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Öğe An Investigation on Seismically Isolated Buildings in Near-Fault Region(İdris Karagöz, 2022) Sesli, Hasan; Tonyalı, Zeliha; Yurdakul, MuhammetIn this study, the effects of far-fault, near-fault and pulse-type ground motions on a seismically isolated building were investigated. The 3-dimensional finite element model of the building was created in the SAP2000 software and the dynamic characteristics were determined numerically. Three different earthquake ground motion characteristics of 1999 Düzce Earthquake in Turkey were selected to evaluate the structural behavior. The record motions of the Mudurnu and Sakarya station were selected as far-fault ground motion. For near-fault ground motion, 1999 Düzce Earthquake Düzce and Lamont 1062 station records were selected. 1999 Düzce Earthquake Bolu and IRIGM 487 station records were selected as pulse-type ground motion. The behavior of the building supported by friction pendulum isolators with a displacement capacity of 48 cm was compared with the analysis results of fixed-base building. The displacement values of the 1st, 4th and 7th floors of the building were obtained. The effects of earthquake ground motions and isolator were evaluated according to floor displacement values. The seismically isolated building has a less structural demand depending on the vibration mode period under pulse-like near-fault ground motions.Öğe Evaluation of performance of asphalt binders containing capric acid based form-stable phase change materials(Elsevier Sci Ltd, 2024) Yilmaz, Bahadir; Mert, Hatice Hande; Sesli, Hasan; Ozdemir, Ahmet Muenir; Mert, Mehmet SelcukPhase Change Materials (PCMs) are functional and promising materials due to their tailored properties designed for various applications. Considering the wide range of applications, the use of PCMs with asphalt binders has also attracted attention in recent years. This study focuses on the effect of the adding fatty acid-based shapestabilized composite PCM prepared by solvent-assisted impregnation to asphalt binders. For this purpose, a favorable material, capric acid (CA) was used. In addition, pumice (PUM), a natural and abundant material also known as lightweight aggregate, was preferred as the support material. The features of the prepared composite PCM was named CA-PUM, were examined by conducting the well-known methods, namely Fourier transform infrared (FT -IR) spectroscopy, scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) analyses. The latent heat of melting of CA-PUM was found to be as 46.58 J/g with the incorporation ratio as 34.96 wt%, while the melting peak temperature was determined as 30.93 degrees C. The performance of modified asphalt binders with 0.5%-2.0% (wt/wt) CA-PUM were evaluated by penetration, softening point, rotational viscosity (RV), dynamic shear rheometer (DSR), rolling thin film oven (RTFO) and pressure aging vessel (PAV) tests. Based on the performance test results, the modified asphalt binder included 1.0 wt% CA-PUM demonstrated distinguishable properties in terms of increased resistance to deformations, the highest softening point and viscosity values besides to highest rutting performance.Öğe TBDY-2018 ile DBYBHY-2007 yönetmelik hükümlerine göre tasarımı yapılan binaların performansının incelenmesi(İdris Karagöz, 2025) Mert, Necati; Tokay, Muhammet Mustafa; Özdemir, Enes; Sesli, HasanBu çalışmada, Yalova ilinde inşa edilmiş olduğu varsayılan binaların deprem performansları, TBDY-2018 ve DBYBHY-2007 tasarım yönetmeliklerine göre değerlendirilmiştir. Çalışma kapsamında, binaların döşeme sistemi, kat sayısı ve yerel zemin sınıfları değiştirilerek, yapıların davranışları ve depreme karşı performansları STA4CAD betonarme yapısal analiz paket programı ile değerlendirilmiştir. Bu analizler sonucunda, elde edilen veriler ışığında yapıların doğal titreşim periyotları, taban kesme kuvvetleri ve etkin göreli kat ötelemeleri gibi parametreleri karşılaştırılmış ve beton ve donatı miktarlarındaki değişim incelenmiştir. Ortak bir mimari plan kullanılarak, yapıların tasarımında zemin sınıfı, kat sayısı ve döşeme sistemlerindeki değişiklikler göz önünde bulundurulmuş ve TBDY-2018 ve DBYBHY-2007’deki sınırlar dikkate alınarak yapıların davranışları incelenmiştir. Yapılan analizler sonucunda TBDY-2018’de zorunlu hale getirilen etkin kesit rijitliklerinin, yapıların davranışını önemli ölçüde değiştirdiğini ortaya koymuştur. Bu değişiklikler, yapıların daha rijit hale gelmesine ve dolayısıyla depreme karşı daha güvenli olmasına yol açmıştır. Bu doğrultuda, TBDY-2018’e göre tasarımı yapılan yapıların, DBYBHY-2007’ye göre çok daha fazla donatı ve betona ihtiyaç duyduğu görülmüştür. Ayrıca, DBYBHY-2007’ye göre tasarlanmış binaların deprem performanslarının, TBDY-2018’in belirlediği performans kriterlerini karşılamadığı tespit edilmiştir.Öğe The effect of the infinite soil domain idealized by using transmitting and viscous boundaries on the dynamic behavior of concrete gravity dams(İdris Karagöz, 2022) Sesli, HasanThe interaction between the structure and the soil on which the structure is built has a very effective effect on the structural behavior. It is unacceptable to consider the dynamic behavior of socioeconomically important structures such as dams independently of soil properties. However, the complex behavior of the infinite soil medium is not easy to idealize as the structural behavior of the dam. For this reason, in addition to the material properties of the infinite soil medium, the infinity feature should also be reflected in the structural modeling. In the finite element methods, where the interaction between the structure and the ground is taken into account, the size of the infinite soil medium causes artificial effects. Appropriate dimesions and boundary conditions should be selected for the soil domain so that artificial effects in the bounded soil domain do not affect the structural behavior. In this study, the effect of viscous and transmitting boundaries proposed for the soil-structure interaction studies was investigated. Sarıyar concrete gravity dam was taken into account for the numerical application. As a result of the study, it has been revealed that the viscous and transmitting boundaries used in dam-soil interaction studies reduce the solution cost and provide a more practical solution in dynamic analysis.
