Sürdürülebilir Kalkınma Amaçları

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Araştırmacılar(38)

• Acar, Ramazan
• Akgül, Melek
• Akpolat, Mustafa
• Cemalgil, Selim
• Çapar, Berna
• Dal, Murat
• Dalğıç, Aras
• Demirbilek, Deniz
• Doğan, Yusuf
• Emiroglu, M. Emin
• Erdem, Özlem
• Etli, Serkan
• Gonen, Tahir
• Gülmez, Nihan
• Işık, Hilal Arslanoğlu
• İçen, Abdullah
• Karaman, Gökhan
• Karataş, Mehmet
• Kaya, Fatih
• Kaymaz, Kürşat
• Kırat, Güllü
• Korkmaz, Meral
• Kök, Baha Vural
• Onat, Onur
• Ozturk, Mualla
• Öğeday, Ayşenur Cumurcu
• Öğedey, Ayşenur
• Polat, Alper
• Polat, Erkan
• Polat, Muhammed T.
• Tanyol, Mehtap
• Tuna, M. Cihat
• Yalcin, Erkut
• Yalçın, Beyza Furtana
• Yalçln, Beyza Furtana
• Yilmaz, Deniz
• Yön, Burak
• Yön, Merve Şahin

• MakaleAçık Erişim2026Scopus SJRQ1/r/munzur/4701
  Upcycling Agricultural Biomass into Functional Bio-Oils through Pyrolysis: Toward Sustainable Rejuvenation of Asphalt Binder

  Furtana Yalcin, Beyza; Yilmaz, Mehmet; Yalçin, Erkut; Vural Kok, Baha

  This study investigates the feasibility of utilizing bio-oils derived from agricultural waste materials (such as straw, olive pomace, and pine cones) as rejuvenating additives in reclaimed asphalt pavement (RAP) containing bituminous mixtures, offering a sustainable and environmentally friendly approach in asphalt technology. The primary objective of the study is to enhance the physical and mechanical properties of aged binders using ecofriendly alternatives, thereby developing high-performance asphalt mixtures without harming the environment. The bio-oils, produced through pyrolysis, were evaluated in comparison with two commercial rejuvenators. Key performance criteria, including Marshall stability, moisture damage resistance (TSR), indirect tensile stiffness modulus (ITSM), and fatigue life, were tested. The results indicate that natural rejuvenators not only soften the aged binder but also effectively balance the flexibility, strength, and deformation resistance of the mixture. Notably, straw oil exhibited superior performance in terms of both high stability and extended fatigue life, while olive pomace oil demonstrated remarkable success in moisture resistance. Although commercial additives were effective to a certain extent, they failed to achieve the same level of structural compatibility and sustainability provided by natural bio-oils. In this regard, the study provides strong evidence that agricultural biomass waste can serve as a value-added solution in asphalt pavements, in alignment with the principles of the circular economy. In conclusion revealed that mixtures containing 75% RAP rejuvenated with straw oil achieved 11% higher Marshall stability and up to 14.5 times longer fatigue life compared to virgin mixtures, while olive pomace oil-based mixtures reached a TSR value of 81.5%, demonstrating superior moisture resistance.

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• MakaleAçık Erişim2026/r/munzur/4263
  Piezoelectric energy harvesters in bridge structures: Evaluation of optimal placement and energy harvesting

  Sen, Bugra; Polat, Alper; Kapicioglu, Abdullah; Esen, Hikmet

  In the present study, energy is harvested from vibrations in bridge structures caused by vehicle passages using piezoelectric energy harvesters (PEHs). In order to maximize the energy harvested, it was aimed to specify the optimal locations of PEHs. In the study, energy harvesting from vibrations in bridge structures was achieved using three different vehicle loads and three different piezoelectric materials. The project of the Ku & scedil;saray & imath;-2 bridge, located in Ku & scedil;saray & imath; village in Baskil, Elaz & imath;& gbreve;, was modelled in the ANSYS program using real measurements. The bridge was analyzed for modal, harmonic, and piezoelectric energy harvesting, respectively. The type with the highest energy production was determined using three different piezoelectric materials (PZT-4, PZT-5A, and PZT-8) for a total of 9 PEHs, and a total of 13 different analyses were performed under three different vehicle loads (60 kN, 90 kN, and 120 kN) to compare the results. The maximum total power obtained from all nine PEHs was 1.484 & micro;W under the 120 kN load with PZT-5A. The maximum power obtained from a single PEH (PEH-1) was 0.49 & micro;W. This power achieved will be adequate for wireless sensor systems used for monitoring the structural health of bridges, and considering that energy harvesting through vibration is independent of meteorological elements, unlike energy sources such as solar and wind, the environmental damage caused by waste batteries in existing systems will be prevented with the dissemination of these systems. With the development of these systems, the energy needs of services such as lighting and traffic signs can be supplied. The results provide an important foundation for the development of vibration-based energy harvesting systems in bridge structures. Thus, the study stands out as an innovative step toward sustainable energy generation in structural engineering.

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• MakaleAçık Erişim2026/r/munzur/6075
  Afet Hazırlığında Stratejik Adım: Tunceli Merkez İlçesi Toplanma Alanlarının AHP ile Analizi

  Ogedey, Aysenur

  Tunceli, zorlu arazi yapısı ve sert iklim koşulları nedeniyle yaşamın güç olduğu bir bölgedir. Kar yağışlarının yoğun olduğu kış ayları ve düşük sıcaklıklar, engebeli topoğrafya ile birleşerek çeşitli afet risklerini artırmaktadır. Bu koşullar, bölgede afet ve acil durum yönetiminin özel planlama ve hazırlık gerektirdiğini göstermektedir. Bu çalışmada, Tunceli’deki toplanma alanlarının değerlendirilmesi amacıyla Çok Kriterli Karar Verme yöntemlerinden Analitik Hiyerarşi Süreci kullanılmıştır. Analitik Hiyerarşi Süreci, ana ve alt kriterler arasındaki önceliklerin belirlenmesine olanak sağlayarak afet yönetimi süreçlerinde karar vermeyi sistematik hâle getirmektedir. Analiz sonuçları, ana kriterler arasında en yüksek ağırlığa sahip faktörün “toplanma alanı güvenliği” olduğunu (0,707) ortaya koymuştur. Alt kriterler kapsamında ise “toplanma alanı özelliği” içinde “erişim ve tahliye kolaylığı” (0,559) ve “erişim” ana kriteri altında “tabela, kroki ve işaretleme ile yer belirleme” (0,550) öne çıkmaktadır. Bulgular, Analitik Hiyerarşi Süreci’nin Tunceli’de afet toplanma alanlarının güvenlik ve erişilebilirlik odaklı planlamasında etkili bir araç olduğunu göstermektedir. Çalışma, ayrıca afet yönetimi uygulamalarında bilimsel ve sistematik karar verme yöntemlerinin önemini vurgulamaktadır.

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• MakaleAçık Erişim2026/r/munzur/5985
  Effect of Source Parameter Variability on RVT-Based Site Response Analysis: A Case Study for the Aegean Region of Türkiye

  Icen, Abdullah

  This study investigates the influence of source parameter variability specifically stress drop and anelastic attenuation on site response analysis using the Random Vibration Theory (RVT) framework. Site amplifications were computed for a representative site in the Aegean region of Türkiye using four different source parameter sets based on regional literature. A single set of randomized Vs profiles was used to account for subsurface variability, while varying source models enabled the evaluation of epistemic uncertainty in site amplification. The epistemic uncertainty associated with source parameters, expressed as τsource, peaks at approximately 0.04 s, reflecting the sensitivity of high-frequency site response to stress drop and attenuation. The study provides a regionally calibrated quantification of source-parameter-driven epistemic uncertainty for the Aegean region. The findings emphasize the need to account for source-related uncertainty in seismic hazard assessment. Unlike most previous RVT-based studies, this work explicitly isolates and quantifies the effect of stress drop and attenuation on site amplification, highlighting a novel contributor to epistemic uncertainty. Future work should incorporate Monte Carlo simulation of source parameters to support PSHA applications.

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• MakaleAçık Erişim2026/r/munzur/5974
  Farklı Deprem Düzeylerinde Doğrusal Olmayan 1B Zemin Tepki Analizi ve TBDY (2018) ile Ampirik Büyütme Fonksiyonu Kıyaslaması

  Icen, Abdullah

  Bu çalışmada, Türkiye Bina Deprem Yönetmeliği (TBDY, 2018) kapsamında elde edilen DD-1, DD-2 ve DD-3 tasarım spektrumlarına uyumlu yer hareketleri kullanılarak bir boyutlu (1B) doğrusal olmayan zemin tepki analizleri gerçekleştirilmiştir. Analizlerde Hatay–İskenderun 3113 kuvvetli yer hareketi istasyonuna ait VS30 = 240 m/s hız profili kullanılmıştır. Kayıt seçimi, PEER NGA-West2 ve SMD-TR veri tabanlarından seçilmiştir. Her bir deprem düzeyi için doğrusal olmayan (NL) analizler uygulanmış; yüzey spektrumlarıyla taban spektrumlarının oranından periyot-bağımlı büyütme eğrileri elde edilmiştir. Elde edilen büyütme eğrilerinin ortalamaları, TBDY (2018)’de tanımlı Fs–F1 katsayıları ile ve İçen ve Sandıkkaya (2023) ampirik zemin büyütme modeliyle karşılaştırılmıştır. Sonuçlar, kısa periyot bölgesinde (T < 0.3 s) büyütmelerin yaklaşık 1 civarında olduğunu ve TBDY’nin Fs katsayılarının genel olarak konservatif bir yaklaşım sergilediğini göstermektedir. Uzun periyot bölgesinde (T > 0.6 s) ise büyütmelerin İçen ve Sandıkkaya (2023) modeliyle uyumlu olduğu, ancak TBDY’nin F1 katsayılarının bu bölgede daha düşük kaldığı ve dolayısıyla kısmen yetersiz tahminler ürettiği belirlenmiştir. Bu çalışma, farklı deprem şiddet düzeylerinde (DD-1–DD-3) doğrusal olmayan davranışın zemin büyütmesi üzerindeki etkisini nicel olarak ortaya koymakta ve TBDY (2018)’deki zemin büyütme katsayılarının özellikle uzun periyot bölgesinde yeniden kalibrasyon gerektirebileceğini göstermektedir.

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• MakaleAçık Erişim2026/r/munzur/5973
  Bayesian vs. Frequentist Mixed-Effects for Regional Site Amplification

  Icen, Abdullah

  Accurate treatment of regional site effects is essential for partially non-ergodic Ground-Motion Models (GMMs). This study compares a Bayesian hierarchical regression implemented with brms to a frequentist mixed-effects formulation using lmer for estimating period-dependent site amplification. Both models adopt the same functional form with a global linear term, a nonlinear term, and region-specific random slope deviations. The analysis uses residuals from the updated Türkiye strong-motion database (SMD- TR), spanning four regions and wide ranges of VS30, magnitude, and distance. Results indicate strong agreement in global behavior: linear and nonlinear terms show similar period trends in both frameworks, and the combined regional slopes are essentially identical at all periods. The overall residual standard deviation is also nearly the same, implying comparable fit quality. Differences primarily concern decomposition and uncertainty representation. The Bayesian model resolves sharper period-dependent regional features—most notably a peak near T ≈ 0.8 s consistent with basin/edge effects—while lmer yields smoother, more conservative deviations. For median predictions, either framework is suitable because the combined coefficients and overall standard deviation coincide. For interpretation and uncertainty propagation—especially when period-dependent regional structure matters—the Bayesian approach is preferable. In addition, brms permits weakly informative priors that encode physical expectations, which stabilizes estimates in data-sparse regimes and helps prevent overfitting. Taken together, these results clarify when each framework is most appropriate: brms for physically constrained inference and robust uncertainty quantification, lmer for speed and simplicity when median predictions are the primary goal

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• MakaleAçık Erişim2026/r/munzur/5947
  Evaluation of pull-out and push-out relationship for the flat and ribbed reinforcements in concrete with different compressive strengths

  Etli, Serkan; Akgül, Melek; Doğan, Orhan

  To evaluate the performance of anchors in strengthening an existing building or to estimate the remaining service life of an existing building due to corrosion in reinforcements within the scope of academic studies, adherence tests, mostly based on pull-out are preferred. However, pull-out tests have a low usability rate and need to be more laborious in accordance with push-out tests. In this study, it is aimed to show the usability of push-out test instead of pull-out test and to reveal an empirical equation to determine the relationship between these two adherence tests on reinforced concrete samples. Within the scope of this study, dozens of bond tests were performed on reinforced 100×100×100 mm cube specimens with different concrete strengths, using flat and ribbed reinforcement types to represent existing structures. Predicted equations for these tests were very usable for estimation of pull-out strength from push-out test results.

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• MakaleAçık Erişim2026Scopus SJRQ1/r/munzur/1537
  Integrating experimental and atomistic insights into the rejuvenation of aged binder using bio-based rejuvenators

  Kurban, Mustafa; Yalcin, Beyza Furtana; Yilmaz, Mehmet; Akpinar, Sinan; Kök, Baha Vural; Hekim, Seda; Özdemir, Ahmet Münir; Yalcin, Erkut; Göktaş, Fahrettin

  This study integrates experimental and computational methods to evaluate the rejuvenation performance of an aged asphalt binder using two novel bio-based additives, 1T and 2T. The aged binder, sourced from reclaimed asphalt pavement (RAP), was modified with 25 wt% of each rejuvenator (denoted as 1T25 and 2T25, respectively). SARA (Saturates, Aromatics, Resins, Asphaltenes) fractionation and colloidal indices were used to assess compositional recovery. Both additives increased aromatic and resin contents while reducing asphaltenes. The 2T-modified binder achieved the highest colloidal stability (Ic = 0.29) and the most pronounced improvement in stability indicators (CI and Ic) among the tested systems. Complementary molecular dynamics (MD) simulations using the COMPASSII force field modeled the structural and thermodynamic behavior of RAP and rejuvenated systems. The 2T25 system exhibited higher density and more compact molecular packing, suggesting stronger cohesive organization and reduced free volume, whereas 1T25 showed greater molecular spacing and flexibility. RDF analysis and converged thermodynamic/structural trajectories (energy, temperature, cell length, and density stabilization) further supported rejuvenator-dependent rearrangement of packing during equilibration. Overall, MD acts as a mechanistic bridge that interprets experimental SARA/CI/Ic trends and supports design-oriented development of sustainable rejuvenators.

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  AtıfScopus2·OpenAlex1

  İncele
• MakaleYalnız künye2026Scopus SJRQ2/r/munzur/1525
  An Investigation of the Variability of Short-Term Drought with SPEI-Based Severity, Duration and Magnitude Parameters in a Transboundary Basin

  Akbas, Ergun; Acar, Ramazan; Eşit, Musa; Koycegiz, Cihangir

  Climate change-induced variability in the water budget leads to significant drought events. In this study, severity, duration, and magnitude parameters obtained from 1-month and 3-month series of the Standardized Precipitation Evapotranspiration Index (SPEI) were used to investigate short-term drought from different perspectives. The lower part of the Euphrates-Tigris Basin, which is a transboundary basin, was preferred as the study area within the borders of Türkiye. In this study, monthly total precipitation and monthly mean temperature data for the period 1963–2021 were used. Both graphical (Şen Innovative Trend Analysis) and statistical (Mann–Kendall, Spearman’s Rho, Sen’s Slope Estimator) trend analysis methods were applied to detect, categorize, and analyze the variability of drought. The Combination of Wilcoxon Test and Scatter Diagram (CWTSD) method, which offers both graphical and statistical trend analysis capabilities, was preferred to enhance consistency and facilitate comparison of results. According to the findings, more severe droughts are observed in the eastern part of the basin compared to the western part. Across the basin, severity and magnitude are decreasing, while duration is increasing. The increase in duration indicates that droughts are shifting from short-term to long-term periods. This situation is of great importance in terms of planning agricultural strategies.

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  AtıfOpenAlex3

  İncele
• MakaleAçık Erişim2026Scopus SJRQ1/r/munzur/1515
  Optimization, high-temperature resistance, and sulfate durability of basalt powder–blended alkali-activated slag mortars

  Arslan, Furkan; Dener, Murat; Karataş, Mehmet; Benli, Ahmet

  This study investigates the feasibility of using basalt powder (BP), an industrial by-product with limited reactivity, as a partial substitute for granulated blast furnace slag (GBFS) in alkali-activated systems. A comprehensive experimental program was conducted in two stages: first, a systematic optimization was performed by varying mixture parameters, including BP content, alkali dosage, activator modulus, and curing temperature to evaluate compressive strength development; second, selected binder compositions were used to produce self-compacting mortars, which were further examined for flexural strength, high-temperature resistance, and sulfate durability. The results demonstrated that moderate substitution levels (up to 20–30 % BP) could achieve satisfactory compressive strength, particularly under elevated curing temperature (60 °C) with 8 % Na2O and low to moderate modulus values. At 300 °C, mixtures with 20 % BP exhibited strength enhancement due to additional geopolymerization, demonstrating superior thermal stability compared to the control. Crucially, the incorporation of BP enhanced sulfate resistance, with the 40 % BP mixture exhibiting a slight increase in compressive strength after long-term exposure, in contrast to the marked deterioration of the GBFS-only system. Consequently, this study demonstrates that BP can be effectively utilized as a sustainable binder component, offering a practical solution for waste management while enhancing the durability of alkali-activated mortars against aggressive conditions.

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  AtıfScopus15·WoS13·OpenAlex10

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