi
Işık, Erdem; Tuğan, Volkan
Boruların dış yüzeyine yerleştirilen kanatçıklar ısı transferini önemli ölçüde etkilemektedir. Bu çalışmada, boyunadalgalı kanatçıkların ısı transferine etkisini araştırmak amacıyla içerisinden ısı transfer akışkanı olarak suyun aktığıdairesel bir borunun üç boyutlu akış analizi gerçekleştirilmiştir. Dairesel boruda 1 mm kalınlığa sahip 18 adet boyuna düzve boyuna dalgalı bakır kanatçıklar kullanılmıştır. Kanatçık tipine göre kütlesel debiyle ısı transferinin değişiminiincelemek için 0,1 kg s⁻¹, 0,14 kg s⁻¹, 0,18 kg s⁻¹ ve 0,22 kg s⁻¹ olmak üzere dört farklı kütlesel debi kullanılmıştır. Eldeedilen sonuçlara göre, boyuna dalgalı kanatçıkların boyuna düz kanatçıklara kıyasla ısı transferini en düşük %8, en yüksek%11 oranında arttırdığı gözlemlenmiştir.
AtıfOpenAlex5TR Dizin2İncele - MakaleAçık Erişim2021TOPSIS-Sort temelli nicel bir mesleki risk değerlendirme metodolojisi ve alüminyum ekstrüzyon endüstrisinde uygulanması
Gul, Muhammet
Alüminyum ekstrüzyon üretimini de kapsayan metal ürünleri sektörü, iş sağlığı ve güvenliği (İSG) açısından yüksek risk taşıyan sektörlerden biridir. Bu durum ve sektördeki iş kazalarının artış eğilimi göz önüne alındığında, iş güvenliğinin artırılması ihtiyacı ortaya çıkmaktadır. Bu nedenle, bu çalışma, alüminyum ekstrüzyon endüstrisindeki riskleri yönetmek için kümeleme temelli bir TOPSIS yaklaşımı (TOPSIS-Sort) ile nicel bir mesleki risk değerlendirmesi önermektedir. Risk değerlendirmesinde önemli bir süreç olan elde edilen risk değerine göre risk sınıflandırmasının gerekliliği nedeniyle sıralamaya dayalı bir metodoloji önerilmiştir. Metodolojinin uygulanabilirliği, 28 potansiyel tehlikenin üç risk parametresi (olasılık, ciddiyet ve sıklık) altında değerlendirilmesiyle gösterilmiştir. Değerlendirilen tehlikeler beş risk kümesine (Çok yüksek risk, Yüksek risk, Önemli risk, Olası risk ve Risk) bölünmüş ve risklerin azaltılmasını sağlayacak kontrol önlemleri belirlenmiştir. Çalışmanın sonuçları, Çok yüksek risk kümesine bir tehlikenin, Yüksek risk kümesine 3, Önemli risk kümesine 23 ve Olası risk kümesine bir tehlike atandığını göstermektedir.
AtıfOpenAlex16TR Dizin4İncele - MakaleAçık Erişim2021Analytical Evaluation of Behavior of Composite Columns Under Axial Load
Etli, Serkan
In the literature, various studies have been carried out for different nonlinear modeling strategies to model the response of such composite column members subjected to dynamic loads. In studies of concrete filled steel tubes elements with software using a finite element method such as ABAQUS, ANSYS and LS-DYNA, which have been used in the literature in recent years, it is seen that steel and concrete components are generally modeled separately with the help of plate, shell, or solid elements. To simulate the interaction between these element models, the help of some other connector or interface elements is needed. Therefore, the biggest disadvantage of using commercial packages is that very complex calculations arise by using much smaller parts of the element to be analytically modeled and the interaction structures to be produced between them. As a result, the necessity of computationally intensive and at the same time long-term work emerges. Within the scope of this study, it is aimed to calculate composite columns faster and more accurately as possible by using fiber section elements and standard material models under axial loading effects. It was observed that the selected parameters had a significant effect on the results obtained
AtıfOpenAlex6TR Dizin5İncele