Yüksel, Süleyman Bahadır
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Yuksel, Suleyman B.
Yüksel, S. Bahadır
Yuksel, S. Bahadir
Yuksel, Suleyman Bahadir
Yuksel, S.B.
Yuksel, S. B.
Yüksel, S. B.
Yüksel, Süleyman B.
Yüksel, S. Bahadır
Yuksel, S. Bahadir
Yuksel, Suleyman Bahadir
Yuksel, S.B.
Yuksel, S. B.
Yüksel, S. B.
Yüksel, Süleyman B.
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sbyuksel@ktun.edu.tr
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02.02. Department of Civil Engineering
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Current Staff
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16
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17
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10
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Documents
30
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252
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9
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60
Articles
45
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29/313
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2
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1
WoS Citation Count
65
Scopus Citation Count
62
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4
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1.08
Scopus Citations per Publication
1.03
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44
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3
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| Osmaniye Korkut Ata Üniversitesi Fen Bilimleri Enstitüsü Dergisi (Online) | 4 |
| El-Cezeri Journal of Science and Engineering | 4 |
| International Advanced Researches and Engineering Journal | 3 |
| Konya mühendislik bilimleri dergisi (Online) | 3 |
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Now showing 1 - 10 of 60
Article Non-Linear Displacement and Deformation Damage Limits of Reinforced Concrete Circular Columns by Analytical Observations According To Tbsc 2018(2022) Foroughi, Saeid; Yüksel, S. BahadırIn the study, based on the non-linear calculation methods used to determine the seismic performance of structures in TBSC 2018, the stress-strain, moment-curvature, displacement capacity, plastic rotation limits, and deformation-based damage limit values of the reinforced concrete circular cross-section columns were calculated and compared according to different design parameters. The studied effects of the design parameters on the non-linear relation of reinforced concrete columns were also evaluated in terms of strength, curvature, and displacement ductility of the sections. All design parameters affecting the non-linear behavior and deformation limits of the reinforced concrete circular cross-section columns were taken into account. Deformation demands for reinforced concrete structural members are essential for detecting element damage. Based on TBSC (2018), non-linear relationships of reinforced concrete columns were obtained in order to calculate plastic hinge properties and deformation limits. For the Limited Damage, Controlled Damage, and Collapse Prevention performance levels defined for the structural elements in TBSC 2018, plastic rotation and deformation limit values were obtained according to the characteristic values calculated from the non-linear analyzes of reinforced concrete circular columns. For column models, damage limits and damage zones calculated based on TBSC 2018 were shown on the visually obtained moment-curvature relationships. Depending on the upper deformation limit values derived, cross-sectional deformation damage levels were determined and evaluated using the moment-curvature relationships. The variation of the non-linear behavior of column models by design parameters and deformation-based damage limits were examined both analytically and visually. The deformation limits remain in a safer direction as a result of increasing longitudinal and spiral reinforcement ratios for the reinforced concrete circular columns.Article DEPREM ETKİLERİNİN BETONARME ÇERÇEVELER İLE BOŞLUKLU BETONARME PERDELER TARAFINDAN BİRLİKTE KARŞILANDIĞI YÜKSEK BİNALARIN ANALİZ SONUÇLARININ TBDY (2018) VE DBYBHY (2007) ’YE GÖRE KARŞILAŞTIRILMASI(2020) Özer, Ömer; Yüksel, S. BahadırBetonarme birçok yapıda deprem etkileri, betonarme çerçeveler ve betonarme perdeler tarafından birlikte karşılanmaktadır. Bu çalışmanın amacı, bu tip betonarme yapıların analiz sonuçlarının Deprem Bölgelerinde Yapılacak Binalar Hakkında Yönetmelik 2007 (DBYBHY, 2007) ve Türkiye Bina Deprem Yönetmeliği 2018’e (TBDY, 2018) göre karşılaştırıp sonuçlarının incelenmesidir. Rijit bodrum + 13 katlı bina modeli, DBYBHY (2007) için 1. Derece deprem bölgesinde, TBDY (2018)’e göre ise hem İstanbul Atatürk Havaalanı bölgesinin yer ivmesine, hem de Kocaeli Gölcük bölgesinin yer ivmesine göre analiz edilmiştir. Yapının, tüm taşıyıcıları ve tüm parametreleri için karşılaştırma yapıldığında, DBYBHY (2007) ve TBDY (2018) analiz sonuçları arasında ciddi farklılıkların olduğu görülmüştür.Article Asce 41-17’ye Göre Doğrusal Olmayan Hesap Yöntemleri ile Betonarme Taşıyıcı Sistemlerinin Performans Analizin Elde Edilmesi ve Karşılaştırması(2022) Jamal, Rohullah; Yüksel, S. BahadırDoğrusal olmayan statik prosedür (NSP) veya itme analizi basitliği nedeniyle, yapısal ve yapısal olmayan elemanların performanslarının belirlenmesi için kullanılmaktadır. Modelleme sırasında yapıdaki her bir elemanın doğrusal olmayan özelliklerinin ve deformasyon kapasitelerinin belirlenmesi gerekmektedir. İtme analizi, ASCE 41-17 yönetmeliğine göre tanımlanan plastik mafsal özellikleri ele alınarak gerçekleştirilir. Programlara tanımlanan plastik mafsal özelliklerinin sınır değerleri verilirken programlar sınır değerlerinin içeresindeki değerleri otomatik olarak hesaplamaktadır. Varsayılan mafsal özelliklerinin yanlış kullanılması, mevcut yapılar için hatalı yer değiştirme kapasitelerine yol açabilmektedir. Bu çalışmada, ASCE 41-17’de tanımlanan doğrusal olmayan elemanların plastik mafsal özellikleri ele alınarak itme analizi yapılmıştır. Betonarme taşıyıcı sistemlerin analiz sonuçları incelenerek birbiri ile karşılaştırılmıştır. Plastik mafsal özelliklerinde en etkili parametreler plastik mafsal uzunluğu ve enine donatı aralığıdır. Bu çalışmada doğrusal olmayan hesap yöntemlerinden biri olan artımsal eşdeğer deprem yükü ile itme analizi yöntemiyle 3 açıklıklı 1, 2 ve 3 katlı betonarme yapıların analizleri yapılmıştır. Yapı sistemleri üzerinde gerçekleştirilen analizler sonucunda kapasite eğrileri elde edilmiştir. ASCE 41-17’ye göre hesaplanan tepe yer değiştirme miktarı ve taban kesme kuvveti, kat sayısı arttığı zaman artmaktadır. ASCE 41-17 yönetmeliğine göre yapılan analizlerden elde edilen sonuçlar kat yüksekliğine, yapıya etkiyen düşey yük miktarına ve efektif rijitliğine bağlıdır.Article A New Approach to Determine the Flexural Stiffness Coefficient for Reinforced Concrete Shear Walls According to Non-Linear Behaviour(Penerbit UTHM, 2025) Foroughi, S.; Yüksel, S.The precision in calculating the stiffness of reinforced concrete sections is critical for establishing accurate values for structural stiffness and the associated seismic loads. This study investigated effective stiffnesses recommended for use in designing and analysing structures. A total of 135 section models with transverse and longitudinal reinforcement ratios, compressive strength of concrete and axial load levels affecting the analytical analysis of the nonlinear behavior of reinforced concrete shear walls with high ductility levels were considered. The key parameters influencing effective stiffness an aspect that encompasses the impact of cracking and theoretical yielding within structural sections were identified through thorough moment-curvature analyses conducted on a range of shear wall sections. According to the numerical analysis results of the shear wall models, it was found that these design parameters were effective on the stiffness coefficient of the sections. Considering the effective stiffness of section models, a secure and simpler equation is proposed to include these parameters. The equation provides a high degree of accuracy in design and analysis by considering the nonlinear behavior of shear walls in buildings concerning important design parameters. Based on the results of the nonlinear analysis, the proposed predictions for the effective stiffness coefficient, relations proposed by many researchers, standards, and codes, are verified by comparisons with moment-curvature relations. The proposed equation for the effective stiffness of shear wall sections with high ductility levels offers fairly accurate and consistent estimates since it considers all design parameters that affect the non-linear behavior of the sections. This equation has been compared with nonlinear analyses of section models and existing relationships in the literature and has been proven to be reasonably accurate for practical engineering design applications. In the proposed equation, the stiffness coefficients of shear walls can be calculated according to these effective design parameters, and it can verify and design high ductility shear walls with sufficient accuracy in practical engineering design and analysis applications. © This is an open access article under the CC BY-NC-SA 4.0 license.Article Nonlinear Behaviour of the Concrete Core of the Diagonally Reinforced Coupling Beams(Gazi Univ, 2024) Yüksel, Süleyman Bahadır; Foroughi, SaeidCoupled shear walls with coupling beams are constructed because of openings such as doors, windows, or other installations that are left behind due to functional reasons in shear walls. In coupling beams having a ratio of span-to-depth less than two, shear fracture occurs rather than flexural fracture. In order to meet the shear force and the bending moment formed by the coupling beams, diagonal bundles are used in the coupling beams. Diagonal reinforced coupling beams are generally preferred because diagonal reinforced coupling beams exhibit better behaviour than conventional reinforced coupling beams. The diagonal reinforcement bundles have to be confined by transverse reinforcements prescribed in the codes. Confined concrete in the diagonal reinforcement bundles has stress-strain characteristics that are distinctly different from those of plain concrete. The effects of longitudinal and transverse reinforcement ratios on the stress-strain behaviour of confined concrete inside the diagonal reinforcement bundles were investigated. Fifty-four reinforced concrete coupling beams with different confining parameters of the diagonal reinforcement bundles and different variables were analysed using the program. It was demonstrated that the strength and the maximum strain of the concrete inside the diagonal reinforcement bundles increase with the reinforcement ratio of the confinement reinforcement. The increase in the diameter of the transverse reinforcement and the decrease in the spacing of the transverse reinforcement diagonal bundles, increase the confining effect, strength, and ductility in the concrete sections. The increase in the ratio of transverse and diagonal reinforcement significantly affects the seismic behaviour of the coupling beams.Article Citation - WoS: 3Citation - Scopus: 2Experimentally Validated Numerical Investigation on the Behavior of Composite Shear Walls Subjected To Cyclic Loading(Elsevier - Division Reed Elsevier India Pvt Ltd, 2024) Kisa, M. Hasim; Yuksel, S. Bahadir; Ozmen, RamazanDue to design considerations, reinforced concrete (RC) shear walls, with narrow cross-sections containing excessive steel reinforcing bars, are commonly used in tall buildings for seismic resistance to produce functional floor plans. However, as is particularly evident in the end region components of the RC shear walls, bulky reinforcement can lead to difficulties in concrete pouring and cause concrete segregation. Accordingly, this study concentrates on the numerical investigation of composite shear wall behavior created using cold-formed steel sheet (CFSS) elements under cyclic loading. Three composite shear wall test specimens, having L-shaped CFSSs utilized in the shear wall end regions, were modeled on a 1/3 scale with ABAQUS finite element analysis software. The specimens' crack propagation behavior was investigated at each loading stage in the numerical analyses and validated with experiments. Furthermore, the lateral force-top displacement relationship was used to assess the wall's behaviors. According to the results, the modeling approach accurately simulates the composite shear wall's behavior. Finally, a parametric analysis was performed with the verified numerical simulations to examine the effect of the CFSS elements' material properties on the composite shear walls. The parametric studies revealed that the steel sheets' yield strength and position from the neutral axis affected the shear walls' lateral load-bearing capacity.Article The Effect of Coupled Beam Models in Buildings Where Earthquake Loads Are Fully Resisted by R/C Shear Walls on Structural Performance(TUBITAK, 2021) Özer, Ömer; Yüksel, S. BahadırReinforced concrete shear walls around the stairs and elevator shafts, which are at the core of the structures where earthquake loads are fully resisted R/C shear walls, are generally connected to each other with coupling beams. The aim of this study is to examine the effects of different reinforced concrete coupling beam types and analysis models whose earthquake loads are fully resisted by R/C shear walls on the performance of the building. In this study, nonlinear pushover analysis was performed for each R/C coupling beam model according to the ground acceleration of the Istanbul Ataturk Airport region according to the Turkish Building Earthquake Code (2018) of the 16-storey building model, which uses fully shear walls as vertical carrier. When the analysis results are examined, it has been seen that different reinforced concrete coupling beam types have serious effects on structural performance targets. © 2021, TUBITAK. All rights reserved.Article Citation - Scopus: 3Investigation of the Moment–curvature Relationship for Reinforced Concrete Square Columns(2020) Foroughi, Saeid; Yüksel, S. BahadırIn this study; the effect of the material model, axial load, longitudinal reinforcement ratio, transverse reinforcement ratio and transverse reinforcement spacing on the behavior of reinforced concrete cross-sections were investigated. Squared cross-section column models have been designed. The effect of axial load, transverse reinforcement diameter and transverse reinforcement spacing on the behavior of reinforced concrete column models have been analytically investigated. The behavior of the columns was evaluated from the moment-curvature relation by taking the nonlinear behavior of the materials into account. The moment-curvature relationships for different axial load level, transverse reinforcement diameter and transverse reinforcement spacing of the reinforced concrete column cross-sections were obtained considering Mander confined model. Moment-curvature relationships were obtained by SAP2000 Software which takes the nonlinear behavior of materials into consideration. The examined effects of the parameters on the column behavior were evaluated in terms of ductility and the strength of the cross-section. In the designed cross-sections, the effect of transverse reinforcement diameter and transverse reinforcement variation on the confined concrete strength and the moment-curvature relationship was calculated and compared for constant longitudinal reinforcement ratio. The examined behavioral effects of the parameters were evaluated by comparing the curvature ductility and the cross-section strength. It has been found that transverse reinforcement diameters and transverse reinforcement spacing are effective parameters on the ductility capacities of the column sections. Axial load is a very important parameter affecting the ductility of the section. It has been observed that the cross-sectional ductility of the column sections increases with the decrease in axial load.Article Yüksek Çekme Donatısı Oranına Sahip T En-kesitli Betonarme Kirişlerin Moment-eğrilik İlişkisi(2020) Jamal, Rohullah; Yüksel, S. BahadırBu çalışmada yüksek çekme donatısı oranına sahip T en-kesitli betonarme kirişlerin moment eğrilik ilişkisi araştırılmıştır. T en-kesitli betonarme kirişlerin çekme donatısı oranı yüksek olacak şekilde sabit alınmış, beton sınıfı ve basınç donatısı oranları değiştirilerek parametrik çalışma yapılmıştır. Altı tip toplam 66 adet farklı parametrelere sahip T en-kesitli betonarme kiriş tasarlanmıştır. Kiriş malzemelerinin doğrusal olmayan davranışları göz önüne alınarak T en-kesitli betonarme kirişlerin moment-eğrilik ilişkilileri elde edilmiştir. Akma ve kırılma durumunda moment-eğrilik değerleri, eğrilik süneklik değerleri, süneklik oranları ve efektif rijitlik değerleri hesaplanmıştır. Analiz sonuçlarından farklı parametrelerden elde edilen sonuçlar çizelgeler halinde sunulmuş ve sonuçlar değerlendirilmiştir. T en-kesitli betonarme kirişlerin davranışı, eğrilik sünekliği, efektif süneklik oranı, efektif rijitliği, kirişlerin akma ve maksimum moment taşıma kapasitelerinin değerlerinden yararlanarak yorumlanmıştır. T en-kesitli betonarme kirişlerin basınç donatısı oranının artması ile akma momenti ve maksimum moment taşıma kapasitesi değerleri artmakta fakat akma eğrilik değerleri azalmaktadır. Basınç donatısı olmayan (?'=0) kirişlerde maksimum eğrilik değerleri basınç donatısı bulunan T en-kesitli kirişlerden daha düşük elde edilmiştir. Basınç donatısı ?'=0.1? ile ?'=? arasında olan T en-kesitli kirişlerde maksimum eğrilik değerleri yaklaşık olarak sabit kalmaktadır. T kesitli betonarme kirişlerde basınç donatısının elemanların eğrilik sünekliğine, efektif rijitliklerine, maksimum eğriliklerine, akma momentine ve maksimum moment taşıma kapasitesine olumlu etkisi olduğu gözlemlenmiştir.Conference Object Boşluklu Perdelerde Bağ Kirişlerin Test Edilen Sonuçlarının Kapasite Tasarımı Sonuçları ile Karşılaştırması(2019) Yüksel, Süleyman Bahadır; Jamal, Rohullah
